WO2011142047A1 - Steel wall and method for constructing steel wall - Google Patents

Abstract

Disclosed is a steel wall which combines high rigidity equivalent to that of a steel pipe sheet pile wall and high water cut-off properties equivalent to those of a steel sheet pile wall. Also disclosed is a method for constructing the steel wall, to which a technique for suppressing vibration or noise, which was difficult to do with a conventionally combined steel sheet pile can be easily applied. Specifically disclosed is a steel wall (3), wherein a plurality of hat-shaped steel sheet piles (1) are connected by joints (1d) so as to have a steel sheet pile wall, and steel pipes (2) come into contact with all of the steel sheet pile wall, or some of the hat-shaped steel sheet piles (1) so as to make the longitudinal direction thereof follow the longitudinal direction of the hat-shaped steel sheet piles (1). The construction of the steel wall (3), wherein the steel pipes (2) and the hat-shaped steel sheet piles (1) with which the steel pipes (2) come into contact are joined in contact parts with one another over the entire length of the contact parts, or the combined steel sheet pile is provided by joining the steel pipes (2) and the hat-shaped steel sheet piles (1) in some of the contact parts. Then, auger screws of earth augers are inserted into the steel pipes (2), and the combined steel sheet pile is cast by press-in while excavating a wider range of ground than the diameter of the steel pipes (2) under the steel pipes (2).

Description

Steel wall and construction method of steel wall

The present invention relates to a steel wall used for earth retaining work, deadline work, revetment, landfill, embankment and the like, and a construction method of the steel wall.

Conventionally, steel sheet piles and steel pipe sheet piles are used in various constructions such as earth retaining works, deadlines, revetments, landfills, and dikes. Steel sheet piles and steel pipe sheet piles are properly used depending on the required rigidity. Generally, steel sheet piles are used in scenes where rigidity may be low, and steel pipe sheet piles are used in scenes where high rigidity is required.

Here, the steel pipe sheet pile has a larger joint margin than the steel sheet pile. Therefore, when waterstop is required when constructing a deadline or a revetment, a method of filling the joint space with a bagging cement mortar is generally employed. In this method, when using in a waterside environment such as a river or a port, the mortar may flow out if the bag for mortar is damaged. In addition, since the gap between the bags can become a water channel, it is not necessarily suitable for applications requiring strict water-stopping.

Therefore, as a measure when water leakage prevention inside the disposal site is strictly required, such as a water-impervious revetment at a sea surface waste disposal site, a leakage prevention measure is applied to the joint space of the steel pipe sheet pile. A structure in which a space is directly filled with a filler such as mortar has been proposed (see, for example, Patent Document 1). When filling mortar in this way, after driving the steel pipe sheet pile into the ground, it is necessary to discharge the earth and sand inside the joint with a water jet etc. and fill the joint with bag mortar and mortar And has the disadvantage of requiring labor and time for field work.

On the other hand, steel sheet piles are less rigid than steel pipe sheet piles, but have excellent water-stopping properties, small joint clearance, and water-stopping properties compared to steel pipe sheet piles even when no measures are taken. high. Moreover, the water-stopping property of a steel sheet pile can be further enhanced by previously coating the joint with a swellable water-stopping material. By this method, it is possible to exhibit the water stop performance equivalent to or better than that of the steel pipe sheet pile for which the above measures have been taken, and it is possible to eliminate the labor of field work.

Therefore, as a technique for increasing the rigidity of the steel sheet pile, a technique using a combined steel sheet pile in which a U-shaped (hat-shaped) steel sheet pile constituting a wall body is integrated and stiffened is proposed (for example, Patent Document 2). The combined steel sheet pile having such a structure is usually constructed by a vibro hammer method, and a part thereof is placed by a hydraulic press-fitting method. However, there are limited cases where the Vibro hammer method can be used under severe conditions of vibration and noise in urban areas. In particular, the combined steel sheet pile having such a shape has a large cross-sectional area and a large resistance during driving. Therefore, it is considered that it is difficult to construct the hard ground even if it is driven by a hydraulic press-fitting method.

Therefore, it is conceivable to apply a construction method using an earth auger (excavation device) for excavating the ground for placement on hard ground. However, since the cross-sectional shape of the combined steel sheet pile extends over a wide range, it is necessary to devise. As an example of the contrivance, when a combined steel sheet pile having a structure similar to the combined steel sheet pile of Patent Document 2 is built, it is proposed to use the following method (for example, refer to Patent Document 3). That is, in order to straddle the range excavated by the earth auger when placing the combined steel sheet pile, and the range excavated by the earth auger when building the combined steel sheet pile placed before the combined steel sheet pile, A construction method for placing a combined steel sheet pile has been proposed.

Japanese Patent No. 3756755 JP 2002-212943 A Japanese Patent No. 4074241

As described above, the rigidity of the steel wall is higher in the steel pipe sheet pile wall than in the steel sheet pile wall. On the other hand, the water stoppage performance in the joint is more easily enhanced in the steel sheet pile wall than in the steel pipe sheet pile wall.
Then, as shown in the said patent document 2, the steel wall which has rigidity and high water stop performance can be constructed | assembled by combining a shape steel with the steel sheet pile wall which is easy to make water stop performance high.

However, combining the steel sheet pile and the shape steel increases the cross-sectional area. Therefore, as described above, there is a limit to driving the combined steel sheet pile by the hydraulic press-fitting method, and it is necessary to employ the vibro hammer method. However, in the vibro hammer method, vibration and noise during placement are problems.

When adopting a construction method using an earth auger as disclosed in Patent Document 3, it is necessary to arrange a casing outside the auger screw (excavation shaft having screw blades). This casing needs to have a length corresponding to the steel indentation length, and if the indentation length changes, the casing length also needs to be changed. In addition, since there is no steel material to be cast before that for the steel material to be placed first, it is necessary to dig the preceding excavation range with an earth auger without placing the steel material. From the above, construction takes time.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a steel wall having both high rigidity similar to that of a steel pipe sheet pile wall and high water stoppage similar to that of a steel sheet pile wall.
Another object of the present invention is to provide a method for constructing a steel wall to which a construction method that suppresses vibration and noise, which has been difficult with conventional combination steel sheet piles, can be easily applied.

In order to solve the above-mentioned problem, the steel wall according to claim 1 has a plurality of steel sheet piles connected by joints to provide a wall body, and a steel pipe on all or a part of the steel sheet pile of the wall body. Is in contact with the longitudinal direction of the steel sheet pile along the longitudinal direction of the steel sheet pile.

In invention of Claim 1, the steel wall contacts the wall body (steel sheet pile wall) which connected several steel sheet piles with the joint along the longitudinal direction in the longitudinal direction of the steel sheet pile of this wall body. Made of steel pipe. Therefore, it becomes possible to obtain a steel wall having a higher water stoppage performance than the steel pipe sheet pile wall by the steel sheet pile wall connecting the steel sheet pile joints. Furthermore, a steel wall having high rigidity (cross-sectional performance) equal to or higher than that of a steel pipe sheet pile wall can be obtained by contacting a steel pipe having high rigidity with the wall body.

In addition, when constructing a steel wall, for example, a steel sheet pile and a steel pipe may be joined to each other as a combined steel sheet pile integrated with each other. Further, the steel sheet pile and the steel pipe may be separately placed on the ground.
When placing a steel pipe or a combined steel sheet pile on the ground, it is possible to insert the excavating shaft of the excavator into the steel pipe and press-fit the steel pipe while excavating the lower side of the steel pipe. Therefore, construction with less noise can be performed even on hard ground.
When the ground is excavated by the excavator, at least a part of the portion of the ground where the steel sheet pile is placed is excavated by excavating a range wider than the outer diameter of the steel pipe. Thereby, it becomes possible to reduce the resistance of the ground when the steel sheet pile is also placed.
When a steel pipe or a combined steel sheet pile is placed using the excavator, excavation by the excavator is performed every time the steel pipe or the combined steel sheet pile is placed. Therefore, no empty digging is required at the start of construction. Further, the excavation shaft is inserted into the steel pipe, and a cylindrical casing into which the excavation shaft is inserted is not necessary. Therefore, when constructing the steel wall, it is not necessary to prepare a casing corresponding to the length of penetration of the steel pipe.

