JPH0427009A - Error absorber for construction of continuous steel wall - Google Patents

Abstract

PURPOSE:To make the absorption of error easier by a method in which a flexible water stopper of rubber or synthetic resin is placed between the other ends of paired plate parts whose one ends have couplers to connect with the couplers of the adjacent continuous steel walls. CONSTITUTION:Couplers 3 to connect with the couplers of adjacent continuous steel walls are formed on the projected ends 2a of plate parts 2. A flexible water stopper 4 of rubber or synthetic resin, having an inwardly curved form, is set through press plates 5 between the bends 2c on the other projected ends 2b of the plates 2 and fixed by bolts 8. A concrete flow-preventing cloth 6 is fixed through press plate 7 to the other sides of the ends 2b by a bolt 9. The couplers 3 are connected between two continuous walls to be connected and set by hanging down while correcting their biased positions by the water stopper 4. The cost of construction can thus be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for absorbing construction errors that occur between two partial continuous walls to be connected when constructing a continuous steel wall using box sheet piles or the like.

[Conventional technology]

In recent years, Hox sheet piles, etc. have been used instead of concrete-based continuous walls as underground continuous walls used as walls of general buildings, underground tanks, underground systems, underground stations, etc., and as the foundation structure of general buildings, bridges, and other structures. Continuous steel walls have been developed and are in use. In this steel continuous wall construction method, the ground is excavated to form a groove, box sheet pile a shown in Fig. 6 is suspended from above in this groove, and the locking parts of adjacent box sheet piles are engaged with each other. Either a plurality of box sheet piles can be erected one after another to form a continuous wall as shown in Figure 7(a), or two wide steel plates C and C can be constructed as shown in Figure 7(b). A steel wall-like body e formed by connecting a plurality of ribs d
hanging from the adjacent wall. A continuous wall is formed by engaging the locking portions of each other with each other.

[Problems to be solved by the invention]

In the steel continuous wall construction method, the continuous wall to be formed is divided into several blocks in advance, and box sheet piles a or steel wall bodies e are sequentially connected to each other in each block by engaging adjacent locking parts. Partial continuous walls are constructed for each block, and finally, the partial continuous walls of adjacent blocks are connected to each other to complete a steel continuous wall. In this case, a box sheet pile a or steel wall-like structure is constructed. Due to construction errors when constructing the wall, a misalignment occurs between the locking portions at each end of two adjacent partially continuous walls, making it difficult to connect.

Conventionally, in order to absorb construction errors during construction of such continuous steel walls and to smoothly connect two adjacent partial continuous walls, pipe joints f shown in Fig. 8 (a) or pipe joints f shown in Fig. 8 (b) were used. A lap joint g shown in the figure is used. The pipe joint f has a cross-sectional shape, and a pipe h is welded to each projecting end.

These pipes h usually have a diameter of 10 to 15 cm, and two continuous partial walls can be connected by inserting the locking parts of the two adjacent partial walls into each pipe h through the longitudinal slits. Connecting. Construction errors during erection are absorbed in the space within each pipe h. In addition, the lap joint g has a shape in which two steel sheet piles are ribbed and interconnected, and as shown in the figure, the two parts can be separated by overlapping the respective protruding ends of two partial continuous walls adjacent to the plate surface. It connects continuous walls.

Since the conventional pipe fitting f described above absorbs construction errors in the space inside the pipe h, the amount of errors that can be absorbed is limited by the pipe diameter, or increasing the pipe diameter poses a problem in construction. There is a limit to this, and if there are large construction errors, there is a problem in that they cannot be absorbed.

Furthermore, since the pipe has a slit formed in it, in order to stop water, it is necessary to fill the slit with grout or weld a plate from the outside after connecting the continuous wall. Therefore, there is a problem that the number of steps increases and the construction cost increases.

In addition, the above-mentioned conventional lap joint g can absorb larger construction errors than the pipe joint f, but in order to stop water, a member i made by cutting the pipe in half is used at both ends of the joint g and at the end of the partially continuous wall. A welding process is required, which increases the number of steps and construction costs. In particular, when the height of the continuous wall is several tens of meters, it is necessary to construct scaffolding corresponding to the height of the continuous wall in the excavated space for this welding work, which requires considerable effort and cost. It turns out.

The present invention has been made in order to solve the problems of the conventional joints for absorbing construction errors as described above. It is an object of the present invention to provide a construction error absorbing device for a continuous steel wall that can easily absorb large construction errors during construction.

[Means to solve problems]

A construction error absorbing device for a continuous steel wall according to the present invention that achieves the above object includes a pair of plate-shaped members each having a locking portion at one end that engages with a locking portion of an adjacent continuous steel wall. Rubber between the parts
It is constructed by straddling a flexible water-stopping member made of synthetic resin or the like.

[Operation] By engaging the locking portions at each end 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 erecting the device, the device can be installed. By expanding and contracting the flexible water-stopping member, the width of the device and the amount of deviation in the horizontal plane perpendicular to the width direction can be adjusted, thereby easily absorbing construction errors between the two partially continuous walls.

〔Example〕

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

1 and 2 show one embodiment of the construction error absorbing device of the present invention, FIG. 1 is a partially cut away perspective view thereof, and FIG. 2 is a plan view thereof.

