JP2002227187A - Joint for steel pipe sheet pile and its execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for preventing the leakage of a waste permeated water resulting from the cracking of a concrete filled in a joint pipe for a steel pipe sheet pile or the outflow of a polluted water during filling of ready- mixed concrete, and its execution method. SOLUTION: A water shut-off plate 5 formed of an elastic body such as a rubber or a synthetic resin with its width larger than the inner diameter of a pipe 3 fixed to one steel pipe A and provided with plural strips of water shut-off protrusions 6 on one side face is inserted into the pipe 3 in such a manner that the water shut-off protrusions 6 are put in contact with the outside face of a CT steel 2 fixed to the other steel pipe B and both ends 5a of the water shut-off plate 5 in the cross direction are bent to the opposite side to the side where the protrusions 6 are provided, whereby both ends 5a are pressed against the inner periphery face of the pipe 3 with repulsive force on both bent ends 5a. A filler 8 such as a concrete is filled in a space of the pipe 3 on the opposite side to the face of the water shut-off plate 5 where the protrusions 6 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for a steel pipe sheet pile, and more particularly to an improvement in a joint for a steel pipe sheet pile of a type combining a CT section steel and a pipe.

[0002]

2. Description of the Related Art Conventionally, steel pipe sheet piles constructed by continuously laying a plurality of steel pipes in parallel have been used to construct a revetment wall, a breakwater or the like in a landfill. As a joint for connecting adjacent steel pipes of a steel pipe sheet pile to each other, as shown in the plan view of FIG. 2, one steel pipe B is extended along the steel pipe B on the opposite surface side of a pair of adjacent steel pipes A and B. CT steel a to be welded is fixed by welding, and the other steel pipe A has a CT steel insertion groove c.
Is welded and fixed so that a pipe b formed in the longitudinal direction extends along the steel pipe A, and the CT section steel a
There is a type that is housed inside. By pouring concrete d into the pipe b of this joint, the CT section steel a is fixed to the pipe b and water is blocked between the steel pipes A and B.

[0003]

In this joint,
Cracks e occur in concrete due to the relative displacement between the two adjacent steel pipes due to temperature changes after concrete solidification or external forces such as earthquakes or uneven settlement of the ground, and harmful wastes on the landfill side are transmitted through these cracks e. This causes a problem that leachate flows to the sea side. In addition, there is a problem that polluted water from the ready-mixed concrete flows out from the CT shape steel insertion groove c when filling the ready-mixed concrete.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional steel pipe sheet pile joint, and has a problem of leakage of waste leachate resulting from cracks in concrete filled in a pipe of the joint and filling of fresh concrete. It is an object of the present invention to provide a joint capable of preventing outflow of polluted water at the time of the above and a method for constructing the joint.

[0005]

A joint of a steel sheet pile according to the present invention for achieving the above object is a joint for connecting a pair of adjacent steel pipes of a steel sheet pile, and one of the joints on the opposite surface side of the pair of steel pipes. A CT section steel extending along the steel pipe is fixed to the steel pipe, and a pipe in which a CT section insertion groove is formed in the longitudinal direction is fixed to the other steel pipe so as to extend along the steel pipe. In a joint in which the CT section steel is housed in the pipe, the joint is made of an elastic body such as rubber or synthetic resin, has a width larger than the inner diameter of the pipe, and has a plurality of strips extending in the longitudinal direction on one side surface. A plurality of water stopping ridges having a water stopping ridge are brought into contact with the outer surface of the CT section steel, and both ends in the width direction of the water stopping plate are provided by the ridges. On the opposite side of the pipe so that it does not interfere with insertion. By inserting, it is characterized in that the the both ends were pressed against the inner peripheral surface of the pipe by repulsive force acting on the bent end portions.

In one aspect of the present invention, a water-swelling rubber having a thickness slightly smaller than the height of the ridge is bonded to the surface of the water-stop plate between the two ridges.

