JPH0452813B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an apparatus for preventing water leakage from the outer wall of an underground structure.

BACKGROUND ART In general, the outer walls of important underground structures such as nuclear power related facilities and general buildings in civil engineering construction are treated to prevent water leakage.

Conventionally, this type of water leakage prevention treatment involves applying an asphalt waterproofing layer to the outdoor surface of the underground outer wall, or using a sub-drain method in combination with this to maintain the underground water level below a certain level.

However, with this type of structure, the ground around the structure is generally created with backfill soil and compacted using heavy equipment to meet the seismic design conditions, resulting in an even longer period of consolidation. Due to subsidence, friction occurred between the waterproof layer of the underground outer wall and the backfill soil, causing problems such as the waterproof layer shifting, breaking, or turning over, which was a major cause of water leakage.

This invention was proposed to solve the above-mentioned conventional problems, and it prevents the waterproof layer from shifting or breaking due to direct friction between the backfill soil and the waterproof layer, and completely prevents water leakage from underground outer walls. The purpose is to prevent

Means for Solving the Problems This invention provides a waterproof layer on the outdoor side of the outer wall of an underground structure, and erects a PC board on the outside of the waterproof layer, and this PC board has a plurality of vertical holes connected to the water collection pipe in a row in the vertical direction. The above object is achieved by providing a vertical hole and a plurality of horizontal holes on the sides of the vertical hole.

Embodiment Hereinafter, the present invention will be explained with reference to an embodiment illustrating the present invention. The figure shows a part of the basement of a building, and a waterproof layer 2 made of an asphalt waterproof layer or the like is provided on the outside of the exterior wall 1 on the entire surface of the exterior wall 1. Further, on the outdoor side of this waterproof layer 2, a PC board 3 is installed over the entire surface of the waterproof layer 2. PC board 3 is outer wall 1
It is supported by a foundation 4 made of cast-in-place concrete at the lower end.

In the PC board 3, a plurality of vertical holes 5 are formed continuously in the vertical direction of the PC board 3 and at regular intervals in the width direction of the PC board 3. Each vertical hole 5 is the foundation 4
It is connected by a connecting pipe 7 to a water collecting pipe 6 buried below the water pipe.

Further, a plurality of horizontal holes 8, . . . are formed in the side portion of each vertical hole 5 at regular intervals in the vertical direction of the vertical hole 5. In addition, the vertical hole 5 and the horizontal hole 8,
... shall be formed when forming the PC board 3.

In such a configuration, groundwater in the ground is guided into the horizontal holes 8, ... the vertical holes 5, and the vertical holes 5.
The groundwater inside is further collected into a collection pipe 6 by a connecting pipe 7. Then, the groundwater in the water collection pipe 6 is quickly drained to the ground by a drainage pump (not shown).

As a result, there is no fear that the groundwater in the ground will infiltrate into the room through the PC board 3, and leakage of groundwater can be completely prevented.

In addition, if drainage of groundwater is not required at all, the vertical holes 5 and horizontal holes 8 are not provided in the PC board 3 at all, and the PC board 3 is simply installed as a curing material for the waterproof layer 2.

Effects of the Invention This invention has the following effects because it has the above configuration.

The waterproof layer formed on the outside of the exterior wall of an underground structure is protected by installing a PC board in front of it, so direct friction between the waterproof layer and the surrounding ground will prevent the waterproof layer from shifting, breaking, or peeling. In addition, the PC board is equipped with vertical and horizontal holes to actively collect and drain groundwater, completely preventing groundwater leakage.

Additionally, since PC boards are used as the curing material for the waterproof layer, construction can be done extremely easily and in a short period of time.

Furthermore, when backfilling the surrounding ground, conventionally, great care was required to avoid damaging the waterproof layer, but with this device, the PC board becomes a curing material for the waterproof layer during backfilling, so it can be used as a curing material for the waterproof layer during backfilling. There is no need to worry, and construction can be streamlined and speeded up.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention; Figure 1 is a partial sectional view of the underground part of a building;
2 is an enlarged view of section A in FIG. 1, and FIG. 3 is a sectional view taken along the line B--B in FIG. 2. 1...Outer wall, 2...Waterproof layer, 3...PC board, 4
...Foundation, 5...Vertical hole, 6...Water collection pipe, 7...
Connecting pipe, 8...horizontal hole, 9...backfill soil.

Claims (1)

[Claims] 1. A waterproof layer is provided on the outdoor side of the outer wall of the underground structure, and a precast concrete board (hereinafter referred to as PC board) is installed on the outside of the waterproof layer, and multiple vertical holes are installed in series in the vertical direction on this PC board leading to water collection pipes. A water leakage prevention device for an outer wall of an underground structure, characterized in that a plurality of small holes are provided on the side of the vertical hole.