JPH0786242B2 - Basement floating prevention device and waterproof bag for the device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basement levitation preventing device for preventing a basement from floating due to buoyancy due to a rise in groundwater level, and a waterproof bag used for implementing this device.

[0002]

2. Description of the Related Art When a basement is built, the groundwater level rises during the rainy season or rainwater flows into the backfilling areas around the basement, and the buoyancy causes the basement to rise.

As a countermeasure against this, conventionally, the concrete forming the basement is made thicker than necessary and pressed down by its weight, the load of the upper building is applied, or an anchor is provided in the basic concrete to connect with the basement. Things are being done.

[0004]

[Problems to be Solved by the Invention] In the measures by weight,
When the groundwater level is low, an excessive load is applied, and there is a risk of subsidence in the basement. Especially in places where fluctuations in groundwater level occur, the ground is often not strong,
This danger cannot be ignored. In addition, the measures to provide the anchors have the disadvantages that the construction becomes complicated and the anchorages impair the airtightness of the basement, which easily causes water leakage.

Therefore, the object of the present invention is to provide a floatation preventing means which does not impair the hermeticity and the workability without adding an excessive weight.

[0006] In constructing a basement, as a method having excellent sealing property and workability, a waterproof bag construction method, that is, a hole is drilled and a bag made of a waterproof sheet is put therein, and a concrete panel or the like is put therein. A construction method is known in which a basement is formed and the surrounding area is backfilled (see Japanese Patent Publication No. 53-8139). In this construction method, it is also an object of the present invention to obtain a waterproof bag for implementing the above-mentioned floating prevention means.

[0007]

The present invention extends along the outer periphery of a basement having a closed structure, is located at a groundwater level that can withstand the levitation force of groundwater, and can collect and flow water from the surroundings. This is a basement levitation prevention device that comprises a water collection channel, a sump basin that collects water from this water collection channel, and a drainage pump that operates to discharge water when a certain amount or more of water has accumulated in the sump basin.

The present invention also includes a bag body which is made of a water-blocking sheet and covers the outer peripheral surface and the bottom surface of the basement to form a hermetically sealed structure.
A water barrier bag for the basement anti-floating device, which is provided along the outer periphery of this bag, is located at a water level that can withstand the levitation force of groundwater during installation, and has a water collection channel that can collect and flow water from the surrounding area. Include. Furthermore, this water collection channel is made of a water-permeable sheet, and the upper and lower end portions of the surface portion are joined to the outer peripheral surface of the bag body, and withstand the compressive force from the outside such as the net body and the short string body, and pass water. It also includes a material which is made of a material to be formed, is formed from the surface portion and a core portion provided between the bag body, and is deformable together with the bag body.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings.

The floating prevention device 10 shown in FIG.
It is installed in 1. The basement 11 has a closed structure in which a bag body 13 made of a water-blocking sheet such as vinyl or rubber is provided on the outer peripheral surface and the bottom surface of a concrete box body 12 to have a closed structure. . An upper building 16 is provided on the room 14.

A water collecting channel 17 is provided around the outer circumference of the basement 11 so as to make a horizontal circuit. The height of the water collection channel 17 is set to a position slightly lower than the limit groundwater level at which the basement 11 can withstand the floating force of groundwater. This waterway 1
The structure of 7 can be any structure as long as it can collect and flow water from the surroundings, for example, using an underground underground drainage pipe for agriculture with many small holes provided on the peripheral surface of the pipe. However, in this example, the configuration shown in FIG. 3 described later is adopted.

A drop pipe 18 is provided at one location of this water collection channel 17.
The fall pipe 18 is connected to the bag 13, the basement 1
1 penetrates the concrete wall and extends to a reservoir 19 formed in the hollow moat 15 to collect water from the water collecting passage 17
Lead to 9. A drainage pump 20 is provided in the sump 19 and automatically operates when a certain amount of water or more is accumulated in the sump 19 to discharge the water to the outside through a drainage pipe 21.

Since the floating prevention device 10 has the above-mentioned structure, it operates as follows. When the groundwater level rises and reaches the height 22 of the catchment 17, water flows into the catchment 17,
It passes through the drop pipe 18 and collects in a sump 19. The accumulated water is discharged by the drainage pump 20 and is constantly kept below a certain amount. In this way, the groundwater level around the basement 11 is maintained below a predetermined limit, and an excessive levitation force is prevented from acting on the basement 11.

As is clear from this operation, if the height of the water collecting passage 17 is set too low below the limit water level, the drainage pump 20 will be overloaded, so the height should be close to the limit. desirable.

Another floating prevention device 30 shown in FIG. 2 is installed in a basement 31. The basement 31 has a closed structure in which a bag body 33 made of a water-blocking sheet is provided on the outer peripheral surface and the bottom surface of a concrete box body 32, and has a room 34 but no empty trench. An upper building 35 is provided on the upper part.

