JPH0786227B2 - Steel continuous wall construction error absorber - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for absorbing a construction error occurring between two partial continuous walls to be connected when constructing a continuous steel wall by a box sheet pile or the like.

[Conventional technology]

In recent years, instead of concrete continuous walls, box sheet piles etc. are used as underground continuous walls used in the basement of general buildings, underground tanks, underground malls, underground stations, etc. Steel continuous walls have been developed and are in use. In this steel continuous wall construction method, a groove is formed by digging the ground, a box sheet pile a shown in FIG. 6 is hung from above, and engaging portions b of adjacent box sheet piles are engaged with each other. In this way, a plurality of box sheet piles are sequentially built to form a continuous wall as shown in Fig. 7 (a), or as shown in Fig. 7 (b), two wide steel plates C, C are used. Steel wall e formed by connecting a plurality of ribs d
Is suspended so that the locking portions b of the adjacent wall-shaped bodies e are engaged with each other to form a continuous wall.

[Problems to be Solved by the Invention]

In the steel continuous wall construction method, the continuous wall to be formed is divided into some blocks in advance, and the box sheet pile a or the steel wall-shaped body e is sequentially engaged with each other by engaging adjacent locking portions. A partial continuous wall for each block is constructed, and finally the partial continuous walls of adjacent blocks are connected to each other to complete the steel continuous wall. In this case, the box sheet pile a or the steel wall-shaped body is used. Due to a construction error when the e is installed, a gap occurs between the locking portions at the ends of the two adjacent partial continuous walls, which makes it difficult to connect.

Conventionally, in order to absorb a construction error during the construction of such a steel continuous wall and smoothly connect two adjacent partial continuous walls, the pipe joint f shown in FIG. 8 (a) or the pipe joint f shown in FIG. 8 (b). The lap joint g shown in FIG. The pipe joint f has a cross section of "D", and a pipe h is welded to each protruding end. These pipes h usually have a diameter of 10 to 15 cm, and the locking parts b of two adjacent partial walls are inserted into each pipe h via slits in the longitudinal direction.
Connect two part continuous walls. Construction errors at the time of installation are absorbed in the space inside each pipe h. Also lap joint g
Is a shape in which two steel sheet piles are interconnected by ribs, and as shown in the drawing, the two projecting end portions of the two partially continuous walls adjacent to the sheet surface are overlapped to connect the two partially continuous walls. To do.

Since the conventional pipe joint f absorbs a construction error in the space inside the pipe h, the amount of the absorbed error is limited by the pipe diameter. However, increasing the diameter of the pipe hinders construction. There is a limit because it comes, and there is a problem that this cannot be absorbed if the construction error is large.
Further, since a slit is formed in the pipe, a step of plugging grout into this pipe after welding the continuous wall or welding a plate from the outside to close the slit is required to stop water. Therefore, there is a problem that the number of processes increases and the construction cost increases.

Further, the conventional lap joint g can absorb a large construction error as compared with the pipe joint f, but the member i in which the pipe is divided in half for stopping water is provided at both the projecting ends of the coupling g and the projecting end of the partially continuous wall. A welding process is required, which increases the number of processes and increases construction costs. Especially the height of the continuous wall is several
If the length is 10 meters, a scaffold corresponding to the height of the continuous wall must be built in the dug space for this welding work, which requires considerable labor and cost.

The present invention was made in order to solve the problems of the above-mentioned conventional construction error absorbing joints, and steel continuous wall construction without the need for extra steps such as welding of plate materials for water stoppage. It is intended to provide a construction error absorbing device for a continuous steel wall which can easily absorb a large construction error in the case of.

[Means for solving the problem]

The construction error absorbing device for a continuous steel wall of the present invention that achieves the above object has a pair of plate-shaped members provided at one end with locking portions that engage with locking portions of adjacent steel continuous walls. Rubber between the parts
A flexible water blocking member made of synthetic resin or the like is laid across.