The construction error absorbing device 1 includes a pair of plate-like members 2.2 having a cross section in the shape of a square. The plate-shaped member 2.2 has a pair of locking portions 3.3 formed on one of the protruding ends 2a, 2a, which engage with locking portions of a partial steel continuous wall to be connected, and the other protrusion. One side of the end portions 2b, 2b is bent inward at a predetermined angle to form bent portions 2c, 2c. This bent part 2
A flexible water-stopping member 4 made of rubber, synthetic resin, etc. and curved inwardly so as to span between c and 20 is fixed to the bent portions 2C and 2C with bolts 8 via a holding plate 5.5. By bending the ends of the protruding ends 2b, 2b,
The bolts 8 that fasten the flexible water-stopping member 4 do not protrude from the front of the device, making installation easier, and since the angle at which the flexible water-stopping member 4 curves inward is an obtuse angle, it can be easily curved. Compared to the case where the angle is a right angle, fatigue of the flexible water stop member 4 can be prevented and the life of the flexible water stop member 4 can be extended accordingly.

Further, on the other side of the protruding ends 2b, 2b, a concrete outflow prevention cloth 6 is provided to prevent concrete from flowing out when filling the space formed between both walls of the device after erection. are fixed to the protruding ends 2b, 2b with bolts 9 via a presser plate 7.7. In this embodiment, the flexible water-stopping member 4 is provided only on one side where water-stopping is required, and the other side where water-stopping is not required is simply covered with cloth 6 to prevent internal concrete from flowing out, thereby reducing manufacturing costs. is decreasing.

Next, a construction method of this construction error absorbing device 1 will be explained.

Before erecting the device 1, adjust the width of the device 1 and the eccentric position in the horizontal plane perpendicular to the width direction according to the erected dimensions 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 2.2 are temporarily fixed at two or more upper and lower force points using appropriate detachable fasteners (not shown).

Next, the device 1 fixed with the fasteners in accordance with the construction dimensions is lifted up and suspended at the construction position, and each locking portion 3 engages with the locking portion of the partial continuous wall to be connected. In this way, construction begins.

As the erection of the installation W1 progresses, the fasteners are removed from the device 1 before they go underground, and the erection of the device 1 is completed by continuing the erection. After construction is completed, the internal space of the partially continuous wall and the internal space between the two external walls formed by the plate member 2.2 of the device 1 are filled with concrete for water stoppage and reinforcement. A continuous wall that is integrated 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. This embodiment has the exception that flexible water-stopping members 4 are provided on both sides of the device 1 to stop water on both sides of the device, and that a bent portion 2c is not provided on the protruding end portion 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 parts 12 and 12 having a U-shaped cross section are arranged back to back, and a partial continuous wall to be connected to the protruding ends 12a, 12a of each plate-shaped member]2 is used. A locking portion 13 that engages with a locking portion of the locking portion 13.
13 is provided, and a bellows-shaped flexible water stop member 14 is provided straddling the substantially central portions of the plate members 12 and 12.

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 locking portion 23.2 engages with a locking portion of a partially continuous wall to be connected to one end of a pair of plate-like members 22.22 having a substantially linear cross section.
3, and two sets of assemblies in which a bellows-shaped flexible water stop member 24 is straddled between the other ends of the plate members 22 and 22 are arranged along both wall surfaces of the partially continuous wall, After construction, the inside of the device 1 is filled with concrete to form a continuous wall and a wall body.

〔Effect of the invention〕

As described above, according to the present invention, one end of a pair of plate members is provided with a locking portion that engages with a locking portion of an adjacent continuous steel wall, and the other end is provided with a rubber Since a flexible water-stopping member made of synthetic resin or the like is installed across the wall, even if there is a large construction error between two partially continuous walls to be connected, this can be easily absorbed by the expansion and contraction of the flexible water-stopping member. I can do it. Further, unlike conventional joints for absorbing construction errors, there is no need for any extra steps such as plate welding to stop water, so the number of man-hours and construction costs can be reduced compared to these conventional joints.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the construction error absorbing device of the present invention, 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. FIG. 8 is a plan view schematically showing a conventional construction error absorbing device. 1... Construction error absorption device, 2.12.22... Plate member, 3.13.23... Locking part, 4.14.24.
・Flexible water stop member

Claims (6)

[Claims] (1) A flexible water stop member made of rubber, synthetic resin, etc., between the other end of a pair of plate-shaped members, each of which has a locking portion at one end that engages with a locking portion of an adjacent continuous steel wall. A construction error absorption device for continuous steel walls built over . (2) A pair of locking portions each of which engages with a locking portion of an adjacent steel continuous wall is provided at one protruding end of a pair of plate members having an “E”-shaped cross section; A construction error absorbing device for a continuous steel wall comprising a flexible water-stopping member made of rubber, synthetic resin, etc., straddled on at least one side between the other protruding ends of a pair of plate-like members. (3) The construction error absorbing device for a steel continuous wall according to claim (2), further comprising a concrete outflow prevention cloth straddling the other side between the other protruding ends. (4) Claims (1) to (3) wherein a portion of the other protruding end to which the flexible water stopper is attached is bent inward at a predetermined angle.
A construction error absorbing device for a continuous steel wall according to any one of the above. (5) A pair of locking parts that engage with locking parts of the continuous steel wall adjacent to each protruding end of a pair of plate-shaped members having a "U"-shaped cross section are provided, and each plate A construction error absorbing device for a continuous steel wall, which is constructed by installing a flexible water-stopping member made of rubber, synthetic resin, etc. between two shaped members. (6) Claim (
1) Construction error absorbing device for continuous steel walls as described above.