The steel wall according to claim 2 is, in the invention according to claim 1, a positional deviation in the longitudinal direction between the steel sheet pile and the steel pipe is restricted at a portion where the steel sheet pile and the steel pipe are in contact with each other. It is characterized by being.

In the invention according to claim 2, the steel sheet pile and the steel pipe are in contact with each other. For example, the steel sheet pile and the steel pipe are fixed by welding or the like over the entire length, so that the longitudinal direction between the steel sheet pile and the steel pipe is achieved. The positional deviation of is regulated. Therefore, it functions as an integral beam structure in which the steel sheet pile and the steel pipe are integrated. Thereby, although depending on arrangement | positioning (interval) of a steel pipe, the high rigidity more than a steel pipe sheet pile can be acquired. That is, by restricting the positional deviation between the steel sheet pile and the steel pipe at the surface where the steel sheet pile and the steel pipe are in contact with each other, it is possible to obtain a higher rigidity than the combined rigidity of the steel pipe and the steel sheet pile. .

According to a third aspect of the present invention, in the steel wall of the first aspect, the longitudinal displacement between the steel sheet pile and the steel pipe is allowed at a portion where the steel sheet pile and the steel pipe are in contact with each other. It is characterized by being.

In invention of Claim 3, position shift with a steel sheet pile and a steel pipe is accept | permitted in the part which the said steel sheet pile and the said steel pipe are contacting. Therefore, as a laminated beam structure in which the deflection behavior of the steel sheet pile and the steel pipe is the same, it is possible to obtain substantially the same rigidity as the combined rigidity of the steel sheet pile and the steel pipe. Thereby, although steel wall is based also on the position (space | interval) of a steel pipe, the rigidity substantially equivalent to a steel pipe sheet pile can be acquired.
Since the positional deviation is allowed between the steel pipe and the steel sheet pile, it is not necessary to join the steel pipe and the steel sheet pile, so that it is possible to eliminate the labor and time required for the joining work and to reduce the cost. Moreover, since it can convey in the state which separated the steel sheet pile and the steel pipe, conveyance efficiency can be improved compared with the state which joined the steel sheet pile and the steel pipe.

The steel wall according to claim 4 is characterized in that, in the invention according to claim 3, the steel sheet pile and the steel pipe are joined at the upper end of the wall body.

The steel wall according to claim 5 is characterized in that, in the invention according to claim 4, the joining is by coping, welding, bolts or drill screws.

In the inventions according to claim 4 and claim 5, the steel sheet pile and the steel pipe are joined, so that the structure can be more reliably functioned as a laminated beam structure. Moreover, joining of the upper end part of a wall body can be easily performed after placement.

The steel wall according to claim 6 is the invention according to any one of claims 1 to 5, wherein the steel pipe is disposed on one side surface or both side surfaces of the wall body. It is characterized by.

In the invention described in claim 6, a steel wall in a normal use environment receives a large pressure (earth pressure) from one surface. Therefore, it is reasonable to arrange the steel pipe on one side that is opposite to the side receiving the large pressure of the wall. In particular, in the case of a laminated beam structure, earth pressure acts on a wall body made of steel sheet piles, and earth pressure acts on a steel pipe via the wall body. This makes it possible to receive earth pressure reasonably.

On the other hand, for example, when the strength is required in the case of the integral beam structure, the rigidity of the steel wall can be increased by arranging the steel pipes on both side surfaces of the wall body. Moreover, when arrange | positioning a steel pipe on the both sides | surfaces of a wall, respectively, with respect to the steel pipe arrange | positioned in the surface which receives a big pressure, the position shift of the longitudinal direction with a steel sheet pile is controlled, and it is set as an integral beam structure. Moreover, with respect to the steel pipe arrange | positioned on the surface on the opposite side to the surface which receives a big pressure, the position shift of the longitudinal direction with a steel sheet pile is permitted, and it is set as a laminated beam structure. Thus, it is also possible to arrange a steel pipe on each side of the wall. Moreover, when arrange | positioning a steel pipe on both the side surfaces of a wall, it is also possible to use the steel pipe of a different size according to the side surface arrange | positioned.

The steel wall according to claim 7 is the invention according to any one of claims 1 to 6, wherein the wall body is formed in a substantially wave shape that repeats a mountain and a valley, and the steel pipe is It enters into the trough part of the said wall, and is in contact with the said steel sheet pile.

In the invention described in claim 7, since the steel pipe enters the valley portion of the wall body, the width of the steel wall along the direction orthogonal to the length direction of the wall body can be reduced. Therefore, it is space saving and excellent in space efficiency. Further, for example, when the steel sheet pile and the steel pipe are driven as an integral beam structure, the excavation range can be narrowed when excavation is used together.

The steel wall according to claim 8 is the invention according to claim 7, wherein the steel pipe is continuous or discrete in a plurality of valley portions that are continuously arranged on one side surface of the wall body. It is provided in.

In the invention according to claim 8, when steel pipes are continuously provided in a plurality of valley portions of the wall body, that is, when steel pipes are basically provided in all valley portions of the wall body. The distance between the steel pipes is constant and the steel pipes are close to each other. Therefore, the steel wall can have a stable structure, and the strength can be increased.

On the other hand, when the pressure applied to the steel wall is relatively small, or when the steel sheet piles and pipes used have high rigidity (for example, the steel pipe has a large diameter), every two or two troughs are used. To place. Thus, a steel pipe can also be arrange | positioned to a part of trough part instead of all the trough parts of a wall. That is, it is good also as a structure which arrange | positions a steel pipe discretely with respect to a trough part. In this case, the cost can be reduced by reducing the amount of steel pipe used.

The steel wall according to claim 9 is the invention according to any one of claims 1 to 6, wherein the wall body is formed in a substantially wave shape that repeats a mountain and a valley, and the steel pipe is It is in contact with the steel sheet pile on the crest portion side of the wall body.

The invention described in claim 9 requires more installation space than the case of the invention described in claim 8. However, the steel pipe diameter is not restricted by the size of the valley portion, and a steel pipe having a larger steel pipe diameter can be used, which is advantageous when high rigidity is required.

A steel wall according to a tenth aspect is the invention according to the ninth aspect, wherein the steel pipe is continuously or discretely formed on a plurality of peak portions formed continuously along one side surface of the wall body. It is provided in.

In the invention according to claim 10, in a similar manner to the invention according to claim 8, when steel pipes are continuously provided at a plurality of peak portions of the wall body, the steel wall has a stable structure. can do. Thereby, the strength of the steel wall can be increased.
On the other hand, when the pressure applied to the steel wall is relatively small, or when the steel sheet pile or the steel pipe used has high rigidity, the steel pipe is discretely arranged with respect to the mountain portion. Thereby, the usage-amount of the steel pipe of steel walls can be reduced, and cost reduction can be aimed at.

The steel wall according to claim 11 is the invention according to any one of claims 1 to 10, wherein the steel sheet pile and the steel pipe are different from each other in length in the longitudinal direction. Features.

In invention of Claim 11, for example, these are made the same by lengthening the length (vertical length) of the longitudinal direction of a steel pipe with respect to the length (vertical length) of the longitudinal direction of a wall body. The rigidity of the steel wall can be increased as compared with the length.
On the other hand, you may make it make the length of the longitudinal direction of a wall body longer than the length of the longitudinal direction of a steel pipe. The vertical length of the steel pipe is determined from the viewpoint of the rigidity of the steel wall. At this time, when the vertical length of the wall body is about the same as the length of the steel pipe, if there is concern about boiling, heaving or arc slip, the vertical length of the wall body may be made longer than the steel pipe.

