JP2854457B2 - Water stop structure and water stop method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a structure for stopping water between a slab and an inner wall of a double wall constructed in an underground part of a civil engineering construction.

[0002]

2. Description of the Related Art A conventional double wall water stopping structure is a structure in which a slab convex portion located below an inner wall is higher than a slab plane portion and a groove is formed between the outer wall and the slab convex portion. Further, if necessary, a water stopping material can be provided between the inner wall and the slab convex portion, and the water stopping is performed by such a structure.

FIGS. 3 and 4 are cross-sectional views of a conventional double wall waterproof structure.
Shown in To explain this manufacturing process, first, the underground (4)
A slab form (7) is fixed to the underground and the reinforcing bars via support members (8A, 8B), and a concrete material (1A) is cast (FIG. 3). ). At this time,
The slab convex portion (1a) is made higher than the slab plane portion (1b) in order to be a water blocking wall. After the concrete material has hardened, as shown in FIG. 4, the slab form (7) and the support
(8A, 8B) is removed, and then the outer wall (6) is formed along the wall surface of the underground (4). A mold is also used when forming the outer wall (6). In addition, a water blocking material (9) and an inner wall (2) may be provided on the slab protrusion (1a) as necessary.

[0004]

However, in this method, when the slab (1B) is formed, the slab form (7)
And their supporting materials (8A, 8B) must be temporarily provided and removed after the concrete material has hardened,
This required considerable effort. In addition, the slab is formed by one-time concrete casting, and the slab convex portion (1a) is formed by its own weight until the concrete material is hardened.
Is easily lowered to the height of the slab plane portion (1b). Many man-hours were required to manage such deformations. An object of the present invention is to improve the above-described workability, reduce the number of steps required for water stoppage, and sufficiently stop water stoppage.

[0005]

SUMMARY OF THE INVENTION The present invention provides a slab having a substantially flat surface, an outer wall fixed on the slab, an inner wall located on the slab inside the outer wall, and an inner wall and an outer wall. And a water stop plate partially buried in the slab.

Further, according to the present invention, there is provided a step of casting a concrete material so that a surface thereof is substantially flat, a step of embedding a part of a water stop plate in the concrete material before the concrete material hardens, and The present invention relates to a water stopping method including a step of forming a slab by curing a concrete material, a step of providing an outer wall on the slab, and a step of providing an inner wall inside the outer wall on the slab.

[0007]

FIG. 2 shows a manufacturing procedure of a water stopping structure according to the present invention. First, a reinforcing bar (5) is assembled on a plane under the ground (4), and a concrete material (1A) is cast therein (FIG. 2).
(A)). Next, before the concrete material (1A) hardens, a part of the water blocking plate (3) is buried (FIG. 2).
(B)). Further, as shown in FIG. 2C, the concrete material (1A) is hardened, and a slab (1B) having a substantially flat surface is formed. Next, an outer wall (6) in contact with the underground (4) is formed on the slab (1B). A mold is used to form the outer wall (6). Finally, as shown in FIG. 1, an inner wall (2) is formed on the slab (1B).
If necessary, a filler (10) is provided between the water blocking plate (3) and the inner wall (2).

[0008] The water stop structure as shown in Fig. 1, Figs.
According to the waterproofing method shown in FIG. 3 (c), the buried portion (3b) of the waterproof plate (3) is embedded and fixed in the slab (1B), and the exposed portion (3a) of the waterproof plate (3). But the slab (1
Exposed on the surface of B). Therefore, groundwater that has entered from between the outer wall (6) and the slab (1B) is blocked by the exposed portion (3a) of the water stop plate (3). Therefore, good water stopping performance can be maintained as in the conventional example shown in FIG.

Moreover, there is no need for a mold (7) for forming a slab or a support (8A, 8B) as in the conventional example. In addition, since the slab protrusion (1a) is not formed, the slab protrusion (1a) is formed after the concrete is molded.
No special process for preventing deformation due to gravity in a) is required. Therefore, the work at the time of the enforcement is simple and the number of steps is small.

Next, a preferred example of the water blocking plate (3) will be specifically described. The length of the buried portion (3b) of the water blocking plate (3) buried in the slab (1B) is preferably 1 to 10 cm. If the thickness is less than 1 cm, the water stop plate (3) itself cannot stand on its own, and if it exceeds 10 cm, the strength of the slab is reduced. The height of the exposed portion (3a) of the water blocking plate (3) is suitably 5 to 30 cm. If this is less than 5 centimeters, the height is insufficient to function as a water blocking wall, and 30
If the centimeter is exceeded, the cost will only increase and the water stopping function will not change. As a material of the water blocking plate (3), an iron plate, a plastic plate, a resin plate, a rubber plate, a wooden plate, a concrete PC plate, or the like, or a combination thereof may be used. If necessary, a filler (10) is inserted between the water blocking plate (3) and the inner wall (2). In this case, the filler (10) prevents the water droplets that have condensed on the inner wall (2) from flowing down onto the slab (1B).
Can be prevented. At this time, the filler (10)
It comes into contact with both the water stop plate (3) and the inner wall (2).

[0011]

According to the present invention, a part of the water stop plate is embedded in the slab between the inner wall and the outer wall, and the water stop plate is fixed. Therefore, water that has entered between the outer wall and the slab is blocked by the exposed portion of the water stop plate from the slab.
Therefore, good water stopping performance can be maintained.

Moreover, by embedding a part of the water stop plate in the concrete material before the concrete material hardens,
Can stop water. Therefore, when forming the slab as in the conventional example, it is not necessary to provide a water stopping projection on the slab itself. Therefore, when placing concrete,
There is no need for a mold for forming such a protrusion or a support for the mold. Further, since such a convex portion is not formed, a special process for preventing the convex portion from being deformed by gravity before the concrete is hardened is not required. Therefore, the work at the time of the implementation is simple, and the number of steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a double-wall water stopping structure according to an embodiment of the present invention.

2 (a), (b) and (c) are cross-sectional views of the underground structure during various steps of the method of the present invention, respectively.

FIG. 3 is a cross-sectional view showing a state immediately after a concrete material (1A) is cast in a conventional water stopping method.

FIG. 4 is a cross-sectional view of a conventional double wall waterproof structure.

[Description of Signs] 1A concrete material 1B slab 1a slab convex part 1b slab plane part 2 inner wall 3 water stop plate 3a exposed part 3b buried part 4 underground 5 reinforcement 6 outer wall 7 slab formwork 8A, 8B support material 9 water stop Material 10 Filler

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 31/02 E02D 29/00

Claims (4)

(57) [Claims] 1. A slab having a substantially flat surface, an outer wall fixed on the slab, an inner wall located on the slab inside the outer wall, and between the inner wall and the outer wall, and a part of the slab. And a water stop plate embedded with the water stop plate. 2. The water stopping structure according to claim 1, wherein a filler in contact with both the water stopping plate and the inner wall is fixed. 3. A step of pouring the concrete material so that the surface is substantially flat, a step of embedding a part of the waterproof plate in the concrete material before the concrete material hardens, and A water stopping method comprising a step of forming a slab by curing, a step of providing an outer wall on the slab, and a step of providing an inner wall inside the outer wall on the slab. 4. The water stopping method according to claim 3, wherein after the inner wall is provided, a filler is fixed so as to be in contact with both the water stopping plate and the inner wall.