According to one aspect of the present invention, there is provided a joint for connecting a pair of adjacent steel pipes of a steel pipe sheet pile, and one of the steel pipes on the opposite surface side of the pair of steel pipes extends along the steel pipe. C
A T-shaped steel is fixed, and a pipe formed with a CT-shaped steel insertion groove in a longitudinal direction is fixed to the other steel pipe so as to extend along the steel pipe, and the CT-shaped steel is housed in the pipe. In the method of constructing a joint, a plurality of water stopping ridges made of an elastic body such as rubber or synthetic resin, having a width larger than the inner diameter of the pipe, and extending in the longitudinal direction are provided on one side surface. The water stop plate is brought into contact with the plurality of water stop protrusions on the outer surface of the CT section steel, and both ends of the water stop plate in the width direction are opposite to the side on which the protrusions are provided. The two ends are pressed against the inner peripheral surface of the pipe by repelling force acting on the bent both ends by inserting into the pipe so as to be bent with a repulsion force that does not hinder insertion. The present invention provides a method for constructing a joint for steel pipe sheet piles.

[0008] One embodiment of the construction method is that, after driving the pair of adjacent steel pipes, the water stop plate is inserted into the pipe, and then the surface of the water stop plate on which the ridge is formed. The space defined between the opposite surface and the inner peripheral surface of the pipe between both ends in the width direction of the water blocking plate is filled with a filler such as concrete.

[0009] In another aspect of the construction method, the water stop plate is attached to the lower end of the CT section steel so that the plurality of ridges abut on the outer surface of the CT section steel fixed to the one steel pipe. The steel pipe to which the CT-shaped steel is fixed is cast so that the CT-shaped steel is pulled into the pipe together with the water-stop plate and accommodated therein. It is characterized by doing.

In another aspect of the present invention, a joint for connecting a pair of adjacent steel pipes of a steel pipe sheet pile is provided.
On the opposite surface side of the pair of steel pipes, a CT section steel extending along the steel pipe is fixed to one of the steel pipes, and a CT section steel is fixed to the other steel pipe.
A water stop which is fixed in such a manner that a pipe in which a shape steel insertion groove is formed in a longitudinal direction extends along the steel pipe, and wherein the CT shape steel is inserted into the pipe of a joint accommodated in the pipe. A pipe made of an elastic material such as rubber or synthetic resin, having a width larger than the inner diameter of the pipe, and
A water stop plate for a joint of a steel pipe sheet pile, comprising: a plurality of water stop protrusions extending in a longitudinal direction for contacting an outer surface of a T-section steel.

In one aspect of the present invention, both ends of the water blocking plate are inclined to the side opposite to the side on which the water stopping ridges are provided, and this is caused by bending both ends further inward. The present invention provides a water stopping plate for steel pipe sheet pile joints, characterized in that one or more bending repulsion force adjusting grooves for adjusting the repulsion force are formed so as to extend in the longitudinal direction.

In one aspect of the present invention, both ends of the water blocking plate are inclined to the side opposite to the side where the water stopping ridge is provided, and this is caused by bending both ends further inward. A water stop plate for a joint of steel pipe sheet piles, characterized in that it is formed in a tapered shape whose thickness gradually decreases toward both ends in order to adjust the repulsion force.

[0013]

According to the present invention, a plurality of water stopping ridges of the water stop plate are brought into contact with the outer surface of the CT section steel, and both ends in the width direction of the water stop plate are provided. By inserting the pipe into the pipe so as to be bent to the side opposite to the side, the repelling force acting on the bent both ends presses both ends against the inner peripheral surface of the pipe, and the plurality of protrusions are connected to the CT steel. Pressure contact with the outer surface of the
Water is stopped between the outer surface of the shaped steel and between the both ends of the water stop plate in the width direction and the inner peripheral surface of the pipe. Therefore, even if the repelling force acting on the bent both ends of the water stop plate is sufficiently strong by fixing the lower end of the water stop plate to the CT section steel by bolting or the like, the water stop plate is inserted into the pipe. If it is designed to be able to do so, it is not necessary to fill the pipe with a filler such as concrete, and the filler is filled so that the ridges of the water stop plate are pressed against the CT section steel more strongly. Even in this case, it is sufficient to fill the filler only in the pipe on the opposite side of the surface where the ridge of the water stop plate is provided,
There is no danger of contaminated water of ready-mixed concrete flowing out of the CT-shaped steel groove of the pipe, and even if cracks occur in the filled concrete at a later date, waste leachate flows out to the sea side through the cracks. There is no fear.

