JPH0421871Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> This invention constructs an underground continuous wall as a permanent structure by sequentially connecting unit walls made of concrete poured underground. The present invention relates to improvements in wall-to-wall joints that are used by being buried between the unit walls to firmly connect the unit walls.

<<Prior Art>> When attempting to construct an underground continuous wall as is known in the art, as illustrated in Fig. 7, the preceding element groove A shown in Fig. After erecting B and joint box C, and erecting inter-wall joint D adjacent to this, either erecting the preceding element reinforcing bar E, or
D and E are erected at the same time as one unit, and then the concrete of the preceding element is poured to form the unit wall F.

By the way, in the conventional wall-to-wall joint D, as can be seen from the front view of FIG. By planting, a partition steel plate D3 having a square cross section is formed, and furthermore, on the inner surface of each of the longitudinal flange plates D2, a loop striation having a U shape or the like is formed, the base end D4 of which is fixed by welding means. A required number of D5, D5, .

Therefore, after the unit wall F is formed as described above, the locking pipe B is pulled out as shown in FIG. By doing so, the pair of loop reinforcements on one side of the wall-to-wall joint D are exposed on the element slot A1 side, and the trailing element reinforcing bar cage E is placed in the same slot A1.
1, the succeeding unit wall F1 will be made continuous by placing concrete for the succeeding element.

However, when using the above conventional wall joint,
Since the loop reinforcements D5, D5, .

Therefore, in order to solve the above-mentioned difficulties, the one shown in Fig. 6 is also used, but its configuration is such that loop reinforcements D5, D5... are provided on the outer and inner surfaces of the longitudinal flange plate D2, respectively. While welding the end portion D4, these loop reinforcements D5, D5...
are arranged one after another so as to overlap each other in the wall thickness direction.

In this case, the strength is certainly improved compared to the one in Figure 5 due to the welding position and overlapping configuration of the loop muscle D5 as described above, but it cannot be said that a satisfactory strength has been obtained yet. In addition, due to the welding position of the base end, the loop reinforcements cannot be arranged in one plane, which impedes concrete filling and reduces the strength of the underground continuous wall. It may also cause you to do so.

<<Problems to be solved by the invention>> In view of the above-mentioned conventional problems, the present invention fixes vertical reinforcing bars at appropriate positions of the above-mentioned rows of loop bars and connects them in an integral manner. In addition to greatly improving the strength of the loop bars, it also prevents them from interfering with concrete filling, and also prevents them from getting caught in the joint box C during erection, and from colliding with the loop bars when erecting element reinforcing bars. The purpose is to prevent damage and deformation caused by

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a partition steel plate in which each pair of longitudinal flange plates is installed perpendicularly from both the front and back sides of a vertically long board. A loop muscle group is formed by arranging a required number of loop muscles whose proximal ends are fixed in a row in a longitudinal plane on one side of the longitudinal flange plate, and each loop in each of these loop muscle groups The purpose of the present invention is to provide a wall-to-wall joint for an underground continuous wall in which the tips of the bars are integrally connected by fixing vertical reinforcing bars.

《Effect》 The individual loop reinforcements are connected together by the longitudinal reinforcing bars, and since the connection position is the tip of the loop reinforcement, the entire loop muscle group resists external force. The strength of the reinforcement is greatly increased, and since the loop bars are placed within the vertical running plane, there is no problem with concrete pouring, and the vertical installation of the vertical reinforcing bars allows for easy construction. During this process, the loop reinforcements are less likely to catch or collide with other members, improving the efficiency of construction work, and preventing damage, deformation, etc. due to such collisions.

《Example》 To describe the present invention in detail with reference to an illustrated example, as shown in Figs. 1 to 3, a partition steel plate 1 formed of an iron plate or the like has a vertically elongated substrate 1a and both sides thereof. The longitudinal flange plates 1b, 1b, 1b, 1b are set perpendicularly to each other in pairs to form a V-shaped cross section, and the base ends 2a of the loop reinforcements 2, 2... are connected to each longitudinal flange plate. Board 1b, 1b, 1
A loop reinforcement group 3 is fixed to one side surface of b, 1b by welding means, whereby these loop reinforcements 2, 2... are successively arranged in a row next to each other in a longitudinal plane.
The formation of a, 3b, 3c, and 3d is the same as in the conventional one.