The steel wall according to claim 12 is the invention according to any one of claims 1 to 11, comprising at least two steel wall dividing portions having different extending directions, and the steel wall. Each of the divided portions includes the wall body and the steel pipe in contact with the wall body, and a corner portion is provided by abutting ends of the two steel wall divided portions to each other, and the two steel walls are provided. A joint is provided on the steel pipe disposed at the end of the steel wall split part of one of the split parts on the corner part side, and the joint of the steel pipe and the corner of the other steel wall split part are provided. The steel sheet pile joint at the end on the part side is connected.

A steel wall according to a thirteenth aspect is the invention according to any one of the first to eleventh aspects, wherein the steel wall includes the wall body and the steel pipe in contact with the wall body, and the extending directions thereof are mutually. At least two different steel wall divisions are provided, each of the steel wall divisions including the wall body and the steel pipe contacting the wall body, and the ends of the two steel wall division parts protrude from each other. A joint is provided in the steel pipe arranged at the end on the corner part side of each of the two steel wall division parts by being joined together, and these joints are connected to each other. Features.

In the inventions according to claims 12 and 13, in any case, two steel wall dividing portions are connected by a joint at a corner portion of the steel wall. Thereby, a shift | offset | difference does not arise in the direction which each steel wall division part should face. Moreover, a steel pipe can be arrange | positioned at a corner part. Furthermore, the steel pipe at the corner and the steel pipe adjacent to the steel pipe can be arranged close to each other in two directions intersecting each other. For these reasons, rigidity can be ensured even in the corner portion.

In the construction method of the steel wall according to claim 14, a plurality of steel sheet piles are connected by a joint to provide a wall body, and a steel pipe has a longitudinal direction in all or a part of the steel sheet piles of the wall body. It is a construction method of a steel wall that is in contact along the longitudinal direction of the steel sheet pile,
Before placing, the steel pipe and the steel sheet pile in contact with the steel pipe are joined over the entire contact part, or joined at a part of the contact part to form a combined steel sheet pile,
Inserting a drilling shaft of a drilling device into the steel pipe of the combined steel sheet pile, and driving the combined steel sheet pile while excavating the ground in a range wider than the diameter of the steel pipe with the drilling device under the steel pipe It is characterized by.

In invention of Claim 14, the water stop performance higher than a steel pipe sheet pile wall can be obtained with the wall body which consists of a steel sheet pile by combining a steel pipe and a steel sheet pile. Moreover, the steel wall can obtain the same rigidity as the steel pipe sheet pile wall.
In addition, because the combined steel sheet pile is driven into the ground while excavating the ground, the combined steel sheet pile has a wide cross-sectional area, and even in the hard ground, the combined steel sheet pile has low noise and vibration. Can be placed on the ground. Moreover, the excavation shaft of the excavator is in a state of being inserted into the steel pipe, and a cylindrical casing into which the excavation shaft of the excavator is inserted is not necessary.

In the construction method of the steel wall according to claim 15, a plurality of steel sheet piles are connected by a joint to provide a wall body, and a steel pipe has a longitudinal direction on all or a part of the steel sheet piles of the wall body. It is a construction method of a steel wall that is in contact along the longitudinal direction of the steel sheet pile,
A steel sheet pile in which a drilling shaft of a drilling device is inserted into the steel pipe, the steel pipe is driven while excavating the ground in a range wider than the diameter of the steel pipe with the drilling device under the steel pipe, and then the steel pipe is in contact with the steel pipe It is characterized by placing.

In the invention described in claim 15, by placing the steel sheet pile after placing the steel pipe, the steel pipe and the steel sheet pile are allowed to be displaced at their contact portions. Thereby, the steel wall manufactured by this construction method becomes a steel wall having a laminated beam structure. Therefore, the water stop performance higher than a steel pipe sheet pile wall can be obtained by the wall body which consists of a steel sheet pile. Moreover, although it is lower than the rigidity of the combined steel sheet pile in the case of an integral beam structure, at least rigidity substantially equivalent to that of a steel pipe sheet pile wall made of a steel pipe sheet pile having substantially the same diameter as the steel pipe can be obtained.

In addition to that, the steel pipe is placed on the ground while excavating the ground over a wider diameter than the steel pipe, and the steel sheet pile that touches this steel pipe is placed after the steel pipe is placed. This facilitates not only placing the steel pipe but also placing a steel sheet pile that is placed over at least part of the excavated portion around the steel pipe. Moreover, it is not necessary to use a casing like the invention of Claim 14.

The construction method of the steel wall according to claim 16, wherein a plurality of steel sheet piles are connected by a joint to provide a wall body, and a steel pipe has a longitudinal direction in all or a part of the steel sheet piles of the wall body. It is a construction method of a steel wall that is in contact along the longitudinal direction of the steel sheet pile,
A ground having a wider range than the diameter of the steel pipe is excavated by a drilling device, and a steel sheet pile and a steel pipe are placed in the excavated range.

In the invention described in claim 16, a steel sheet pile and a steel pipe in contact with the steel sheet pile are placed in a range excavated by the excavator. Furthermore, steel walls are constructed by connecting steel sheet piles with joints. Therefore, even if the steel wall having the rigidity and water stopping performance equal to or higher than those of the steel pipe sheet pile wall is hard ground, it can be placed while suppressing noise and vibration.

The construction method of the steel wall according to claim 17, wherein a plurality of steel sheet piles are connected by a joint to provide a wall body, and a steel pipe is provided in the longitudinal direction of all or part of the steel sheet piles. And a steel wall in which displacement of the steel sheet pile and the steel pipe in the longitudinal direction is allowed at a portion where the steel sheet pile and the steel pipe are in contact with each other. This construction method is characterized in that it is placed while the steel pipe is attached to the existing wall body.

In the invention of claim 17, for example, when an existing steel sheet pile wall is installed, it is not removed but is used as it is to construct a highly rigid steel wall. is there.

The method for constructing a steel wall according to claim 18, wherein a plurality of steel sheet piles are connected by joints to provide a substantially wave-like wall body that repeats a peak and a valley, and is continuously provided on one side surface of the wall body. The steel pipes are continuously provided in a plurality of valley portions or mountain portions formed side by side, and the steel pipes are aligned with the longitudinal direction of the steel sheet piles to the steel sheet piles. A steel wall construction method in which longitudinal displacement between the steel sheet pile and the steel pipe is allowed at a portion where the steel sheet pile and the steel pipe are in contact with each other, wherein the steel pipe is A hydraulic press-fitting method in which a reaction force is taken from the steel pipe that has been previously press-fitted and the steel pipe is press-fitted, or a rotary press-fitting method in which a reaction force is taken from the steel pipe that has been previously press-fitted and pressed while rotating the steel pipe It is characterized by setting

In the invention described in claim 18, vibration and noise during construction can be suppressed to be relatively small by placing by hydraulic press-fitting method or rotary press-fitting method. Accordingly, it is possible to construct a steel wall having the above-described effects while suppressing noise and vibration.

The present invention can obtain the same high water stopping performance as that of a conventional steel sheet pile wall, and can obtain a rigidity equal to or higher than that of a steel pipe sheet pile wall. Further, the present invention can be constructed by a construction method that suppresses noise and vibration.