Further, in one construction method of the present invention, the inner peripheral surface of the pipe between the surface of the water stop plate opposite to the surface on which the ridge of the CT shape steel is formed and both ends in the width direction of the water stop plate. By filling the space defined between with the filler such as concrete, the ridges of the water stop plate are pressed more strongly against the outer surface of the CT section steel, and the water stop function is improved. Can be.

In another construction method of the present invention, the water stop plate is fixed to the CT steel so that a plurality of ridges abut on the outer surface of the CT steel fixed to one steel pipe. After the steel pipe to which the pipe is fixed is cast, the steel pipe to which the CT steel is fixed so that the CT steel is accommodated in the pipe is cast. As it is strongly pressed against the outer surface of the steel and exhibits a sufficient water stopping function,
There is no need to fill a filler such as concrete after placing the steel pipe. Therefore, when the adjacent steel pipes are relatively displaced, it is possible to largely follow the change in the gap between the steel pipes without impairing the water stoppage.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 3 show an embodiment of a joint for a steel pipe sheet pile according to the present invention. FIG. 1 is a plan view showing the outline of the joint, and FIG. FIG.

In a joint 1 for connecting a pair of steel pipes A, B adjacent to each other in a steel pipe sheet pile, one of the steel pipes B on the side facing the pair of steel pipes A, B has a CT shape extending along the steel pipe. The steel 2 is welded and fixed at the end of the base 2a, and the other steel pipe A has a pipe 3 in which a CT-shaped steel insertion groove 4 is formed in the longitudinal direction so that the CT-shaped steel insertion groove 4 faces the steel pipe B. Then, it is arranged so as to extend along the steel pipe A and fixed by welding. The CT section steel 2 is accommodated in the pipe 3 with its base 2a inserted into the CT section steel insertion groove 4.

The water stop plate 5 is made of an elastic material such as rubber or synthetic resin, and has a length corresponding to the length of a portion of the steel pipes A and B where water stop is required, and a predetermined size larger than the inner diameter of the pipe 3. A plurality of (two in the illustrated example) water-stopping ridges 6 having a width only large and extending in the longitudinal direction on one side surface are provided. The water stop plate 5 has a plurality of water stop protrusions 6 in contact with the outer surface 2b of the CT section 2 and both ends 5a in the width direction of the water stop plate 5 are provided on the side where the protrusions 6 are provided. It is bent to the opposite side and inserted into the pipe 3. Both ends 5 a are pressed against the inner peripheral surface of the pipe 3 by the repulsive force acting on the bent both ends 5 a, and the ridge 6 is made of a CT steel. 2 is pressed against the outer surface 2b.

In the illustrated embodiment, both end portions 5a of the water stop plate 5 have the same thickness as the central portion 5b provided with the plurality of ridges 6, as shown in FIG. From the side where the ridge 6 is provided. A bending repulsion force adjusting groove for adjusting the repulsion force generated by bending the both end portions 5a further inward to a desired value that does not hinder insertion into the pipe 3 is provided inside the center portion of the both end portions 5a. 5c is set to extend in the longitudinal direction.

A water-swelling rubber 7 is adhered to the surface of the water stop plate 5 between the two protrusions 6 in order to further enhance the water stop function of the water stop plate 5. The thickness of this water-swelling rubber 7 is
The height is slightly smaller than the height.

In order to construct the joint 1, a steel pipe A is first cast, and then the steel pipe B is suspended such that the base 2a of the CT section 2 is inserted into the CT section insertion groove 4 of the pipe 3. When the CT section steel 2 is lowered, it is cast in a state of being housed in the pipe 3. Next, the water blocking plate 5 is bent so that the plurality of water stopping ridges 6 abut on the outer surface 2b of the CT section steel 2 and both ends 5a in the width direction of the water blocking plate 5 are bent. At the portion where the adjusting groove 5 is formed, both ends are pushed into the pipe so as to be bent inward from the state of FIG.
Next, the surface 5 of the water blocking plate 5 opposite to the surface on which the ridge 6 is formed
d and a pipe 3 between both ends 5e (FIG. 3) in the width direction of the water blocking plate 5.
Concrete in the space defined between the inner peripheral surface of
The construction is completed by filling and curing the filler 8 such as sand and asphalt. In this embodiment, the construction can be made simple and easy by adjusting the bending repulsion force by adjusting the depth of the bending repulsion force adjusting groove 5c so that the water stop plate 5 can be easily pushed in. In this case, the weak bending repulsion can be compensated by filling with a filler.

