JP6867687B2 - How to bury pile core positioning device and casing for cast-in-place pile and how to form cast-in-place pile - Google Patents

Description

The present invention relates to a pile core positioning device, a method of burying a casing for cast-in-place piles, and a method of forming cast-in-place piles.

Conventionally, as a method for forming cast-in-place piles which are provided on the ground and serve as a foundation structure for supporting structures such as piers, for example, the formation of cast-in-place piles disclosed in JP-A-2008-156864 and JP-A-2005-320811. A method (hereinafter referred to as a conventional method) has been proposed.

In this conventional method, a cast-in-place pile casing made of a plurality of pipe materials spliced and connected to each other is buried in the ground, and then the soil in the cast-in-place pile casing is discharged to form a reinforcing bar in a drilling hole. A cast-in-place pile is formed by arranging (commonly known as a reinforcing bar basket) and then placing concrete in the excavation hole while pulling out the cast-in-place pile casing. After that, the concrete (surplus portion) at the upper end of the cast-in-place pile is scraped, and the structure is constructed in a continuous state at the upper end of the cast-in-place pile.

Japanese Unexamined Patent Publication No. 2008-156864 Japanese Unexamined Patent Publication No. 2005-320811

By the way, in the cast-in-place pile that is the foundation of the above-mentioned structure, the pile core is required to be as designed, but conventionally, the positioning of the pile core is based on the pile core position obtained by the survey. A centering plate with holes is laid on the ground surface, and the pile core is positioned by gripping the cast-in-place pile casing with a casing burying device installed at a predetermined position on the upper surface of the centering plate. In this state, the cast-in-place pile casing is buried by rotating and lowering the cast-in-place pile casing with the casing burying device.

However, during the burying work of the cast-in-place pile casing, for example, when the cast-in-place pile casing that rotates and descends collides with the rock in the ground, the position of the casing burying device shifts due to the impact, and therefore the cast-in-place pile pile. The core may shift. If it is found after the formation of the cast-in-place pile that the pile core is misaligned, the cast-in-place pile must be partially or wholly re-formed.

The present invention provides an epoch-making pile core positioning device, a method of burying a casing for cast-in-place piles, and a method of forming cast-in-place piles, which solves the above-mentioned problems.

The gist of the present invention will be described with reference to the accompanying drawings.

A pile core positioning device for positioning the pile core of the cast-in-place pile casing 21 buried in the ground E, which is provided radially on the base 1 provided with the GNSS mobile station 2 and the lower portion of the base 1. It has a plurality of legs 3, and a locking portion 4 for locking to the upper end opening of the cast-in-place pile casing 21 is provided at the lower end of the legs 3, and the locking portion 4 is provided with the locking portion 4. When the roller portion 5 is provided in contact with the upper end opening edge portion 21a of the cast-in-place pile casing 21 and the locking portion 4 is locked in the upper end opening of the cast-in-place pile casing 21, the GNSS movement is performed. The present invention relates to a pile core positioning device characterized in that the station 2 is configured to be arranged at an upper center position of the upper end opening.

Further, in the pile core positioning device according to claim 1, the leg body 3 is pivotally attached to the base 1 and is provided so as to be swingable in the vertical direction. ..

Further, 'a place concrete embedding method of pile casing 21 made of, bottom and name Ru tubing 21' plurality of tubing 21 which is engagement linked together embedded in the ground E, followed by the bottom The following pile core positioning device is provided on the pipe material 21'to be used to position the pile core of the pipe material 21', and then an arbitrary number of pipe materials 21' are connected to the pipe material 21'at the bottom stage and buried. and, thereafter, 'the pile core positioning device is provided on the tube member 21' top and name Ru tubing 21 and positioning the pile core, characterized in that to complete the buried the place pile casing 21 It relates to a method of burying a casing for cast-in-place piles.
Record
It has a base 1 provided with a GNSS mobile station 2 and a plurality of legs 3 radially provided below the base 1, and the lower end of the legs 3 is the upper end of the cast-in-place pile casing 21. When a locking portion 4 for locking to the opening is provided and the locking portion 4 is locked to the upper end opening of the cast-in-place pile casing 21, the GNSS mobile station 2 is located at the upper center of the upper end opening. A pile core positioning device configured to be placed at a position.