It is a principal part schematic plan view which shows the steel wall which concerns on embodiment of this invention. It is a schematic perspective view of the principal part which shows the said steel wall. It is a side view which shows the earth auger used with the construction method of the said steel wall. It is a figure for demonstrating the excavation range by the earth auger in the construction method of the said steel wall. It is a figure for demonstrating the construction method which drives a steel pipe along the existing steel sheet pile wall as a modification of the construction method of the steel wall of the said embodiment. It is a schematic plan view of the steel wall principal part which shows the excavation range of an earth auger while showing the modification of the steel wall of the said embodiment. It is a schematic plan view of the steel wall principal part which shows another modification of the steel wall of the said embodiment, and shows the excavation range of an earth auger. It is a schematic plan view of the steel wall principal part which shows another modification of the steel wall of the said embodiment, and shows the excavation range of an earth auger. It is a principal part schematic plan view which shows another modification of the steel wall of the said embodiment. It is a figure for demonstrating the excavation range by the earth auger in the construction method of the steel wall shown in FIG. It is a principal part schematic plan view which shows another modification of the steel wall of the said embodiment. It is a figure for demonstrating the excavation range by the earth auger in the construction method of the steel wall shown in FIG. It is a figure for demonstrating the example which made the steel pipe longer than the steel sheet pile (wall body) in the steel wall of the said embodiment. It is a figure for demonstrating the example which made the steel sheet pile (wall body) longer than the steel pipe in the steel wall of the said embodiment. It is a figure for demonstrating the case where there exists a corner part in the steel wall of the said embodiment. It is a figure for demonstrating the case where there exists a corner part in the steel wall of the said embodiment. It is a figure for demonstrating the example which provided the coupling in the steel pipe, when there exists a corner part in the steel wall of the said embodiment. It is a figure for demonstrating another example which provided the coupling in the steel pipe, when the steel wall of the said embodiment has a corner part. It is a figure for demonstrating another example which provided the coupling in the steel pipe when the steel wall of the said embodiment has a corner part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the steel wall 3 of this embodiment is configured by combining a hat-shaped steel sheet pile 1 as a steel sheet pile and a steel pipe 2. The steel pipe 2 is in contact with the longitudinal direction of the hat-shaped steel sheet pile 1 along the longitudinal direction. Here, the longitudinal direction of the hat-shaped steel sheet pile 1 and the steel pipe 2 is made parallel to each other, and the longitudinal direction thereof is the vertical direction.

The hat-shaped steel sheet pile 1 extends to the left and right in parallel with the web 1a from the front end of the web 1a, a pair of flanges 1b extending obliquely so as to spread from both side edges of the web 1a, and the left and right flanges 1b. A pair of arms 1c and a joint 1d provided at the tip of the arm 1c are provided. The outer peripheral surface of the steel pipe 2 is in contact with the side surface on the valley side of the hat-shaped steel sheet pile 1. For example, the steel pipe 2 is in a state in contact with the valley side of the web 1 a of the hat-shaped steel sheet pile 1. Further, the diameter of the steel pipe 2 is narrower than the width of the hat-shaped steel sheet pile 1. This steel pipe 2 is in a state where a part of the steel pipe 2 enters a trough portion on one side surface of the wall body constituted by the hat-shaped steel sheet pile 1. The steel pipe 2 may be in contact with the left and right flanges 1b. The steel pipe 2 may be in contact with at least one of the left and right flanges 1b and the web 1a. Further, as described later, the steel pipe 2 may be in contact with the side surface on the mountain side of the hat-shaped steel sheet pile 1.

The plurality of hat-shaped steel sheet piles 1 are in a state in which the steel sheet pile walls are constructed by connecting the joints 1d and arranging them in a row. Moreover, the hat-shaped steel sheet pile 1 and the steel pipe 2 are driven in the ground.

In this steel wall 3, the hat-shaped steel sheet pile 1 and the steel pipe 2 are joined together by welding, bolts or the like to be integrated, and the cross section may be held as an integrated beam structure. In addition, the hat-shaped steel sheet pile 1 and the steel pipe 2 may be brought into a state of being in contact with each other without being joined. That is, in some cases, the hat-shaped steel sheet pile 1 and the steel pipe 2 are arranged so that their longitudinal directions are parallel to each other so that they have the same bending behavior. When high rigidity is required, it is preferable to join the steel pipe 2 and the hat-shaped steel sheet pile 1 over the entire length in the longitudinal direction by welding, bolting or the like to form an integral beam structure.

In addition, it is not always necessary to join the steel pipe 2 and the hat-shaped steel sheet pile 1 over the entire length in the longitudinal direction. For example, the steel pipe 2 and the hat-shaped steel sheet pile 1 may be joined at a part of the entire length in the longitudinal direction, or a plurality of places may be joined intermittently. For example, the steel pipe 2 and the hat-shaped steel sheet pile 1 should just be joined so that the position shift of a longitudinal direction may be controlled in the part which mutually contacts.

On the other hand, if the performance of the steel pipe 2 itself is sufficient as the rigidity of the steel wall 3, a laminated beam structure may be used in consideration of processing effort and cost for integration by welding or bolts. In the laminated beam structure, the longitudinal displacement between the steel pipe 2 and the hat-shaped steel sheet pile 1 is allowed at the portion where the steel pipe 2 and the hat-shaped steel sheet pile 1 are in contact. Moreover, in the case of a laminated beam structure, it is set as the structure which receives earth pressure on the hat-shaped steel sheet pile 1 side (the side opposite to the surface which contact | connects the steel pipe 2). By doing in this way, it can prevent that earth pressure acts in the direction which separates the hat-shaped steel sheet pile 1 and the steel pipe 2. As shown in FIG. Further, when the steel pipe 2 and the hat-shaped steel sheet pile 1 are simultaneously placed on the ground, the steel pipe 2 and the hat-shaped steel sheet pile 1 may be temporarily joined partially. Furthermore, it is preferable that the hat-shaped steel sheet pile 1 and the steel pipe 2 are joined to each other at the upper end portion of the steel wall 3 by coping, welding, bolts, drill screws, or the like, because the steel beam 3 functions more reliably.

In FIG. 1, the steel pipes 2 are in contact with all the hat-shaped steel sheet piles 1 respectively. However, if the rigidity is within an allowable range, the steel pipe 2 can be thinned out by combining every other steel pipe 2 with the hat-shaped steel sheet pile 1 (that is, the steel pipes are discretely arranged). Can also). Moreover, even if it is a laminated beam structure, since the steel pipe 2 stiffens the hat-shaped steel sheet pile 1, it becomes possible to gain rigidity with the steel pipe 2 and to have rigidity equivalent to a steel pipe sheet pile. Further, the above-described integrated beam structure has rigidity superior to the stacked beam structure.

In this steel wall 3, as described above, a sheet pile wall is formed from the steel sheet pile (hat-shaped steel sheet pile 1). In addition to this, the sheet pile wall is stiffened by the steel pipe 2 in contact with the steel sheet pile. Therefore, the steel wall 3 can obtain a higher water stop performance than the steel pipe sheet pile at the joint portion of the steel sheet pile wall made of the steel sheet pile. Furthermore, the steel wall 3 can obtain high rigidity by the steel pipe 2. That is, the steel wall 3 can obtain a rigidity equal to or higher than that of a steel pipe sheet pile wall made of a steel pipe sheet pile, and can easily obtain a higher water stopping performance than the steel pipe sheet pile.

In addition, as described above, when higher rigidity is required, high rigidity can be obtained by joining and integrating the steel sheet pile and the steel pipe 2 to form an integral beam structure. When the required rigidity is lower than the above case, a laminated beam structure in which the steel sheet pile and the steel pipe 2 are in contact with each other without being joined is used. Thereby, the work effort and cost reduction for joining a steel sheet pile and the steel pipe 2 can be aimed at.

Here, in the case of a steel wall having a laminated beam structure, for example, even if a gap of about several centimeters is generated between the steel sheet pile (hat-shaped steel sheet pile 1) and the steel pipe 2, the earth and sand that have entered the gap are interposed. Thus, the steel sheet pile and the steel pipe 2 function as a laminated beam structure. That is, the state in which the steel sheet pile and the steel pipe 2 are in contact includes a case where there is actually a slight gap between the steel sheet pile and the steel pipe 2. As long as the function as a stacked beam structure can be exhibited.