Next, the operation of the joint will be described.

At the time of construction, when concrete is filled as a filler, the concrete is
Is filled only in the space defined between the surface 5d on the side opposite to the surface on which is formed and the inner peripheral surface of the pipe 3 between both ends 5e in the width direction of the water blocking plate 5, and the CT type of the pipe 3 is filled. Since the steel insertion groove 4 side is not filled, the ready-mixed concrete is
Does not flow out of the gap between the base 2a and the base section 2a of the CT section 2.

After the construction, both ends 5a are pressed against the inner peripheral surface of the pipe 3 by the repulsive force acting on the bent both ends 5a of the water blocking plate 5, and the plurality of protrusions 6
It is pressed against the outer surface 2b of the T-section 2 to thereby press between the ridge 6 and the outer surface 2b of the CT section 2 and the water blocking plate 5
Between the both end portions 5a in the width direction and the inner peripheral surface of the pipe 3. The filler 8 presses both end portions 5a of the water-stop plate 5 more strongly against the inner peripheral surface of the pipe 3 by the pressing force, and at the same time, projects the ridges 6 on the outer surface 2b of the CT shape steel 2.
Press more strongly against.

Also, even if cracks occur in the concrete of the filler 8 due to the relative displacement between the steel pipes A and B after the construction, the water stoppage at both ends 5a of the water stop plate 5 and the ridge 6 is not impaired. Therefore, there is no danger that waste leachate will flow from the landfill side to the sea side through the cracks.

Further, with respect to the relative displacement between the steel pipes A and B, the ridge 6 of the water blocking plate 5 and the water expanding rubber 7 follow and expand and contract, so that the water stopping can be maintained.

FIG. 4 is a plan view showing a modification of the water stop plate used in the above embodiment. Note that, in this modified example and each embodiment described below, the same components as those in the embodiment of FIGS. 1 and 3 are denoted by the same reference numerals, and description thereof will be omitted.

In the example of FIG. 4, both ends 5a of the water stop plate 5
Has the same thickness as the central portion 5b at the base portion, but is formed in a tapered shape that gradually decreases toward both ends 5e, and is not provided with the bending repulsion force adjusting groove 5c of the water blocking plate 5 in FIG. . In this water stop plate 5, the bending repulsion at both ends 5a is adjusted by the degree of taper. That is, the bending repulsion is small when the thickness of both ends 5a is reduced toward both ends 5e, and the bending repulsion is large when the thickness is large.

FIG. 5 is a plan view showing a modified example of the water stop plate 5 of FIG. 3. In this example, the bending repulsion force adjusting grooves 5c are formed by four grooves.
In addition to the formation of the stripe, the opposite surface has a bending repulsion force adjusting groove 5f.
Are formed to make it easier to push the water stop plate 5.

FIG. 13 shows a modification of the embodiment shown in FIGS. 1 to 3 and is a front view of a lower end portion and an intermediate portion of the water blocking plate 5. As shown in FIG. In this example, a steel plate 11 having a desired weight is attached to a lower end portion of the central portion 5b of the water blocking plate 5 and, if necessary, to an intermediate portion in addition to the lower end portion by bolts 12. And functions to facilitate insertion of the water stop plate 5 into the pipe 3. Further, in this modified example, the pipe 3
A taper 13 is provided at the lower end of the water stop plate 5 to facilitate insertion into the inside.

FIGS. 6 to 8 show another embodiment of the present invention. FIG. 6 is a plan view showing the outline of the embodiment, and FIG. FIG. 8 is an enlarged plan view showing the water stop plate in a state where both ends are not bent.

In this embodiment, the water blocking plate 5 has a bolt insertion hole 5f (only one or several locations at the lower end in the vertical direction) at one end of the center portion 5b (the left portion in the figure in the illustrated example). FIG. 8) is formed, while C
A bolt insertion hole (not shown) is also formed at a position corresponding to the lower end of the T-section steel 2. The water blocking plate 5 is fixed to the CT section 2 by means of the water blocking plate 5 and a bolt 9 inserted into a bolt insertion hole of the CT section 2.