Further, in the burying process of place pile casing according to claim 3, wherein the middle stage of the tube 21 'arranged between the' the tubing 21 to be uppermost and 'the lowermost tubular member 21 The present invention relates to a method of burying a casing for cast-in-place piles, which comprises providing a pile core positioning device and positioning the pile core of the pipe material 21'in the middle stage.

Further, it is a method of burying a cast-in-place pile casing 21 composed of a plurality of pipe materials 21'joined and connected to each other, in which the lowermost pipe material 21'is buried in the ground E, and subsequently becomes the lowermost stage. A GNSS mobile station 2 is provided at the upper end of the pipe material 21'to position the pile core of the pipe material 21', and then the pipe material 21'which is the lowermost stage is connected to the pipe material 21' which is an intermediate stage and buried. Subsequently, a GNSS mobile station 2 is provided at the upper end of the pipe material 21'which is an intermediate stage to position the pile core of the pipe material 21', and then the pipe material 21'which is an intermediate stage is the uppermost pipe material 21. 'Is connected and buried, and subsequently, a GNSS mobile station 2 is provided at the upper end of the pipe material 21'which is the uppermost stage, the pile core of the pipe material 21' is positioned, and the cast-in-place pile casing 21 is buried. It relates to a method of burying a casing for cast-in-place piles, which is characterized by completing the above.

Further, in the method of burying the cast-in-place pile casing according to claim 5, the GNSS mobile station 2 is provided on a base 1 in which a plurality of leg bodies 3 are radially provided at the lower portion, and the leg bodies 3 are provided. A locking portion 4 for locking to the upper end opening of the cast-in-place pile casing 21 is provided at the lower end portion, and when the locking portion 4 is locked to the upper end opening of the cast-in-place pile casing 21. The present invention relates to a method of burying a cast-in-place pile casing, which is configured such that the GNSS mobile station 2 is arranged at an upper center position of the upper end opening.

Further, in the method of burying the casing for cast-in-place piles according to any one of claims 3 and 6, the leg body 3 is pivotally attached to the substrate 1 and is provided so as to be swingable in the vertical direction. It relates to the method of burying the casing for cast-in-place piles.

Further, in the method of burying the cast-in-place pile casing according to any one of claims 3 and 6 , the locking portion 4 has a roller portion 5 that abuts on the upper end opening edge portion 21a of the cast-in-place pile casing 21. It relates to a method of burying a casing for cast-in-place piles, which is characterized by being provided with.

Further, the cast-in-place pile casing 21 is buried in the ground E by the method of burying the cast-in-place pile casing according to any one of claims 3 to 8, and subsequently, in the cast-in-place pile casing 21. Reinforcing bars 24 are provided in the drilling holes 23 provided by discharging the soil, and then the cast-in-place pile casing 21 is pulled out and concrete is cast in the drilling holes 23 to form the cast-in-place piles 20. It relates to a method of forming cast-in-place piles, which is characterized in that.

Since the present invention is configured as described above, the pile core positioning in the cast-in-place pile casing can be easily and accurately performed. It is a method of forming a driven pile.

It is explanatory drawing of the pile core positioning apparatus which concerns on this Example. It is a perspective view which shows the main part of the pile core positioning apparatus which concerns on this Example. It is explanatory drawing of the main part of the pile core positioning apparatus which concerns on this Example. It is a process drawing of the method of burying the casing for cast-in-place piles which concerns on this Example. It is a process drawing of the method of burying the casing for cast-in-place piles which concerns on this Example. It is a process drawing of the method of burying the casing for cast-in-place piles which concerns on this Example. It is a process drawing of the method of burying the casing for cast-in-place piles which concerns on this Example. It is a process drawing of the formation method of the cast-in-place pile which concerns on this Example. It is a process drawing of the formation method of the cast-in-place pile which concerns on this Example. It is explanatory drawing of the state which provided the structure to the cast-in-place pile formed by this Example.

Embodiments of the present invention which are considered to be suitable will be briefly described by showing the operation of the present invention based on the drawings.

For example, when the locking portion 4 provided at the lower end of the leg 3 is locked to the upper end opening of the cast-in-place pile casing 21 buried in the ground E, the GNSS mobile station 2 causes the cast-in-place pile casing 21 to be locked. It is located at the upper center position of the upper end opening. In this state, the GNSS mobile station 2 positions the pile core of the cast-in-place pile casing 21.

Therefore, for example, at an arbitrary timing such as at the initial stage of burying the cast-in-place pile casing 21, during burying, or at the completion of burial, the pile core positioning device according to the present invention is simply provided in the cast-in-place pile casing 21. Positioning of the pile core of the pile casing 21 can be performed easily and accurately.

