JPH0663243B2 - Earthquake-resistant waterproof structure of underground structure - Google Patents

Description

The present invention relates to an earthquake-resistant waterproof structure for an underground structure, in which a lower portion of the underground structure is waterproofed.

[Problems to be solved by the invention]

Conventionally, waterproofing of underground structures is done by installing a water stop plate at the concrete joint, making the structure a double wall, double floor structure,
It is done by methods such as forming a waterproof layer on the outer peripheral surface of the structure and installing drainage equipment around the structure to discharge groundwater, but each has weaknesses in terms of durability and earthquake resistance. There is.

The method of installing the water stop plate has a limit to the waterproofness of the concrete itself, and the method of using the double structure is costly and requires a large space around the structure. With the method of forming the waterproof layer, the waterproof layer is likely to be damaged when a horizontal force is applied such as an earthquake, and durability may be deteriorated.With the method of installing the drainage facility, complete discharge is difficult, and maintenance is difficult. , Each has its own difficulties, and both are lacking in earthquake resistance.

The present invention has been made in view of the above background, focusing on the lack of earthquake resistance of the waterproof structure, and proposes a waterproof structure having high earthquake resistance and high durability.

[Means for solving problems]

In the present invention, a metal foil having high durability and zero water permeability is used as a core material, and the metal foil is sandwiched by an organic waterproof material to form a waterproof layer, which has earthquake resistance and is highly durable and waterproof. Form a structure.

The metal foil waterproof layer formed by sandwiching the metal foil with the organic waterproof material maintains the waterproof property by the metal foil even when the waterproof material is broken during horizontal displacement due to horizontal force.

In addition to this metal foil waterproof layer, another ordinary waterproof layer is installed as a sacrificial layer to be destroyed during horizontal displacement in order to prevent the damage, thereby enhancing the earthquake resistance, that is, the safety level in the event of an earthquake. Alternatively, the horizontal displacement of the metal foil waterproof layer is formed in a concavo-convex shape to restrain the horizontal displacement of the metal foil waterproof layer itself, thereby enhancing the earthquake resistance.

In the case of the former, the waterproof structure is a normal waterproof layer laid on the dumped concrete on the bedrock, and a waterproof layer supporting concrete composed of a floor and a wall, which is placed on the waterproof layer to surround the underground structure, A concrete foundation slab that is built inside and supports an underground structure is constructed, and a metal foil waterproof layer is laid over the entire surface between the waterproof layer supporting concrete and the concrete foundation.

In the latter case, it consists of a waterproof layer supporting concrete on rock, a concrete foundation plate and a metal foil waterproof layer, and the part of the metal foil waterproof layer that is laid along the floor of the waterproof layer supporting concrete is uneven in vertical section. Is formed.

〔Example〕

 The present invention will be described below with reference to the drawings showing an embodiment.

First, the first invention will be described with reference to FIGS.

As shown in FIG. 1, the present invention includes a waterproof layer 2 laid on a waste concrete 1, a waterproof layer supporting concrete 3 laid on this, and a metal foil waterproof layer 4 laid inside thereof.
And a concrete foundation plate 5.

The waste concrete 1 is placed horizontally on the bedrock A, and a waterproof layer 2 such as ordinary asphalt waterproof and sheet waterproof is laid on this. This waterproof layer 2 has a role as a sacrificial layer which is scheduled to be destroyed at the time of horizontal displacement, prevents the waterproof layer supporting concrete 3 from flowing out to the outside at the time of the destruction, and between the waterproof layer supporting concrete 3 and the discarded concrete 1. In order to stop the water, a water stop plate 2-1 in which a metal plate is sandwiched by non-vulcanized butyl etc. is installed at the end of the waterproof layer 2.

On the waterproof layer 2, a waterproof layer supporting concrete 3 that supports the metal foil waterproof layer 4 and adjusts the unevenness of the waste concrete 1 is placed. The waterproof layer supporting concrete 3 comprises a floor 3a and a wall 3b, and the wall 3b is cast up to the groundwater level.

The metal foil waterproof layer 4 is formed by sandwiching the metal foil 4a as a core material with the organic waterproof material 4b, and is laid over the entire inner circumference of the waterproof layer supporting concrete 3. The metal foil 4a is made of a material such as titanium, copper, or stainless that does not easily rust in terms of corrosion resistance and durability. Since the metal is the core material, the water permeability of the metal foil waterproof layer 4 becomes zero. The metal foil waterproof layer 4 is formed in the field and is also manufactured in a roll shape with a constant width as shown in FIG.

Inside the metal foil waterproof layer 4, a concrete foundation plate 5 that supports the underground structure B while pressing and protecting it is formed.

The metal foil waterproof layer 4 is prevented from flowing out between the concrete foundation plate 5 and the waterproof layer supporting concrete 3 by the epoxy resin 6 filled at the upper end between the two. The floor 3a of the waterproof layer supporting concrete 3 in which the metal foil waterproof layer 4 forms a horizontal surface
Waterproof layer 2 on the joint surface of floor 3a and wall 3b on the extension line of the part
The water stop plate 2-1 is installed in the same manner as.