A pair of water stopping ridges 6 is provided on both sides in the width direction of the water stop plate at the place fixed by the bolt 9 so as to extend in the longitudinal direction of the water stop plate 5.

When this joint is to be constructed, the water stop plate 5 is attached to the outer surface 6 of the CT section steel 2 previously fixed to the steel pipe B such that the ridge 6 abuts on the CT section 2 beforehand at the factory. After the steel pipe A to which the pipe 3 is fixed is bolted to the lower end, the CT section steel 2 is drawn into the pipe 3 so as to be accommodated therein, and both ends 5a of the water stop plate 5 are inward. A steel pipe B to which the CT section steel 2 is fixed so as to be bent in the direction shown in FIG. In the illustrated example, the bolting is performed only on the left side of the central portion 5b of the water blocking plate 5 in the figure, but may be performed on the lower end portions on both right and left sides.

At the lower end of the water stop plate 5 facing the seabed, it is necessary to attach a guide plate so as not to be turned up, or to shorten the length of the water stop plate 5 in consideration of the insertion length. .

In the embodiment shown in FIG.
When the water stop plate 5 is inserted into the pipe 3 by narrowing the width of the water stop plate 5 mainly by its own weight, if the repulsion force of the water stop plate 5 is made too large, the water stop plate 5 Since it is difficult to reduce the width, the repulsion force of the water stop plate 5 must be designed to be relatively small. However, in the embodiments of FIGS. 6 to 8, the water stop plate 5 is fixed to a steel pipe in advance. Since the water stop plate 5 is attached to the CT section steel, the operation of pushing the water stop plate 5 into the pipe 3 and inserting the water stop plate 5 is forcibly performed by the weight of the steel pipe much larger than the weight of the water stop plate 5.
Even if the repulsion force is designed to be large, the water stop plate 5 can be inserted while the width of the water stop plate 5 is easily narrowed. Therefore,
In this embodiment, the seal between the width direction end of the water blocking plate 5 and the inner peripheral surface of the pipe 3 can be reliably performed,
Further, since the seal between the water stopping ridge and the outer surface of the CT section steel is sufficiently achieved by bolting the water blocking plate 5 to the CT section steel 2, the ridge of the water stopping plate 5 is formed. There is no need to fill the space in the pipe 3 on the opposite side of the provided surface with the filler. However, this space may be filled with a filler in order to further improve the water stopping function of the water stopping plate 5.

In the embodiments shown in FIGS. 6 to 8,
Since the water stop plate 5 is bolted to the CT section 2 only at the lower end thereof in order to facilitate the pushing of the water stop plate 5 into the pipe 3, the water stop plate 5 is extended over the entire length of the CT section 2. In contrast to the case of bolting, the installation of the water stop plate 5 can be greatly reduced, while the weight of the steel pipe can be used for pushing the water stop plate 5, so that the repulsion force of the water stop plate 5 can be sufficiently increased and the water stop function can be enhanced. Can be.

FIG. 9 is a plan view showing a modified example of the water stop plate used in this embodiment. As in the example of FIG. 4, the thickness of both end portions 5a of the water stop plate 5 is larger than the thickness of the central portion 5b. Both ends 5
It is formed so as to gradually decrease toward e. The bending repulsion can be adjusted by adjusting the degree of taper.

10 and 11 show a modification of the embodiment in which the water stop plate is fixed to the CT steel in advance, and FIG. 10 is an enlarged plan view showing the mounting state of the water stop plate to the CT steel. FIG. 11 is an enlarged plan view showing the water blocking plate in a state where both ends are not bent.

In this modified example, the water stop plate 5 is not bolted, but uses a surface fastener 10 to connect the water stopping plate 5 to the CT steel 2.
It is attached and fixed. The construction method and operation are shown in Figs.
This is similar to the embodiment of FIG.

In the embodiment of the type in which the water stop plate is fixed to the CT section steel, there are various means for attaching and fixing the water stop plate to the CT section steel, and the fixing means is not particularly limited.