Specific examples of the present invention will be described with reference to the drawings.

This embodiment is a pile core positioning device S for positioning the pile core of the cast-in-place pile casing 21 buried in the ground E.

Specifically, the pile core positioning device S includes a base 1 provided with a GNSS (Global Navigation Satellite Systems) mobile station 2 and a plurality of legs radially provided under the base 1. Has a body 3.

The GNSS mobile station 2 positions the pile core position by using communication with the GNSS satellite 10 and the GNSS fixed station 11 (base station) capable of data communication with the GNSS mobile station 2.

Further, in this embodiment, the positioning information measured by the GNSS mobile station 2 and the GNSS fixed station 11 is sent to the information management terminal 12 (PC) using the communication line, and is transmitted to the information management terminal 12 (PC) by the monitor 12a of the information management terminal 12. Positioning information is displayed. Reference numeral 13 is a wifi router, and 14 is a data transmitter / receiver.

In this embodiment, the GNSS mobile station 2 is configured to perform positioning using the correction information of the GNSS fixed station 11 (base station) actually installed at the site, but the electronic standard obtained via the network. Any configuration that exhibits the characteristics of this embodiment, such as a configuration in which positioning is performed by the GNSS mobile station 2 using point correction information or the like, can be appropriately adopted.

As shown in FIG. 2, the substrate 1 is a plate-like body formed of an appropriate metal member, and the above-mentioned GNSS mobile station 2 is provided at the center position of the upper surface portion.

Further, on the peripheral surface portion of the substrate 1, pivotal connection portions 1a for pivotally attaching the leg body 3, which will be described later, are provided at three locations at equal intervals in the circumferential direction.

As shown in FIG. 2, the leg body 3 is a long body formed of an appropriate metal member, and in this embodiment, three leg bodies 3 that can be set to the same length even if they are expanded and contracted are provided. ing.

Specifically, it is composed of a square tubular first leg member 3a connected to the pivotal connection portion 1a of the substrate 1 and a second leg member 3b slidably inserted and connected to the first leg member 3a. Has been done.

Therefore, each leg 3 can be expanded and contracted to adjust its length, and can be swung in the vertical direction with respect to the substrate 1. The number of legs 3 can be changed as appropriate, but if the number of legs 3 is three, horizontal installation is easy and a stable installation state is possible, and positioning accuracy is improved.

Further, a locking portion 4 for locking to the upper end opening of the cast-in-place pile casing 21 is provided at the lower end portion of the leg body 3.

As shown in FIGS. 2 and 3, the locking portion 4 is configured by providing a bifurcated body having a V-shape in a side view at the lower end portion of the leg body 3, and each of the locking portions 4 is a casing for cast-in-place piles. When locked to the upper end opening of 21, the substrate 1 (GNSS mobile station 2) is configured to be arranged at the upper center position of the upper end opening.

Further, the locking portion 4 is provided with a roller portion 5 that abuts on the upper end opening edge portion 21a of the cast-in-place pile casing 21.

Therefore, when the locking portion 4 is locked to the upper end opening of the cast-in-place pile casing 21, the roller portion 5 contacts the upper end opening edge 21a with a contact area as small as possible (point contact). Therefore, it is not easily affected by the surface shape (subtle unevenness) of the cast-in-place pile casing 21, and in this respect as well, a stable installation state is possible, positioning accuracy is improved, and the roller 5 rolls. Position adjustment and horizontal angle adjustment can be performed well by moving.

Further, in this embodiment, the GNSS fixed station 11 is provided on the substrate 1'in which a plurality of (three) legs 3'are radially provided at the lower portion. Although a rod-shaped ground contact portion is provided at the lower end portion of the leg body 3', the locking portion described above may be provided.

A method of burying the cast-in-place pile casing 21, a method of forming the cast-in-place pile 20, and a method of constructing a structure using the pile core positioning device S having the above configuration will be described. The cast-in-place pile casing 21 used in this embodiment is composed of a plurality of pipe materials 21'that are spliced and connected to each other, and an excavation blade 22 is provided at the lower end of the pipe material 21'that is the lowermost stage. It is provided.

First, the centering plate 25 is arranged on the ground surface so that the center of the hole 25a is located at the pile core position P obtained by the survey, and the locking portion of the leg 3 is placed in the hole 25a of the centering plate 25. 4 is locked and the pile core positioning device S (GNSS mobile station 2) is provided at the upper center position of the hole portion 25a to confirm the position of the centering plate 25.