Next, the construction method of the steel wall 3 will be described.
In the construction of the steel wall 3, it is preferable that the hat-shaped steel sheet pile 1 and the steel pipe 2 can be placed on the ground by a construction method with little noise and vibration even on hard ground. For example, it is preferable to place a steel pipe 2 or a combination steel sheet pile of the steel pipe 2 and the hat-shaped steel sheet pile 1 on the ground using an earth auger 11 as a drilling device.

Figure 3 shows an example of an earth auger. The earth auger 11 includes a leader mast 12 that can be raised and lowered by a heavy machine 20 such as a crawler and that is vertically supported, and an auger drive unit 13 that is provided on the leader mast 12 so as to be movable up and down. In addition, the earth auger 11 is connected to the auger drive unit 13 and is rotated and driven by an auger screw (spiral auger) 14 and a steel pipe set unit for setting the steel pipe 2 below the auger drive unit 13. 15. Furthermore, the earth auger 11 has a steel material gripping portion 17 for setting the hat-shaped steel sheet pile 1 when the steel pipe 2 and the hat-shaped steel sheet pile 1 are driven together on the ground with a laminated beam structure, and the steel pipe 2 and the hat-shaped structure. A hydraulic cylinder 18 for press-fitting the steel sheet pile 1 into the ground, and an attachment 21 having an auger bit and joined to the tip of the auger screw 14 are provided.

When constructing a steel wall with an integral beam structure, a combined steel sheet pile in which the steel pipe 2 and the hat-shaped steel sheet pile 1 are integrated, and a combined steel sheet pile joint in which the joint 1d of the combined steel sheet pile is first placed. It will be placed while fitting with 1d.

First, the upper end of the steel pipe 2 is supported by the steel pipe setting part 15 and the auger screw 14 is inserted into the steel pipe 2. In addition to this, the hat-shaped steel sheet pile 1 may be gripped by the steel material gripping portion 17.

Thereafter, the steel pipe 2 and the auger screw 14 are pressed downward by the hydraulic cylinder 18. At this time, the auger drive unit 13 rotates the auger screw 14 and the attachment 21 attached to the tip thereof and having an auger bit to excavate the ground. Further, as shown in FIG. 4, the excavation range 5 is slightly wider than the outer diameter of the steel pipe 2 and extends to the vicinity of the joint 1 d of the hat-shaped steel sheet pile 1. By doing so, most of the combined steel sheet piles will be placed on the excavated ground, so even if the ground is hard, the steel pipe and steel sheet pile can be easily placed. Can do.

In the case of the laminated beam structure, if the steel pipe 2 and the hat-shaped steel sheet pile 1 are partially joined by bolting or welding to the extent that they are not separated during placement, the same method as in the case of the above-mentioned integral beam structure can be used. Can be used.

Moreover, in the case of a laminated beam structure, the hat-shaped steel sheet pile 1 and the steel pipe 2 may be driven separately. In this case, first, only the steel pipe 2 is set on the earth auger 11, and the steel pipe 2 is driven first while excavating the above-described excavation range 5 by the earth auger 11. Thereafter, the hat-shaped steel sheet pile 1 is placed. Also in this case, the excavation range 5 overlaps with the placement position of the hat-shaped steel sheet pile 1. Further, when two or more steel pipes 2 are driven in advance with respect to the hat-shaped steel sheet pile 1, the excavation range 5 is slightly expanded to include the entire driving position of the hat-shaped steel sheet pile 1 in the excavation range 5. You may do it.

Also, as another method, the steel pipe 2 and the hat-shaped steel sheet pile 1 may be driven separately after excavating the excavation range 5 with the earth auger 11 on which the steel pipe 2 is not set first. Since the ground is excavated before the placement, the resistance force during the placement is reduced, and in this case, the placement can be performed by a hydraulic press-fitting method or the like with a small vibration. In this case, the excavation range 5 may be slightly expanded so that the entire placement position of the hat-shaped steel sheet pile 1 is included in the excavation range 5. Also in this case, since the side surface on the valley side of the hat-shaped steel sheet pile 1 is in contact with the outer surface of the steel pipe 2, the excavation range 5 is relatively small.

In this construction method of the steel wall 3, since it is sufficient to dig a range slightly wider than the outer diameter of the steel pipe 2 as the digging range 5, it is possible to suppress an increase in power required for digging. Therefore, it is not necessary to excavate a considerably wide area apart from the steel sheet pile wall as in the method of Patent Document 3, for example.

Moreover, when the steel sheet pile 1 and the steel pipe 2 are driven separately, if the pitch of the steel pipe is set to a pitch that can be constructed with an existing hydraulic press, each of them is driven using the existing hydraulic press. Can do. In that case, when the steel sheet pile 1 is placed, the steel sheet pile previously placed is grasped. When the steel pipe 2 is placed, the steel pipe previously placed is grasped and continuously placed in the wall direction. Is possible.

On the other hand, in the conventional construction method in which the steel sheet pile and the H-shaped steel are respectively cast without being integrated to constitute the wall of the laminated beam structure, the reaction force frame is always applied in the casting of the H-shaped steel. Is required. That is, in the press-fitting machine, when the reaction force cannot be obtained from the steel sheet pile previously placed, the H-shaped steel is press-fitted by holding the reaction force frame instead of the steel sheet pile.
An earth auger 11 having a casing may be used.

In this steel wall 3, as described above, the sheet pile wall is formed from the steel sheet pile (hat-shaped steel sheet pile 1), and the sheet pile wall is stiffened by the steel pipe 2 in contact with the steel sheet pile. . Therefore, it is possible to obtain a higher water stop performance than the steel pipe sheet pile at the joint portion of the steel sheet pile wall made of the steel sheet pile, and it is possible to obtain high rigidity by the steel pipe 2. That is, the rigidity equal to or higher than that of a steel pipe sheet pile wall made of a steel pipe sheet pile can be obtained, and higher water stopping performance than that of the steel pipe sheet pile can be easily obtained.

Furthermore, it is preferable that the steel sheet pile and the steel pipe 2 are joined at the upper end by coping, welding, bolts or drill screws after the placement.

Moreover, when higher rigidity is requested | required, high rigidity can be acquired by joining and integrating the steel sheet pile and the steel pipe 2, and making it an integral beam structure. When the required rigidity is lower than the above-mentioned case, the labor and cost for joining the steel sheet pile and the steel pipe 2 by joining the steel sheet pile and the steel pipe 2 without joining them are made. Can be reduced.
Further, in a state where the auger screw 14 which is the excavation shaft of the earth auger 11 as the excavating device is inserted into the steel pipe 2, the steel pipe 2 or the ground below the steel pipe 2 and the steel sheet pile is in a wider range than the outer diameter of the steel pipe 2. Excavating across. The steel pipe 2 or the steel pipe 2 and the steel sheet pile are pressed into the ground while excavating in this way. Therefore, even on hard ground, the steel wall 3 can be constructed with small noise and vibration.

Furthermore, as another method, as shown in FIG. 5, the steel wall 83 may be constructed by placing the steel pipe 2 on the existing steel sheet pile wall 6 while being attached. In this case, a steel beam pile (hat-shaped steel sheet pile 1) side is subjected to earth pressure by placing the steel pipe 2 on the opposite surface of the steel sheet pile wall 6 to the side opposite to the earth pressure receiving side. It can be a structure. Since the existing steel sheet pile wall 6 is not removed but used as it is, it is extremely rational.