In each of the above embodiments, the water blocking plate 5 is formed such that both end portions 5a are inclined from both ends of the central portion 5b to the side opposite to the surface on which the ridge 6 is provided.
However, the present invention is not limited to this, and the water blocking plate 5 may be formed in a straight line as shown in FIG. However, it is preferable to incline both end portions 5a because it is easy to bend when inserting into the pipe 3.

[0044]

As described above, according to the present invention, a plurality of water stopping ridges of the water stopping plate are brought into contact with the outer surface of the CT section steel and both ends in the width direction of the water stopping plate. Is inserted into the pipe so as to be bent to the side opposite to the side where the ridge is provided, so that both ends are pressed against the inner peripheral surface of the pipe by the repulsive force acting on the bent both ends, and Is pressed into contact with the outer surface of the CT section steel, and thereby, between the water stopping ridge and the outer surface of the CT section steel, and both ends in the width direction of the water blocking plate and the inner peripheral surface of the pipe. During the period, water is stopped. Therefore, the lower end of the water stop
If it is designed so that it can be inserted into the pipe even if the repelling force acting on the bent both ends of the water stop plate is sufficiently strong by fixing it to the section steel by bolting etc. It is not necessary to fill the pipe with a filler such as concrete, and even when the filler is filled to press the ridge of the water stop plate more strongly against the CT steel, the ridge of the water stop plate is not It is sufficient to fill the filler only in the pipe on the opposite side of the provided surface, so there is no danger of contaminated water of ready-mixed concrete flowing out of the CT shaped steel insertion groove of the pipe, and cracks will occur in the filled concrete at a later date. Even if it occurs, there is no danger that waste leachate will flow to the sea side through the cracks.

Further, in one construction method of the present invention, the inner peripheral surface of the pipe between the surface of the water stop plate opposite to the surface on which the ridge of the CT section is formed and both ends in the width direction of the water stop plate. By filling the space defined between with the filler such as concrete, the ridges of the water stop plate are pressed more strongly against the outer surface of the CT section steel, and the water stop function is improved. Can be.

In another construction method of the present invention, the water stop plate is fixed to the CT section steel such that a plurality of ridges abut on the outer surface of the CT section steel fixed to one steel pipe. After the steel pipe to which the pipe is fixed is cast, the CT section steel is accommodated in the pipe, and the steel pipe to which the CT section steel is fixed is cast. Since it is strongly pressed against the outer surface of the steel pipe and sufficiently exhibits a water stopping function, there is no need to fill a filler such as concrete after casting the steel pipe. Therefore, when the adjacent steel pipes are relatively displaced, it is possible to largely follow the change in the gap between the steel pipes without impairing the water stoppage.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a joint for a steel pipe sheet pile according to the present invention.

FIG. 2 is a plan view showing a joint of a conventional steel pipe sheet pile.

FIG. 3 is an enlarged plan view of a water blocking plate used in the embodiment of the present invention.

FIG. 4 is a plan view showing a modified example of a water stop plate.

FIG. 5 is a plan view showing a modification of the water stop plate.

FIG. 6 is a plan view showing another embodiment of the present invention.

FIG. 7 is a plan view showing an example of a state in which a water blocking plate is attached to a CT section steel.

FIG. 8 is an enlarged plan view of a water stop plate used in the embodiment.

FIG. 9 is a plan view showing a modification of the water stop plate used in the embodiment.

FIG. 10 is a plan view showing another example of a state in which the water blocking plate is attached to the CT section steel.

FIG. 11 is an enlarged plan view of a water stop plate used in the modification.

FIG. 12 is a plan view showing another modification of the water stoppage plate.

FIG. 13 is a front view showing another modification of the water stop plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint of steel pipe sheet pile 2 CT shape steel 3 Pipe 4 CT shape steel insertion groove 5 Water stop plate 5a Both ends of water stop plate 6 Water stop ridge 7 Water expansion rubber 8 Filler 9 Bolt 10 Surface fastener

Claims (9)