[Action]

By engaging the locking portions of the respective ends of the two partial continuous walls to be connected with the locking portions of the construction error absorbing device of the present invention and suspending and installing the device, the device is made flexible. By the expansion and contraction of the member, it is possible to adjust the width of the device and the amount of deviation in the horizontal plane perpendicular to the width direction, and thus it is possible to easily absorb a construction error between the two partial continuous walls.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show an embodiment of the construction error absorbing device of the present invention. FIG. 1 is a perspective view showing a part of the construction error absorbing device, and FIG. 2 is a plan view thereof.

The construction error absorbing device 1 includes a pair of plate-shaped members 2 and 2 having a cross section of "D". The plate-like members 2 and 2 are formed with a pair of engaging portions 3 and 3 which engage with the engaging portions of the partial steel continuous wall to be connected to the protruding ends 2a and 2a on one side, and the protruding portions on the other side. Bent portions 2c, 2c are formed by bending one side of the end portions 2b, 2b inward at a predetermined angle. A flexible water blocking member 4 made of rubber, synthetic resin, or the like, which is bent inward so as to straddle the bent portions 2c, 2c, is fixed to the bent portions 2C, 2C by means of bolts 8 via pressing plates 5, 5. Has been done. By bending the ends of the projecting ends 2b, 2b, the bolt 8 for stopping the flexible water blocking member 4 does not project to the front surface of the device, thus facilitating the construction and making it flexible. Since the water blocking member 4 bends inwardly at an obtuse angle, the flexible water blocking member 4 can be prevented from fatigue compared to when the water blocking member 4 is bent at a right angle.
The life of can be extended by that much.

On the other side of the projecting end portions 2b, 2b, a concrete outflow prevention cloth 6 for preventing concrete from flowing out when the space formed between both wall surfaces of the post-installation device is filled with concrete. The protruding end 2 through the presser plates 7, 7.
It is fixed to b and 2b with bolts 9. In this embodiment, the flexible water blocking member 4 is provided only on one side where water blocking is required, and the other side where water blocking is not required is simply stretched with a cloth 6 for preventing concrete from leaking out, thereby reducing the manufacturing cost. Is decreasing.

Next, a construction method of the construction error absorbing device 1 will be described.

Before building the device 1, the width of the device 1 and the amount of deviation in a horizontal plane perpendicular to the width direction are adjusted according to the building size of the device 1 including the construction error between the two partial connection walls to be connected,
At this adjusted position, the pair of plate-shaped members 2 and 2 are temporarily fixed to each other at two or more upper and lower positions by appropriate detachable fasteners (not shown).

Next, the device 1 thus fixed by the fastening fittings in accordance with the build-up dimension is lifted up, and it is hung down to the build-up position so that each locking part 3 is engaged with the locking part of the partial continuous wall to be connected. Start building in this way.

As the installation of the device 1 progresses, the installation of the device 1 is completed by removing the fastener from the device 1 before continuing into the ground and continuing the installation. After the construction is completed, the interior space of the partially continuous wall and the interior space between the two outer walls formed by the plate-shaped members 2 of the device 1 are filled with concrete for water stoppage and reinforcement so as to be adjacent to each other. A continuous wall that is integral with the partial wall is completed.

FIG. 3 is a plan view showing another embodiment of the construction error absorbing device according to the present invention. In this embodiment, except that flexible water blocking members 4 are provided on both sides of the device 1, water blocking is performed on both sides of the device, and a bent portion 2c is not provided on the projecting end 2b. This is the same as the embodiment of FIGS. 1 and 2.

FIG. 4 is a plan view showing still another embodiment of the construction error absorbing device according to the present invention. In this embodiment, a pair of plate-shaped members 12, 12 having a U-shaped cross section are arranged back to back, and the engagement of the partial continuous walls to be connected to the projecting ends 12a, 12a of each plate-shaped member 12. Locking portions (13, 13) that engage with the stoppers are provided, and a bellows-shaped flexible water blocking member (14) is provided between the plate-shaped members (12, 12) approximately at the center.