When placing the steel pipe 2 along the steel sheet pile wall 6, if the upper part of the steel sheet pile wall 6 on which the steel pipe 2 is placed is exposed, the steel pipe 2 can be attached to the steel sheet pile wall 6. Easy. On the other hand, when coping concrete or the like is installed on the side of the steel sheet pile wall 6 where the steel pipe 2 is to be placed, the coping concrete is removed, and the upper portion of the steel sheet pile wall 6 is exposed to some extent before the steel pipe 2 is driven. It is easier to attach the steel pipe 2 to the steel sheet pile wall 6 when it is installed.

As a method for placing the steel pipe 2, it is preferable to place by a hydraulic press-fitting method if possible. However, when the soil is hard and it is difficult to place by the hydraulic press-in method, it can be placed by a well-known rotary press-in method. As described above, in the case of being made of concrete or the like, the steel pipe 2 provided with a cutting bit at the tip may be rotationally press-fitted and placed along the steel sheet pile 1 while punching out the front concrete. In the case of the rotary press-in method, the vibration is much smaller than at least the vibro hammer method, although not as much as the hydraulic press-in method.

After the steel pipe 2 is placed and the steel wall 83 is constructed, when the steel pipe 2 is exposed and is not preferable in appearance, the steel wall 83 may be made of concrete.

Next, referring to FIG. A steel wall 33 that is a modification of the steel wall 3 will be described. The steel wall 33 uses a Z-shaped steel sheet pile 31 as a steel sheet pile for making the sheet pile wall steel.
The Z-shaped steel sheet pile 31 includes a web 31a, a pair of flanges 31b extending obliquely in opposite directions from both side edges of the web 31a, and a joint 31d provided at the tip of these flanges 31b. Therefore, it has a schematic shape in which the hat-shaped steel sheet pile 1 is halved. The steel sheet pile wall connected to the Z-shaped steel sheet pile 31 has substantially the same shape as the steel sheet pile wall connected to the hat-shaped steel sheet pile 1 except that the position of the joint 31d is different. That is, this steel sheet pile wall has a shape in which peaks and valleys are alternately repeated.

The steel pipe 2 is arranged in a trough portion on one side of the steel sheet pile wall made of the Z-shaped steel sheet pile 31 and a part of the steel pipe 2 is in a trough portion. The outer peripheral surface of the steel pipe 2 is in contact with the webs 31 a of the two Z-shaped steel sheet piles 31.

Such a steel wall 33 is more suitable for a laminated beam structure in which the Z-shaped steel sheet pile 31 and the steel pipe 2 are not joined. In the construction, the laminated beam is one of the construction methods of the steel wall 3 described above. The construction method in the case of a structure can be used suitably. For example, after excavating the ground with the earth auger 11, the steel pipe 2 and the Z-shaped steel sheet pile 31 can be separately press-fitted into the ground. The excavation range 35 by the earth auger 11 at this time is a range including almost the entire Z-shaped steel sheet pile 31 except for the vicinity of every other joint 31 that interferes with the excavation range 35. However, if the joint 31d portion of the Z-shaped steel sheet pile 31 previously placed does not interfere with excavation by performing excavation first as described above, the entire excavation range includes the entire Z-shaped steel sheet pile 31. You can make it a little bigger.

Also, the Z-shaped steel sheet piles 31 may be driven one by one, or two Z-shaped steel sheet piles 31 that are crimped by fitting the joints 31d may be driven as a set. When two Z-shaped steel sheet piles 31 are made into one set, it is possible to implement the construction method similar to the above-mentioned hat-shaped steel sheet pile 1 fundamentally. In addition, when the steel pipes 2 are cast one by one, the Z-shaped steel sheet piles 31 may be press-fitted after the steel pipes 2 are cast using the earth auger 11 by the digging method.

Next, a steel wall 43 that is a modification of the steel wall 3 will be described with reference to FIG. The steel wall 43 uses a U-shaped steel sheet pile 41 as a steel sheet pile constituting the sheet pile wall.
The U-shaped steel sheet pile 41 includes a web 41a, a pair of flanges 41b extending obliquely so as to spread from both side edges of the web 41a, and a joint 41d provided at the tip of these flanges 41b. The steel sheet pile wall to which the U-shaped steel sheet pile 41 is connected has substantially the same shape as the steel sheet pile wall to which the hat-shaped steel sheet pile 1 is connected, except for the position of the joint 41d, and peaks and valleys are alternately repeated. It has a different shape.

The steel pipe 2 is arranged in a valley portion on one side of the steel sheet pile wall made of the U-shaped steel sheet pile 41, and a part of the steel pipe 2 is in a state where it enters the valley portion. In the case of the U-shaped steel sheet pile 41, when viewed from one side surface, the valley and the mountain are formed by different U-shaped steel sheet piles 41, so the steel pipe 2 is connected to every other U-shaped steel sheet pile 41. Will be placed. The outer peripheral surface of the steel pipe 2 is in contact with the left and right joints 41 d in a state of entering the valley portion of one U-shaped steel sheet pile 41. Further, each flange 41 b of the U-shaped steel sheet pile 41 adjacent to the left and right of the U-shaped steel sheet pile 41 in which a part of the steel pipe 2 enters the valley side is in contact with the outer periphery of the steel pipe 2. The diameter of the steel pipe 2 is wider than the width of the U-shaped steel sheet pile 41. The diameter of the steel pipe 2 may be narrower than the width of the U-shaped steel sheet pile 41 so that the steel pipe 2 contacts the web 41a of the U-shaped steel sheet pile 41.

Such a steel wall 43 is also suitable for the laminated beam structure, and in the construction, the construction method used in the laminated beam structure among the construction methods of the steel wall 3 described above can be suitably used. For example, after excavating the ground with the earth auger 11, the steel pipe 2 and the U-shaped steel sheet pile 41 can be press-fitted into the ground. At this time, the excavation range 45 by the earth auger 11 can be arranged such that the U-shaped steel sheet pile 41 in which the steel pipe 2 is not arranged on the valley side is arranged across the two excavation ranges 45. Therefore, even if the excavation range 45 is relatively narrow, the entire U-shaped steel sheet pile 41 enters the excavation range 45, so that the U-shaped steel sheet pile 41 can be easily pressed. Alternatively, the U-shaped steel sheet pile 41 may be press-fitted after the steel pipe 2 is driven by the medium digging method using the earth auger 11.

Next, a steel wall 53 which is a modification of the steel wall 3 will be described with reference to FIG. The steel wall 53 uses the U-shaped steel sheet pile 41 as a steel sheet pile which comprises a sheet pile wall similarly to the steel wall 43 shown in FIG. However, the diameter of the steel pipe 2 is narrower than the width of the U-shaped steel sheet pile 41, a part of the steel pipe 2 enters the valley side of the U-shaped steel sheet pile 41, and is in contact with the web 41a of the U-shaped steel sheet pile 41. It has become.
Moreover, the steel pipe 2 is arrange | positioned at each U-shaped steel sheet pile 41 instead of every other U-shaped steel sheet pile 41. FIG. In this case, because the arrangement of the crest and trough sides of the U-shaped steel sheet pile 41 is reversed every other, the steel pipes 2 are alternately arranged on the two side surfaces of the steel sheet pile wall made of the U-shaped steel sheet pile 41. Has been.

Such a steel wall 43 may be of either a single beam structure or a laminated beam structure, and an appropriate construction method among the construction methods of the steel wall 3 described above may be employed in the construction. The excavation range 55 has a diameter larger than the diameter of the steel pipe 2 and includes a portion excluding the joint 41d of the U-shaped steel sheet pile 41.

Next, a steel wall 63 that is a modification of the steel wall 3 will be described with reference to FIGS. 9 and 10. In the steel wall 63, the steel pipe 2 is in contact with the valley-side web 1 a of the hat-shaped steel sheet pile 1 in the steel wall 3, whereas the steel pipe 2 is in contact with the peak-side web 1 a of the hat-shaped steel sheet pile 1. It is what I did. That is, the steel pipe 2 is in contact with the crest portion on one side surface of the steel sheet pile wall.