FIG. 2 shows an embodiment in which the water blocking plates 2-1 are put in the metal foil waterproof layer 4 at predetermined intervals, and FIG. 3 shows the water blocking plate 2- in that case.
1 shows the arrangement status of No. 1.

Next, the second invention will be described with reference to FIGS.

As shown in FIG. 5, the present invention comprises a waterproof layer supporting concrete 3 cast on a bedrock A, a metal foil waterproof layer 4 laid on the waterproof layer supporting concrete 3, and a concrete foundation plate 5. 4 is a structure for restraining the horizontal displacement of itself by forming the portion of the waterproof layer supporting concrete 3 laid along the floor 3a surface in an uneven shape in the vertical cross section. In this invention, since the metal foil waterproof layer 4 itself has resistance to horizontal force, the waterproof layer 2 scheduled to be destroyed and the waste concrete 1 supporting it in the first invention are not necessary.

The unevenness on the floor 3a surface portion of the metal foil waterproof layer 4 partially forms a concave portion from the top end surface of the floor 3a portion of the waterproof layer supporting concrete 3, and in this concave portion, as shown in FIG. It is formed by dropping a hollow box-shaped portion from 4a and a component made of a plate-shaped metal foil 4a integrated around the upper end thereof. The upper end of the box-shaped portion is open, and the plate-shaped metal foil 4a is integrated with the outer periphery thereof, but the lower end is closed by the metal foil 4a, and the component shown in FIG. 6-I has a hat-shaped vertical cross section. is doing.

Construction is performed by laying the waterproof material 4b continuously from the surface side of the floor 3a to the convex portion relative to the concave portion, and then dropping the metal foil 4a parts shown in FIG. 6-I into the concave portion, and as shown in FIG. -As shown in II, the metal foils 4a, 4a on the upper surface of the adjacent parts are welded to each other, and the waterproof material 4b is further continuous from the surface side to the concave portion and the convex portion.
Is laid down.

Also in this case, as shown in FIG. 5, by the epoxy resin 6 filled in the upper end of the rising portion of the metal foil waterproof layer 4,
Water is stopped by arranging the water stop plate 2-1 as shown in FIGS. 2 and 3.

〔The invention's effect〕

As described above, according to the present invention, in addition to forming a waterproof layer having a metal foil as a core material, an ordinary waterproof layer serving as a sacrificial layer is provided, or unevenness is formed in a portion along the horizontal surface of the metal foil waterproof layer. As a result, it is possible to improve the earthquake resistance and durability of the waterproof structure, since it imparts earthquake resistance.

In addition, since the metal foil has zero water permeability, it can be completely waterproofed. Since the core material is protected from both sides by the organic waterproof material, it has high durability and corrosion resistance. It is good.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the first invention, FIG. 2 is an enlarged sectional view showing another embodiment, and FIG. 3 is a perspective view thereof.
FIGS. 4-I and II are a perspective view and a sectional view, respectively, showing an example of manufacturing the metal foil waterproof layer. FIG. 5 is a sectional view showing an embodiment of the second invention, FIG. 6-
I is a perspective view showing a component made of metal foil used in the present invention, and II is a perspective view showing its installation state. A: bedrock, B: underground structure, 1 ... discarded concrete, 2 ... waterproof layer, 2-1 ... water stop plate, 3 ... waterproof layer supporting concrete, 3a ... floor, 3b ... wall 4 ... Metal foil waterproof layer, 4a ... Metal foil, 4b ... Organic waterproof material, 5 ... Concrete base plate, 6 ... Epoxy resin.

Claims (2)

[Claims] 1. A waterproof layer laid on abandoned concrete on rock, a waterproof layer supporting concrete composed of a floor and a wall, which is placed on the waterproof layer to surround an underground structure, and a waterproof layer support. It is a waterproof structure that is constructed inside concrete and is composed of a concrete foundation plate that supports underground structures, and is between the waterproof layer supporting concrete and the concrete foundation plate, with a metal foil as a core material, A seismic waterproof structure for underground structures, in which a metal foil waterproof layer formed by sandwiching this with an organic waterproof material is laid. 2. A waterproof layer supporting concrete composed of a floor and a wall, which is cast on a rock so as to surround the underground structure, and a concrete foundation which is formed inside the waterproof layer supporting concrete and supports the underground structure. It is a waterproof structure composed of a slab, and a metal foil waterproof is formed by using a metal foil as a core material and sandwiching it with an organic waterproof material over the entire surface between the waterproof layer supporting concrete and the concrete foundation slab. Earthquake-resistant waterproof structure for underground structures, in which layers are laid, and the portion of the metal foil waterproof layer that is laid along the floor of the waterproof layer supporting concrete is formed in an uneven shape in vertical section. .