JPH0932015A - Method of laying water stop board and water stop board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water stop board which can ensure a high water stopping ability and which is inexpensive, and a method of laying it. SOLUTION: An L-like steel bar 3 is embedded in preceding concrete 5. An S-like water stop board 7 is welded to the L-like steel bar 3. A stud dowel 13 is provided at the top end of the water stop 7, and sand 17 is filled above the water stop 7, and a back-up member 15 is laid below the S-like water stop 7. Then, post-placed concrete 19 is placed. Since the water stop 7 is fixed at its lower end to the L-like steel bar 3, and is embedded at its upper end in the post-placed concrete 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stop plate installation method and a water stop plate at a joint in a vertical direction of an underground structure such as an underground tank or a shaft where high water pressure acts.

[0002]

2. Description of the Related Art Generally, in underground structures such as underground tanks and shafts where high water pressure acts, a large amount of groundwater flowing into the interior is problematic for safe operation of the equipment. Is being prevented. Take, for example, an underground tank. FIG. 5 is a schematic configuration diagram of the underground tank 101. In FIG. 5, 103 is the ground surface, 105 is the water table,
107 is a side wall and 109 is a bottom plate. A hinge portion 111 is provided at a joint portion between the side wall 107 and the bottom slab 109 so as not to restrain the rotational deformation from a stressed surface. Underground tank 10
Since 1 is built deep underground, 5 in the hinge part 111 etc.
A water pressure of ~ 6 kgf / cm2 may act. For this reason,
A water blocking plate 113 is provided between the side wall 107 and the bottom plate 109.

FIG. 6 shows a water blocking plate 113 made of rubber. The water blocking plate 113 has a flat plate shape, and a cylindrical portion 115 is provided at both ends thereof, and a projection 117 is provided. The water blocking plate 113 has a portion buried in concrete as long as possible, and a water flowing amount is lengthened to suppress the amount of water leakage. FIG. 7 shows a water blocking plate 113a made of metal, and this water blocking plate 113a is composed of a curved portion that absorbs displacement and a flat portion embedded in concrete.

[0004]

However, such a conventional water stop plate has the following problems. (1) Water leakage has not been completely eliminated due to high water pressure or due to deposits on the concrete embedding part of the water stop plate during the standing period during construction, as shown in Fig. 5. A large number of water stop plates 113 must be installed. (2) Water stop plate 1
Since the molds are separately installed on the upper and lower sides of 13 and the concrete is placed, the mold work becomes large-scale and the cost is increased. (3) Since the water blocking plate 113 is installed horizontally at the joints in the vertical direction, it is difficult for concrete to wrap around the underside of the water blocking plate 113, and the water blocking function is deteriorated. (4) Since the metal water blocking plate 113a shown in FIG. 7 has a complicated shape, it is formed by press working with a die, and thus requires a considerable cost.
Further, it is necessary to weld the water blocking plates 113a to each other in the circumferential direction, and since the shapes are complicated, face-to-face matching is difficult, resulting in poor welding. (5) Since the water stop plate 113 must be arranged before the concrete is poured, the workability is poor.

The present invention has been made in view of the above problems, and an object thereof is to provide a water stop plate and a method of installing the water stop plate which can secure high water stoppage and are inexpensive. Especially.

[0006]

In order to achieve the above-mentioned object, a first aspect of the present invention is to provide a shape steel in the concrete to be cast in advance, and a lower end of the water stop plate having an anchor at the upper end. The method for installing a water stop plate, comprising: a step of attaching the part to the shaped steel so that an upper end portion thereof is separated from the concrete; and a step of placing a post-cast concrete so as to wrap the water stop plate. is there. A second invention is a water stop plate having an S-shaped cross section. A third invention is a water stop plate having a Z-shaped cross section.

The lower end of the water stop plate is fixed to the shaped steel, and the upper end is embedded in the post-cast concrete, and the water stop plate stops the water.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. A procedure for installing the water blocking plate 7 according to the first embodiment will be described with reference to FIGS. 1 to 3. The water stop plate 7 according to the first embodiment is an S-shaped metal water stop plate having a gentle cross section.