A water collecting channel 36 is provided on the outer periphery of the basement 31 in the same manner as in the above example. A reservoir 37 is installed adjacent to the basement 31. This sump basin 37 and water collection channel 3
6 is communicated with the through hole 38, so that the water from the water collecting passage 36 is guided to the sump 38. A drainage pump 39 is provided in the sump 38 and automatically operates when a certain amount of water or more is accumulated in the sump 38 to discharge the water to the outside through a drainage pipe 40.

Since the floating prevention device 30 has the above-mentioned structure, it operates in the same manner as the device 10.

In each of the above-mentioned devices, a water blocking bag having a bag with a water collecting channel is used. This structure will be specifically described with reference to the water-blocking bag 50 shown in FIG.

In this waterproof bag 50, the bag body 51 is made of a waterproof sheet such as vinyl or rubber and covers the outer circumference of the basement 52 to form a hermetically sealed structure. It is formed in the shape of a box. This bag 51
A water collecting channel 53 is provided along the outer periphery of the water tank, and is located at a water level that can withstand the levitation force of ground water during installation.

The water collecting passage 53 comprises a surface portion 54 and a core portion 55. The surface portion 54 is made of a water-permeable sheet such as cloth or a vinyl sheet having a large number of holes, and its upper and lower end portions are joined to the outer peripheral surface of the bag body 51 with an adhesive or the like. Further, in this example, they are reinforced and attached by the adhesive tapes 56, .... The core portion 55 is provided between the surface portion 54 and the bag body 51, withstands a compressive force from the outside such as a net body such as a saran net and a short string used as a packing filler, and allows water to pass therethrough. It is made of materials with properties.

Since this waterproof bag 50 has the above-mentioned structure,
The water collection channel 52 can be deformed together with the bag body 51. Therefore, this waterproof bag can be used without changing the conventional waterproof bag construction method. That is, after being formed into a predetermined shape at the factory, it is folded and transported to a construction site like a conventional bag body, at the site, a hole is excavated and put inside, and a basement is formed with a concrete panel or the like inside, It is used to fill the surrounding area. At this time, of course, it is not necessary to perform special work to install the water collection channel.

[0022]

As described above, when the groundwater level rises, the underground levitation prevention device of the present invention collects groundwater through a water collection channel and automatically discharges it with a drainage pump, resulting in an excessive levitation force due to groundwater. Since it does not become, it prevents the basement from floating. Moreover, since it does not increase the weight of the basement, it does not cause the subsidence of the basement, and since it does not use an anchor, the construction is easy, and there is no inconvenience such as water leakage from the anchor.

Further, since the water shielding bag for the basement floating prevention device of the present invention has a construction in which the water collecting passage is provided in the bag body, by using this, the work of installing the water collecting passage is facilitated and the workability is improved. To do.

Further, if a deformable water collecting channel is provided in this water blocking bag, the work of installing the water collecting channel becomes unnecessary, and the conventional water blocking bag can be carried out without any change. The efficiency requirements peculiar to the bag construction method will not be impaired.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of a basement floating prevention device of the present invention.

FIG. 2 is a cross-sectional view of another embodiment of the basement floating prevention device of the present invention.

FIG. 3 is a perspective view showing a part of an embodiment of a water blocking bag for a basement floating prevention device of the present invention in a partially cutaway manner.

[Explanation of symbols]

10, 30 ... Basement floating prevention device, 11, 31 ... Basement, 13, 33 ... Bag body, 17, 36 ... Water collection channel, 19, 3
7 ... Reservoir, 20, 39 ... Drainage pump, 50 ... Impermeable bag for basement floating prevention device, 51 ... Bag body, 53 ... Water collection channel, 54
… Surface part, 55… core part.

Claims (3)

[Claims] 1. A water collecting channel that extends along the outer periphery of a basement having a closed structure, is located at a ground water level that can withstand the levitation force of ground water, and can collect and flow water from the surroundings, and from this water collecting channel. A basement ascent prevention device consisting of a sump for collecting water and a drainage pump that operates when a certain amount of water has accumulated in the sump and drains the water. 2. A bag body which is made of a water-blocking sheet and covers the outer peripheral surface and the bottom surface of the basement and has a closed structure, and a water level which is provided along the outer periphery of the bag body and can withstand the levitation force of ground water during installation. The water barrier bag for the basement anti-floatation device, which is located at and has a water collection channel that can collect and flow water from the surrounding area. 3. The water collecting passage according to claim 2, wherein the water collecting passage is made of a water-permeable sheet, and upper and lower end portions of the surface portion are joined to the outer peripheral surface of the bag body, and the net body, the short cord body, and the like are compressed from the outside. For a basement floating prevention device, which is made of a material that withstands force and allows water to pass therethrough, is formed from the surface portion and a core portion provided between the bag body, and is deformable together with the bag body. Water barrier bag.