Subsequently, the casing burying device 26 is arranged on the centering plate 25, and the casing burying device 26 rotates and lowers the pipe material 21', which is the lowermost stage, to bury it.

Subsequently, the locking portion 4 of the leg body 3 is locked to the upper end opening of the pipe material 21'which is the lowermost stage, and the pile core positioning device S (GNSS mobile station 2) is provided at the upper center position of the upper opening. The pile core of the pipe material 21', which is the lowermost stage, is positioned (see FIG. 5). In this embodiment, each pipe material 21'is rotated and lowered and buried every time the pipe material 21'is connected.

Subsequently, an arbitrary number of pipe materials 21'are connected and buried in the lowermost pipe material 21', and an intermediate stage is arranged between the lowermost pipe material 21'and the uppermost pipe material 21'later. The locking portion 4 of the leg body 3 is locked to the upper end opening of the pipe material 21', and the pile core positioning device S (GNSS mobile station 2) is provided at the upper center position of the upper opening. Position the pile core of the pipe material 21'(see FIG. 6).

Subsequently, an arbitrary number of pipe materials 21'are connected and buried in the pipe material 21'in the middle stage used for positioning the pile core, and the leg body 3 is locked in the upper end opening of the pipe material 21'which is the uppermost stage. The pile core positioning device S (GNSS mobile station 2) is provided at the upper center position of the upper opening by locking the portion 4, and the pile core of the pipe material 21'which is the uppermost stage is positioned to position the pile core positioning device S (GNSS mobile station 2). Complete the burial of 21 (see Figure 7).

Subsequently, a reinforcing bar 24 (commonly known as a reinforcing bar basket) is provided in the excavation hole 23 provided by discharging the soil in the cast-in-place pile casing 21, and then concrete C is placed in the excavation hole 23 by the concrete placing device 27. After driving, the cast-in-place pile casing 21 is pulled out to form the cast-in-place pile 20 (see FIGS. 8 and 9).

Subsequently, the concrete (surplus portion) at the upper end of the cast-in-place pile 20 formed as described above is scraped, and the structure X is constructed in a continuous state at the upper end of the cast-in-place pile 20 (FIG. 10). reference).

Since this embodiment is configured as described above, the pile core positioning device S according to this embodiment is used as the cast-in-place pile casing 21 at any timing such as at the initial stage of burying the casing 21, during the burial, and at the completion of burial. The pile core positioning of the cast-in-place pile casing 21 can be easily and accurately performed simply by providing the pile core.

Further, in this embodiment, since the leg body 3 is pivotally attached to the base material 1 and is provided so as to be swingable in the vertical direction, it can be used corresponding to the casing 21 for cast-in-place piles of various sizes.

Further, in the present embodiment, since the locking portion 4 is provided with the roller portion 5 that abuts on the upper end opening edge portion 21a of the cast-in-place pile casing 21, a good installation state can be easily obtained. ..

Further, in this embodiment, the lowermost pipe material 21'constituting the cast-in-place pile casing 21 is buried in the ground E, and then the GNSS mobile station 2 is placed at the upper end of the lowermost pipe material 21'. The pile core of the pipe material 21'is provided and positioned, and then an arbitrary number of pipe materials 21' are connected and buried in the pipe material 21' which is the lowermost stage, and then the upper end portion of the pipe material 21'which is the uppermost stage. Since the GNSS mobile station 2 is provided in the GNSS mobile station 2 to position the pile core of the pipe material 21'and complete the burying of the cast-in-place pile casing 21, the pile core positioning is performed with extremely high accuracy.

Further, in this embodiment, the GNSS mobile station 2 is provided at the upper end of the intermediate stage pipe material 21'arranged between the lowermost stage pipe material 21'and the uppermost stage pipe material 21', and the intermediate stage is provided. Since the pile core of the pipe material 21'is positioned, the pile core positioning with higher accuracy is performed.

Further, this embodiment is provided by burying the cast-in-place pile casing 21 in the ground E by the above-mentioned method of burying the cast-in-place pile casing, and then discharging the soil in the cast-in-place pile casing 21. Since the reinforcing bar 24 is provided in the drilling hole 23, and then the cast-in-place pile casing 21 is pulled out and concrete is cast in the drilling hole 23 to form the cast-in-place pile 20, there is no deviation in the position of the pile core (pile core). It is possible to form a good cast-in-place pile 20 (with as little misalignment as possible).