In the steel wall 63, the steel pipe 2 and the hat-shaped steel sheet pile 1 can be joined and integrated to form the above-described integrated beam structure. In this case, rigidity higher than that of the steel wall 3 can be obtained. Therefore, the structure is effective when higher rigidity than that of the steel wall 3 is required. Moreover, in the steel wall 63, it can be set as the above-mentioned laminated beam structure, without joining the steel pipe 2 and the hat-shaped steel sheet pile 1. FIG. In this case, the rigidity becomes the same as when the steel wall 3 has a laminated beam structure. The installation range of the steel wall 63 (width perpendicular to the direction in which the hat-shaped steel sheet piles 1 are arranged) is wider than the steel wall 3. Thereby, since space efficiency deteriorates, in the case of a laminated beam structure, it is advantageous to use the steel wall 3.

In the construction of the steel wall 63 having the integral beam structure, the construction method of the integral beam structure among the construction methods of the steel wall 3 can be suitably used. Therefore, in the construction of the steel wall 63, the steel pipe 2 is joined to the hat-shaped steel sheet pile 1 as described above, and the steel wall 63 is press-fitted while excavating using the earth auger 11. However, it is necessary to widen the excavation range 65 in order to excavate the portion where the hat-shaped steel sheet pile 1 is placed except for the vicinity of the joint 1d than in the case of the steel wall 3.

Next, a steel wall 73 that is a modified example of the steel wall 3 will be described with reference to FIGS. 11 and 12. The steel wall 73 is obtained by increasing the diameter of the steel pipe 2 with respect to the effective width of the hat-shaped steel sheet pile 1. By making the steel pipe 2 have a large cross section, the steel pipe 2 has high rigidity. Therefore, when high rigidity is required for the steel wall 73, a suitable structure is obtained.

A part of the steel pipe 2 enters the valley portion of the hat-shaped steel sheet pile 1 and is in a state of being in contact with the flange 1b of the hat-shaped steel sheet pile 1 or the corner of the flange 1b and the arm 1c.
Moreover, the steel pipe 2 is not arrange | positioned for every hat-shaped steel sheet pile 1 but every other hat-shaped steel sheet pile 1 is arrange | positioned. In addition, you may arrange | position the steel pipe 2 so that there may be a space | interval wider than every other with respect to the hat-shaped steel sheet pile 1 like every two.

In this steel wall 73, even if the hat-shaped steel sheet pile 1 and the steel pipe 2 are joined as described above to form an integral beam structure, high rigidity can be obtained with the steel pipe 2 alone. Therefore, it is a structure suitable for a laminated beam structure. Moreover, since a steel pipe will be arrange | positioned with every other space | interval with respect to the hat-shaped steel sheet pile 1, it is preferable to set it as a laminated beam structure.

In the case of a laminated beam structure, the steel pipe 2 and the hat-shaped steel sheet pile 1 can be separately placed on the ground as described above. At this time, for example, the auger screw 14 is inserted into the steel pipe 2 and press-fitted while excavating using the earth auger 11. In this case, as shown in FIG. 12, the placement positions of the hat-shaped steel sheet piles 1 in which every other steel pipe 2 is not in contact are included in the adjacent excavation range 75. By doing so, the placement position of the hat-shaped steel sheet pile 1 is excavated including the joint 1d portion of the hat-shaped steel sheet pile 1. Thereby, it becomes possible to press-fit the hat-shaped steel sheet pile 1 into the ground more easily. In the case of a laminated beam structure, the ground may be excavated with an earth auger 11 on which the steel pipe 2 is not set before placing the steel pipe 2 and the hat-shaped steel sheet pile 1. In this case, the steel pipe 2 and the hat-shaped steel sheet pile 1 may be placed on the ground excavated and softened.

In any of the steel walls 33, 43, 53, 63, 73 shown in FIGS. 6 to 12, the steel wall 3 shown in FIG. 1 is described with reference to FIG. 5 using the existing steel sheet pile wall. Similarly to the above, by placing the steel pipe 2 along the steel sheet pile wall, a steel wall having a laminated beam structure can be obtained.

In the steel walls 3, 33, 43, 53, 63, 73, 83, the vertical length of the steel sheet pile (wall body) and the length of the steel pipe 2 may be different if necessary.
For example, as shown in FIG. 13, when the vertical length of the steel sheet pile wall (wall body 9) made of a steel sheet pile is made a certain length, the length of the steel pipe 2 may be made longer than this. By making the length of the steel pipe 2 longer, the rigidity of the steel walls 3, 33, 43, 53, 63, 73 becomes higher than when the length is the same.
On the other hand, as shown in FIG. 14, the vertical length of the steel sheet pile wall (wall body 9) may be made longer than the length of the steel pipe 2. The vertical length of the steel pipe 2 is determined from the viewpoint of the rigidity of the steel walls 3, 33, 43, 53, 63, 73. At this time, when the vertical length of the wall body 9 is about the same as the length of the steel pipe 2, if there is concern about boiling, heaving or arc slip, the vertical length of the wall body 9 may be made longer than the steel pipe 2. .

In the steel walls 3, 33, 43, 53, 63, 73, for example, corner portions are formed in the steel walls 3, 33, 43, 53, 63, 73 when used in a deadline or the like. .
Here, when forming the corner part in which the surface by which the steel pipe 2 is arrange | positioned becomes an inner side, the following problems will arise.

The steel wall 3 will be described as an example. As shown in FIG. 15, when trying to arrange | position the steel pipe 2 to the trough part adjacent at a corner part, the position of a part of these steel pipe 2 will mutually overlap, and the steel pipe 2 cannot be arrange | positioned. Therefore, as shown in FIG. 16, the steel pipe 2 is disposed only in one of the adjacent valley portions across the corner. In this case, depending on the rigidity of the steel pipe 2 or the steel sheet pile 1, the rigidity is insufficient. Is concerned. In addition, in FIG. 15 etc., let each part of the steel wall 3 arrange | positioned substantially orthogonally mutually so that a corner part may be pinched | interposed is made into the steel wall division part arrange | positioned in a mutually different direction. These steel wall divisions are connected at the corners.

Therefore, for example, as shown in FIG. 17, a steel pipe sheet pile joint 7 is provided in the steel pipe 2 at the corner portion, and the joint 1 d of the hat-shaped steel sheet pile 1 as a steel sheet pile is connected to the steel pipe sheet pile joint 7. Good.
The steel pipe 2 in which the steel sheet pile joint 7 is provided is disposed in a valley portion at an end on the corner side of one constituent wall dividing portion of two steel wall dividing portions perpendicular to each other sandwiching the corner portion of the corner. The hat-shaped steel sheet pile 1 in which the joint 1c is engaged with the steel sheet pile joint 7 of the steel pipe 2 is the hat-shaped steel sheet pile 1 on the most corner side of the other steel wall dividing portion.
By passing the arm 1c side portion of the joint 1d of the hat-shaped steel sheet pile 1 up and down through the slit of the steel pipe sheet pile joint 7 of the steel pipe 2, the joint 7 for the steel pipe sheet pile of the steel pipe 2 and the hat-shaped steel sheet pile 1 are obtained. It becomes a connected state.

Moreover, as another structure of a corner part, as shown, for example in FIG. 18, the arm 1c of the hat-shaped steel sheet pile 1 and its arm are attached to the steel pipe 2 arrange | positioned at the trough part of the corner side end of one wall part. You may use the structure which welded the joint part 8 which consists of the joint 1d of a front-end | tip.
The joint portion 8 of the steel pipe 2 is connected to the joint 1d of the hat-shaped steel sheet pile 1 at the corner end of the other wall body portion that is perpendicular to the one wall body portion described above. Yes.
The joint portion 8 may be, for example, one obtained by cutting a part (the arm 1c and the joint 1d) of the hat-shaped steel sheet pile 1 and welding the part to the steel pipe 2. Moreover, it is preferable that the joint part 8 of the steel pipe 2 and the arm 1c and joint 1d of the hat-shaped steel sheet pile 1 connected to the joint part 8 are arranged in a substantially straight line.