[Claims] 1. A joint for connecting a pair of adjacent steel pipes of a steel sheet pile, wherein a CT section steel extending along the steel pipe is fixed to one of the steel pipes on the side facing the pair of steel pipes. In a joint in which a CT-shaped steel insertion groove is formed in the other steel pipe and a pipe formed in a longitudinal direction is fixed so as to extend along the steel pipe, and the CT-shaped steel is accommodated in the pipe.
A water stop plate made of an elastic material such as rubber or synthetic resin, having a width larger than the inner diameter of the pipe, and having a plurality of water stop protrusions extending on one side surface in the longitudinal direction; Of the water stop plate is brought into contact with the outer surface of the CT section steel, and both ends in the width direction of the water stop plate are repelled to the opposite side of the side where the protrusion is provided so as not to hinder insertion. A joint for a steel pipe sheet pile characterized by being bent by force and inserted into the pipe, whereby both ends are pressed against an inner peripheral surface of the pipe by a repulsive force acting on the bent both ends. 2. A water-swelling rubber having a thickness slightly smaller than the height of the ridge is bonded to the surface of the water-stop plate between the two ridges. The joint of the steel pipe sheet pile as described. 3. A joint for connecting a pair of adjacent steel pipes of a steel sheet pile, wherein a CT section steel extending along the steel pipe is fixed to one of the steel pipes on the opposite surface side of the pair of steel pipes. And a pipe having a CT-shaped steel insertion groove formed in a longitudinal direction of the other steel pipe, which is fixed so as to extend along the steel pipe, and wherein the CT-shaped steel is housed in the pipe. In the above, a water-stop plate comprising an elastic body such as rubber or synthetic resin, having a width greater than the inner diameter of the pipe, and having a plurality of water-stop protrusions extending in the longitudinal direction on one side surface, A plurality of water-stopping ridges are brought into contact with the outer surface of the CT section steel, and both ends in the width direction of the water-stop plate are inserted into the opposite side of the side where the ridges are provided, so that there is no obstacle to insertion. By inserting the both ends into the pipe so as to be bent by the repulsive force of the Construction methods of the joint of the steel pipe sheet pile, characterized in that for pressing the inner circumferential surface of the pipe to the both ends by repulsive force acting on both ends. 4. After the pair of adjacent steel pipes has been cast, the water stop plate is inserted into the pipe, and then the water stop plate has a surface opposite to the surface on which the ridge is formed. 4. The joint according to claim 3, wherein a filler material such as concrete is filled in a space defined between the water stop plate and the inner peripheral surface of the pipe between both ends in the width direction of the water stop plate. Construction method. 5. The method according to claim 4, wherein a weight is attached to at least a lower end of the water stop plate. 6. The water stop plate is fixed to only the lower end of the CT section steel so that the plurality of ridges abut on the outer surface of the CT section steel fixed to the one steel pipe. After the casting of the steel pipe to which the pipe is fixed, the CT section steel is drawn into the pipe together with the water stop plate, and the steel pipe to which the CT section steel is fixed is cast. Item 3. The method of constructing a joint for steel pipe sheet pile according to item 3. 7. A joint for connecting a pair of adjacent steel pipes of a steel pipe sheet pile, wherein a CT section steel extending along the steel pipe is fixed to one of the steel pipes on the side facing the pair of steel pipes. A pipe having a CT-shaped steel insertion groove formed in a longitudinal direction is fixed to the other steel pipe so as to extend along the steel pipe, and the CT-shaped steel is housed in the pipe. A water stop plate inserted into the inside, made of an elastic body such as rubber or synthetic resin, having a width larger than the inner diameter of the pipe,
A water stopping plate for a joint of a steel pipe sheet pile, comprising a plurality of water stopping protrusions extending in a longitudinal direction for abutting an outer surface of the CT section steel on one side surface. 8. Both ends of the water blocking plate are inclined to the opposite side to the side where the water stopping ridge is provided, so as to adjust the repulsive force generated by bending the both ends further inward. 8. The method according to claim 7, wherein the one or more bending repulsion force adjusting grooves are formed to extend in the longitudinal direction.
The waterproofing plate for a joint of a steel pipe sheet pile according to the above. 9. Both ends of the water blocking plate are inclined to the opposite side to the side where the water stopping ridge is provided, so as to adjust the repulsive force generated by bending the both ends further inward. The water stop plate for a joint of a steel pipe sheet pile according to claim 7, wherein the water stop plate is formed in a tapered shape whose thickness gradually decreases toward both ends.