The present invention is not limited to the present embodiment, and the specific configuration of each constituent requirement can be appropriately designed.

E Ground 1 Base 2 GNSS mobile station 3 Leg body 4 Locking part 5 Roller part
20 cast-in-place pile
21 Casting pile casing
21'Pipe material
21a Top opening edge
23 Drilling hole
24 rebar

Claims (9)

A pile core positioning device for positioning the pile core of a cast-in-place pile casing buried in the ground, with a base provided with a GNSS mobile station and a plurality of legs radially provided under the base. The lower end of the leg body is provided with a locking portion for locking to the upper end opening of the cast-in-place pile casing, and the locking portion is provided with the upper end opening edge of the cast-in-place pile casing. When the locking portion is locked to the upper end opening of the cast-in-place pile casing, the GNSS mobile station is arranged at the upper center position of the upper end opening. A pile core positioning device characterized by being configured in. The pile core positioning device according to claim 1, wherein the leg body is pivotally attached to the substrate and is provided so as to be swingable in the vertical direction. A place concrete embedding method of pile casing comprising a plurality of tubing to be engagement connected to each other, the bottom and ing tube embedded in the ground, followed by pile core below the tubing to be the lowest and positioning the pile core of the tube member is provided a positioning device, then, embedded by connecting any number of tube to tube as a bottom, then the pile core positioning the top and ing tubing A method for burying a cast-in-place pile casing, which comprises providing an apparatus to position the pile core of the pipe material and complete the embedding of the cast-in-place pile casing.
Record
It has a substrate provided with a GNSS mobile station and a plurality of legs radially provided below the substrate, and the lower end of the legs is locked to the upper end opening of the cast-in-place pile casing. A locking portion is provided, and when the locking portion is locked to the upper end opening of the cast-in-place pile casing, the GNSS mobile station is configured to be arranged at an upper center position of the upper end opening. Pile core positioning device. In the method for burying a cast-in-place pile casing according to claim 3, the pile core positioning device is provided on a pipe material in an intermediate stage arranged between the pipe material as the lowermost stage and the pipe material as the uppermost stage. A method of burying a casing for cast-in-place piles, which comprises positioning the pile core of a pipe material in the middle stage. It is a method of burying a casing for cast-in-place piles composed of a plurality of pipe materials spliced and connected to each other. The pipe material at the bottom is buried in the ground E, and then GNSS is moved to the upper end of the pipe material at the bottom. A station is provided to position the pile core of the pipe material, and then the pipe material in the middle stage is connected and buried in the pipe material in the lower stage, and then the GNSS mobile station is connected to the upper end of the pipe material in the middle stage. To position the pile core of the pipe material, and then to connect the pipe material to be the uppermost stage to the pipe material to be buried in the middle stage, and then to connect the GNSS mobile station to the upper end of the pipe material to be the uppermost stage. A method for burying a cast-in-place pile casing, which comprises providing and positioning the pile core of the pipe material to complete the embedding of the cast-in-place pile casing. In the method of burying a casing for cast-in-place piles according to claim 5, the GNSS mobile station is provided on a substrate in which a plurality of legs are radially provided at a lower portion, and the location is located at a lower end portion of the legs. A locking portion that locks to the upper end opening of the driven pile casing is provided, and when this locking portion is locked to the upper end opening of the cast pile casing, the GNSS mobile station moves to the upper end opening. A method of burying a cast-in-place pile casing, which is configured to be arranged at an upper center position. In the method of burying the casing for cast-in-place pile according to any one of claims 3 and 6, the cast-in-place is characterized in that the leg body is pivotally attached to the substrate and is provided so as to be oscillating in the vertical direction. How to bury a casing for piles. In the method of burying the cast-in-place pile casing according to any one of claims 3 and 6 , the locking portion is provided with a roller portion that abuts on the upper end opening edge portion of the cast-in-place pile casing. A method of burying a casing for cast-in-place piles, which is characterized by. The cast-in-place pile casing is buried in the ground by the method of burying the cast-in-place pile casing according to any one of claims 3 to 8, and subsequently, the soil in the cast-in-place pile casing is discharged. The cast-in-place pile is formed by providing a reinforcing bar in the drilling hole to be provided, and then pulling out the cast-in-place pile casing and placing concrete in the drilling hole to form the cast-in-place pile. Method.

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