Here, the loop lines 2, 2, . is a vertical straight line, and the loops 2, 2, etc. in Figure 3 are U-shaped, and of course their tips are longer vertical lines than those in Figure 2, and the base The end portions 2a are preferably welded to the inner surfaces of the longitudinal flange plates 1b, 1b, 1b, 1b rather than the outer surfaces as shown in the illustrated example.

In the present invention, the above loop muscle groups 3a, 3b, 3
c, 3d, the tips 2b of the loop reinforcements 2, 2, etc., which are arranged above and below, are integrally connected by fixing the vertical reinforcing bars 4a, 4b, 4c, and 4d, which are straight, by welding means. It is.

At this time, it is desirable to weld along the outside of the tip 2b, and in the case of FIG.
In the arc-shaped part shown in b, and in the mountaintop part in Figure 2,
In Fig. 3, it is preferable to fully weld the long straight part, but other parts may be used as long as it is the tip 2b. It is also possible to weld a little closer to the proximal end 2a than the arcuate portion or linear portion.

Therefore, in order to use the above-mentioned wall joint, the fourth
As shown in the figure, the general construction method described above in Figure 7 will be followed, and
After installing the locking pipe B and the joint box C in the preceding element slot A, the wall-to-wall joint will be installed.

At this time, the loop bars 2, 2... will be inserted downward into the cut grooves of the joint box C, but since there are longitudinal reinforcing bars 4a, 4b, the loop bars 2, 2...
2... will not get caught in the joint box C and hinder its descent, nor will it be damaged or deformed by the shock caused by impact, and this will help the work to be carried out smoothly. Not only will the vertical reinforcing bars 4c and 4d exert a similar downward movement when the preceding element reinforcing bar basket E is erected as shown in d, but also when the joint box C is pulled out in the figure f, and when the joint box C is pulled out in the same way as shown in the figure g, The same applies when the element reinforcing cage E1 is erected.

<<Effect of the invention>> The present invention is constructed as described above, and includes a loop muscle group in which the tip portions 2b of the loop muscles 2, 2... are connected by vertical reinforcing bars 4a, 4b, 4c, and 4d. Since 3a, 3b, 3c, and 3d are formed, it is as if they were integrated into a truss shape, and instead of each individual loop reinforcement resisting external force, all the loop reinforcements are integrated together with the longitudinal reinforcement. As a result, the strength of the joint can be greatly improved.

In addition, since the shape is simple and the loop reinforcements are arranged within the vertical installation plane, concrete filling is performed smoothly, and a decrease in joint strength due to insufficient concrete filling can be prevented.

Furthermore, with this invention, the vertical reinforcing bars act as a kind of guide during erection and pulling out, allowing the work to be carried out quickly. Then the problem will disappear.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of one embodiment of the wall-to-wall joint according to the present invention showing how it is used; FIGS. 2 and 3 are partial perspective views showing different examples of the same joint; FIGS. 4 a to h
1 is an explanatory plan view showing the process order when constructing an underground continuous wall using the same joint as above, FIG. 5 and FIG.
Figures a to h are explanatory plan views of process steps when constructing an underground continuous wall using the wall-to-wall joint in Figure 5. 1...Partition steel plate, 1a...Vertical board, 1b...
Longitudinal flange plate, 2...Loop muscle, 2a...Proximal end, 2b...Tip, 3a, 3b, 3c, 3d...
...Loop muscle group, 4a, 4b, 4c, 4d... Vertical reinforcing bars.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Regarding a partition steel plate in which a pair of longitudinal flange plates are planted perpendicularly from both the front and back sides of a vertically long board,
A loop muscle group is formed by arranging a required number of loop muscles whose proximal ends are fixed on one side of each of the longitudinal flange plates in a longitudinal plane,
A wall-to-wall joint for an underground continuous wall in which the tips of each loop reinforcement in each of these loop reinforcement groups are connected together by fixing vertical reinforcing bars. (2) The base end of the loop reinforcement is fixed to the inner surface of the longitudinal flange plate of the partition steel plate, and the longitudinal reinforcement is fixed to the outer surface of the tip of the loop reinforcement, as described in claim 1 of the utility model registration. Inter-wall joints for underground continuous walls. (3) The base end of the loop reinforcement is fixed to the inner surface of the longitudinal flange plate of the partition steel plate, and the longitudinal reinforcement is fixed to the tip end surface of the tip of the loop reinforcement, as stated in claim 1 of the utility model registration claim. Inter-wall joints for underground continuous walls.