As shown in FIG. 1, a mold 1 is installed, and an L-shaped steel 3 is attached to the preceding concrete 5 so as to be in contact with the mold 1.
And the preceding concrete (preceding concrete) 5 is placed using this form 1. Next, as shown in FIG. 2, when the preceding concrete 5 is solidified, the form 1 is removed, and the lower end of the water stop plate 7 having an S-shape with a gentle cross section is set to L.
Weld to shaped steel 3. 9 is a welded part. Then, a caulking material 11 for stopping water is provided below the L-shaped steel 3. Anchor hardware such as a stud dowel 13 is installed on the top of the water stop plate 7.

Next, as shown in FIG. 3, a backup material 15 is arranged below the water blocking plate 7, and sand 17 is placed above the water blocking plate 7.
Is placed and the post-cast concrete 19 is placed. In addition,
This S-shaped water stop plate 7 is deformed in the horizontal direction,
Suitable for extending in the vertical direction.

According to the water stop plate 7 according to the present embodiment, the lower end of the water stop plate 7 is welded and the upper end thereof is the post-cast concrete 1.
Since it has a structure embedded in 9, it is possible to surely stop water even in vertical joints. Further, the backup material 15 is arranged on the side where the water pressure acts, and the sand 17 is arranged on the opposite side.
Since the deformation of the water stop plate 7 is not constrained and the upward force due to the water pressure can be transmitted to the post-cast concrete 19 through the sand 17, the water stop can be ensured even under high water pressure. Moreover, since the L-shaped steel 3 is arranged inside the mold, the mold is not divided. Since the water stop plate 7 has a simple shape, press work with a mold is not necessary, and since the water stop plate 7 can be simply bent, the manufacturing cost of the water stop plate 7 becomes very low. Further, since the water blocking plate 7 is welded to the L-shaped steel 3 provided on the solidified concrete 5, the workability becomes very good as compared with the conventional water blocking plate 113.

FIG. 4 shows a Z-shaped water stop plate 35 according to the second embodiment. The installation method of this Z-shaped water stop plate 35 is the same as that of the S-shaped water stop plate 7. This Z-shaped water stop plate 35 is applied when the deformation direction is separated in the horizontal direction and is expanded and contracted in the vertical direction. In FIG. 4, 31 is preceding concrete, 33 is L-shaped steel, 37 is stud dowel, 39 is sand, 41 is backup material, and 43 is post-cast concrete. With this water stop plate 35, the same effect as that of the water stop plate 7 according to the first embodiment can be obtained.

Although the L-shaped steels 3 and 33 are embedded in each of the above-described embodiments, the U-shaped steels and flat steels may be provided instead of the L-shaped steels. Further, the shape of the water blocking plate may be a shape other than the S-shape and the Z-shape. Further, although the stud dowels 13 and 37 are installed at the time of construction, the stud dowels 13 and 37 may be attached to the water stop plates 7 and 35 at the stage of manufacturing at the factory.

[0014]

As described above in detail, according to the present invention, it is possible to provide a water stop plate and a method of installing the water stop plate which can secure high water stoppage and are inexpensive.

[Brief description of drawings]

FIG. 1 is a diagram showing a procedure for installing a water stop plate 7 according to a first embodiment.

FIG. 2 is a diagram showing a procedure for installing the water blocking plate 7 according to the first embodiment.

FIG. 3 is a diagram showing a procedure for installing the water blocking plate 7 according to the first embodiment.

FIG. 4 is a view showing a water blocking plate 35 according to a second embodiment.

FIG. 5 is a schematic configuration diagram of a main part of the underground tank 101.

FIG. 6 is a view showing a conventional water blocking plate 113.

FIG. 7 is a view showing a conventional water blocking plate 113a.

[Explanation of symbols]

 3, 33 ………… L-shaped steel 5, 31 ………… Preceding concrete 7, 35 ………… Water stop plate 13, 37 ………… Stud dowel 15, 41 ………… Backup material 17, 39 ………… Sand

Claims (3)

[Claims] 1. A step of providing a section steel to concrete to be cast in advance, and a bottom end of a water stop plate having an anchor at an upper end thereof is provided to the section steel so that the top end is separated from the concrete. And a step of placing post-cast concrete so as to wrap the water blocking plate. 2. The water stop plate according to claim 1, wherein the water stop plate has an S-shaped cross section. 3. The water stop plate according to claim 1 has a cross section of Z.
A water stop plate characterized by a letter shape.