FIG. 5 is a plan view showing still another embodiment of the construction error absorbing device according to the present invention. In this embodiment, a pair of plate-shaped members 22 having a substantially linear cross section is provided with locking portions 23, 23 for engaging with a locking portion of a partially continuous wall to be connected to one end of the plate-shaped members 22, 22. A flexible water blocking member having a bellows shape between the other ends of the strip members 22, 22.
Two sets of assemblies spanning 24 are arranged along both wall surfaces of the partial continuous wall, and by filling the inside of the device 1 after installation with concrete, a wall body integrated with the continuous wall is formed. .

〔The invention's effect〕

As described above, according to the present invention, a locking portion that engages with the locking portion of the continuous steel wall adjacent to one end portion of the pair of plate-shaped members is provided, and the other end portion is made of rubber. Since a flexible water blocking member made of synthetic resin is laid across, even if there is a large construction error between the two partial continuous walls to be connected, this can be easily absorbed by expansion and contraction of the flexible water blocking member. You can Further, since no extra process such as plate welding for water stopping is required unlike the conventional joint for absorbing construction error, the man-hour and construction cost can be reduced as compared with these conventional joints.

Further, according to the present invention, it is possible to construct a continuous wall integral with an adjacent partial wall by filling the concrete filling space with water for waterproofing and reinforcement after the completion of the construction.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the construction error absorbing device of the present invention, FIG. 2 is a plan view of the same embodiment, and FIGS. 3 to 5 are other embodiments of the construction error absorbing device of the present invention. A plan view showing an example, FIG. 6 is a perspective view showing a box sheet pile, FIG. 7 is a plan view schematically showing a method of constructing a continuous wall, and FIG. 8 is a plan view schematically showing a conventional construction error absorbing device. It is a figure. 1 ... Construction error absorbing device 2, 12, 22 ... Plate-shaped member 3, 1
3, 23 ... Locking part, 4, 14, 24 ... Flexible water blocking member

Front page continuation (72) Inventor Takao Yamada 7-32-1, Higashi Oizumi, Nerima-ku, Tokyo Sankopo Higashi Oizumi 102 (72) Inventor Yoshinori Asanuma 508 Waseda Tsurumaki-cho, Shinjuku-ku, Tokyo (56) References 60-139832 (JP, U) Actual public Sho 64-4915 (JP, Y2)

Claims (5)

[Claims] 1. A pair of locking portions for engaging with locking portions of continuous steel walls respectively adjacent to one projecting end portion of a pair of plate-shaped members having a cross section of "D". , A flexible waterproof member made of rubber, synthetic resin, or the like is provided on both sides between the other projecting ends of the pair of plate-shaped members, and the flexible waterproof function is provided between both sides of the plate-shaped members and on both sides thereof. A construction error absorbing device for a continuous steel wall that forms a space for filling concrete between members. 2. A pair of locking portions for engaging with the locking portions of the continuous steel wall respectively adjacent to one projecting end portion of the pair of plate-shaped members having a cross section of "D". , A flexible water blocking member made of rubber, synthetic resin or the like is provided on one side between the other projecting ends of the pair of plate-like members, and concrete outflow prevention is provided on the other side between the other projecting ends. Absorption of construction errors on a continuous steel wall by straddling a cloth and forming a space for filling concrete between both sides of each plate member and between the flexible water blocking member and the concrete outflow prevention cloth. apparatus. 3. A construction error absorption for a continuous steel wall according to claim 1, wherein a portion of the other protruding end portion to which the flexible water blocking member is mounted is bent inward at a predetermined angle. apparatus. 4. A pair of locking portions for engaging with the locking portions of the continuous steel wall respectively adjacent to one projecting end portion of the pair of plate-shaped members having a linear cross section, Flexible water blocking members made of rubber, synthetic resin, or the like are laid on both sides between the other protruding ends of the pair of plate-shaped members, and the pair of plate-shaped members are arranged in parallel in two rows. Error absorbing device for a continuous steel wall in which a space for concrete filling is formed between both sides of a strip-shaped member and between the flexible water blocking members on both sides. 5. The steel continuous wall construction error absorbing device according to claim 4, wherein a concrete outflow preventing cloth is provided in place of one of the flexible water blocking members.