Moreover, as another structure of a corner part, as shown, for example in FIG. 19, it is a joint to both the steel pipes 2 arrange | positioned at the valley part of the most corner side of each of the two wall parts which comprise a corner part. A tube 7 (tubular joint) is provided. You may make it connect these joint pipes 7 mutually.
In the configuration of the three corner portions described above, the corner portions of the component wall 3 are all connected by a joint, and no deviation occurs in the normal direction. Moreover, the steel pipe 2 is arrange | positioned at a corner part. In addition, since the steel pipe 2 adjacent to the steel pipe 2 is disposed close to each other in two directions orthogonal to each other, rigidity can be ensured even in the corner portion.

When the joint pipe 7 is used, water sealing performance can be ensured by filling the inner side of the joint pipe 7 with mortar after connection. In this case, since filling of the mortar is performed only at the corner portion, it is possible to suppress an increase in labor and cost even if the filling of the mortar is performed.
The joint provided in the steel pipe 2 is not limited to the annular steel pipe joint 7, and a steel sheet pile joint may be used as described above, or a joint with another joint structure may be used. In short, it is only necessary that the steel pipe 2 or the steel pipe 2 and the steel sheet pile be connected by a joint.

1 Hat-shaped steel sheet pile (steel sheet pile)
2 Steel pipe 3 Steel wall 5 Excavation range 6 Existing steel sheet pile wall 11 Earth auger (excavator)
14 Auger screw (drilling shaft)
31 Z-shaped steel sheet pile (steel sheet pile)
33 Steel wall 35 Excavation range 41 U-shaped steel sheet pile (steel sheet pile)
43 Steel wall 45 Excavation range 53 Steel wall 55 Excavation range 63 Steel wall 65 Excavation range 73 Steel wall 75 Excavation range 83 Steel wall

Claims (18)

1. A plurality of steel sheet piles are connected by a joint to provide a wall, and a steel pipe is in contact with all or part of the steel sheet pile along the longitudinal direction of the steel sheet pile. Steel wall characterized by.
2. 2. The steel wall according to claim 1, wherein a positional deviation in a longitudinal direction between the steel sheet pile and the steel pipe is restricted at a portion where the steel sheet pile and the steel pipe are in contact with each other.
3. The steel wall according to claim 1, wherein a positional deviation in a longitudinal direction between the steel sheet pile and the steel pipe is allowed at a portion where the steel sheet pile and the steel pipe are in contact with each other.
4. The steel wall according to claim 3, wherein the steel sheet pile and the steel pipe are joined at an upper end portion of the wall body.
5. The steel wall according to claim 4, wherein the joining is by coping, welding, bolts or drill screws.
6. The steel wall according to any one of claims 1 to 5, wherein the steel pipe is disposed on one side surface or both side surfaces of the wall body.
7. The wall body is formed in a substantially wave shape that repeats a mountain and a valley,
   The steel wall according to any one of claims 1 to 6, wherein the steel pipe enters a valley portion of the wall body and is in contact with the steel sheet pile.
8. The steel wall according to claim 7, wherein the steel pipe is provided continuously or discretely at a plurality of valley portions formed side by side continuously on one side surface of the wall body.
9. The wall body is formed in a substantially wave shape that repeats a mountain and a valley,
   The steel wall according to any one of claims 1 to 6, wherein the steel pipe is in contact with the steel sheet pile at a crest portion side of the wall body.
10. The steel wall according to claim 9, wherein the steel pipe is provided continuously or discretely at a plurality of mountain portions formed side by side on one side of the wall body.
11. The steel wall according to any one of claims 1 to 10, wherein the steel sheet pile and the steel pipe have different lengths in the longitudinal direction.
12. The wall body and the steel pipe in contact with the wall body, and at least two steel wall divisions with different extending directions from each other,
    A corner portion is provided by the ends of the two steel wall dividing portions being abutted against each other,
    A joint is provided on the steel pipe disposed at the end portion on the corner portion side of one of the two steel wall divided portions.
    The joint of this steel pipe and the joint of the steel sheet pile of the edge part by the side of the said corner part of the other said steel wall division part are connected, The any one of Claims 1-11 characterized by the above-mentioned. Steel wall as described.
13. The wall body and the steel pipe in contact with the wall body, and at least two steel wall divisions with different extending directions from each other,
    A corner portion is provided by the ends of the two steel wall dividing portions being abutted against each other,
    A joint is provided on the steel pipe disposed at the end on the corner part side of each of the two steel wall division parts,
    The steel wall according to any one of claims 1 to 11, wherein these joints are connected to each other.
14. Steel in which a plurality of steel sheet piles are connected by a joint to provide a wall, and a steel pipe is in contact with all or part of the steel sheet pile along the longitudinal direction of the steel sheet pile. A method for constructing a wall,
    Before placing, the steel pipe and the steel sheet pile in contact with the steel pipe are joined over the entire contact part, or joined at a part of the contact part to form a combined steel sheet pile,
    Inserting a drilling shaft of a drilling device into the steel pipe of the combined steel sheet pile, and driving the combined steel sheet pile while excavating the ground in a range wider than the diameter of the steel pipe with the drilling device under the steel pipe A steel wall construction method characterized by
15. Steel in which a plurality of steel sheet piles are connected by a joint to provide a wall, and a steel pipe is in contact with all or part of the steel sheet pile along the longitudinal direction of the steel sheet pile. A method for constructing a wall,
    A steel sheet pile in which a drilling shaft of a drilling device is inserted into the steel pipe, the steel pipe is driven while excavating the ground in a range wider than the diameter of the steel pipe with the drilling device under the steel pipe, and then the steel pipe is in contact with the steel pipe A method for constructing a steel wall, characterized in that a steel wall is cast.
16. Steel in which a plurality of steel sheet piles are connected by a joint to provide a wall, and a steel pipe is in contact with all or part of the steel sheet pile along the longitudinal direction of the steel sheet pile. A method for constructing a wall,
    A method for constructing a steel wall, characterized in that a ground having a wider range than the diameter of a steel pipe is excavated by a drilling device, and a steel sheet pile and a steel pipe are placed in the excavated area.
17. A plurality of steel sheet piles are connected by a joint to provide a wall, and a steel pipe is in contact with all or part of the steel sheet pile along the longitudinal direction of the steel sheet pile. And the construction method of the steel wall in which the positional deviation in the longitudinal direction of the steel sheet pile and the steel pipe is allowed at the portion where the steel sheet pile and the steel pipe are in contact with each other,
    A method for constructing a steel wall, wherein the steel wall is placed with the steel pipe attached to the existing wall body.
18. A plurality of trough portions or crest portions are formed by connecting a plurality of steel sheet piles by joints and providing a substantially wave-like wall body that repeats a crest and a trough, and being continuously arranged on one side of the wall body. The steel pipes are continuously provided side by side, and the steel pipes are in contact with the steel sheet piles with their longitudinal directions being along the longitudinal direction of the steel sheet piles, and the steel sheet piles and the steel pipes are in contact with each other. It is a construction method of a steel wall in which the positional deviation in the longitudinal direction of the steel sheet pile and the steel pipe is allowed in the part,
    A hydraulic press-fitting method in which the steel pipe is pressed into the steel pipe by taking a reaction force from the previously press-fitted steel pipe, or a rotary press-fitting method in which the steel pipe is pressed in while taking the reaction force from the press-fitted steel pipe. A method for constructing a steel wall, characterized in that the steel wall is cast using an iron.

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