JP4807624B2 - Non-uniform settlement correction method for buildings using water pressure. - Google Patents

Description

The present invention relates to a method for correcting a subsidence of a building using water pressure to correct a building with a basement that has subsided.

  Conventionally, to build a building, the ground of the land to be built is first investigated, the earth strength is calculated, and then the foundation and pile are designed. In other words, if the earth bearing capacity is always greater than the weight of the building, the building cannot be confirmed.

  However, with regard to the required ground strength for the building, the weight of the building plus a margin is required. For this reason, it is often a question of how much plus margin you can afford.

  Of course, there is no problem as long as the ground is solid, but if there is not enough ground strength for the weight of the building, ground improvement and construction of steel pipe piles will be required. Furthermore, in the ground such as newly developed land and poorly soiled land, there is a part where the ground strength is partially low, so that there is a problem that uneven settlement is likely to occur.

  As described above, even when the building is constructed with sufficient consideration for the earth resistance, there is a problem that the building is inclined due to secular change due to secular change.

  Conventionally, when a building is tilted in this way, a new foundation is constructed in the immediate vicinity of the unsettled building, a jack is installed on the foundation, and the building is jacked up. Underpinning methods such as driving the pile to the support ground and installing a jack on the upper part of the steel pipe pile to jack up the building are known, but both methods are expensive and require long-term repair work. There was a problem such as needing.

Therefore, the present invention provides a hollow structure in which water inlets are provided at a plurality of locations below the slab in the basement at the early stage of construction without relying on the conventional underpinning method as a repair method when the building is subsidized. The mat is laid, the water pipe is piped to the inlet, water is injected into the mat from the inlet in response to the uneven settlement of the building, and the pressure of the water is used to correct the uneven settlement of the building. The problem is to provide a method for correcting the subsidence of buildings using water pressure, which can shorten the cost and drastically reduce costs.

To achieve the foregoing object, the invention according to claim 1, in the modified method when building with basement differential settlement is tilted building occurred due to aging, Ri per To build an underground chamber, The ground surface is dug down to the required depth for building the basement, and crushed stone is put into the bottom of the dug, the crushed stone is crushed, and the concrete is thrown into the top and solidified. After laying the vinyl sheet so that the concrete and the slab are not united, the lower part of the slab in the basement is divided into four crosses, and a waterproof sheet configured in a concave shape is laid on the four divided four sides, and the inside of the waterproof sheet is placed inside Fill with sand, pipe the water pipe to the inside of the tarpaulin, and when constructing the basement floor slab, look at the bottom of the basement slab from the bottom, If the cross-shaped slab part at the bottom of the slab protrudes in a bowl shape from the bottom of the slab, and the upper end of the recessed portion of the waterproof sheet is embedded in the slab, and the building does not sink, Water is injected into the waterproof sheet from one of the water-resistant pipes on the four sides of the waterproof sheet, and the uneven settlement of the building is corrected by the water pressure .

According to the first aspect of the present invention, a waterproof sheet configured in a concave shape is laid at a plurality of locations below the slab of the basement, the inside of the waterproof sheet is filled with sand, the upper end of the recess is embedded in the slab, and the water pipe is Piping to the inside of the waterproof sheet and injecting water into the waterproof sheet in response to the uneven settlement of the building to correct the uneven settlement of the building. Underpinning method is not required, such as installing the jack after the upper part is hardened with concrete and then jacking up the building, leading to a shortened construction period and greatly reducing costs. .

Embodiment 1 of the present invention will be described below.
Embodiment 1 of the Invention

  1 to 3 show Embodiment 1 of the present invention.

  FIG. 1 a is a cross-sectional view of the building 1 and the basement 3. In order to construct the basement 3, the ground surface 2 is dug down to a predetermined depth necessary for constructing the basement 3, and the crushed stone 9 is put into the bottom of the dug, and the crushed stone 9 is crushed and discarded at the top. The concrete 8 is driven and hardened, and the mat 7 is placed after the vinyl sheet 4 is laid on the discarded concrete 8 so that the discarded concrete 8 and the slab 6 are not integrated with each other, and the slab 6 is constructed thereon.

  Then, when the building 1 is caused to sink by any amount, as shown in FIG. 2, the water supply pipe 5a, the water supply pipe 5b, and the water supply pipe 5c of the mat 7a, mat 7b, mat 7c, and mat 7d at the place where the sinking has occurred. Then, water is injected from the water pipe 5d, and the uneven settlement of the building is corrected by the pressure of the water.

  The mat 7 is configured to be hollow and hermetically sealed. By injecting water into the mat 7, the uneven settlement of the building is corrected by water pressure.

  Furthermore, as shown in FIG. 3b, by putting sand 10 in a mat 7 in a hollow and sealed state, the crushed stones contained in the discarded concrete 8 and the slab 6 do not directly collide with each other. The performance of the mat 7 is stabilized over a long period of time.

The second embodiment of the present invention will be described below.
[Embodiment 2 of the Invention]

  4 and 5 show a second embodiment of the present invention. In the first aspect of the present invention, the mat 7 is formed in a hollow and sealed state, whereas in the second embodiment of the present invention, the waterproof sheet 11 is formed in a concave shape as shown in FIG. 5b. When the inside is filled with sand 10 and the upper end 11e of the concave portion of the waterproof sheet 11 is embedded in the slab 6 and the building 1 is subjected to the uneven settlement, the waterproof sheet 11a in the place where the uneven settlement occurs as shown in FIG. Water is injected from one of the water supply pipe 12a, the water supply pipe 12b, the water supply pipe 12c, and the water supply pipe 12d of the sheet 11b, the waterproof sheet 11c, and the waterproof sheet 11d, and the uneven settlement of the building is corrected by the pressure of the water. Other construction methods are the same as in the first embodiment of the present invention.

The third embodiment of the present invention will be described below.
Embodiment 3 of the Invention

  6 and 7 show a third embodiment of the present invention. In the second aspect of the present invention, the waterproof sheet 11 is configured in a concave shape and the inner side is configured to be filled with the sand 10, whereas in the third embodiment of the present invention, the waterproof sheet 11 is formed around the basement. Since the land is a non-permeable ground, the waterproof sheet 11 becomes unnecessary. Other construction methods are the same as in the second embodiment of the present invention.

The fourth embodiment of the present invention will be described below.
[Embodiment 4 of the Invention]

  FIG. 8 shows a fourth embodiment of the present invention. In the first to seventh aspects of the present invention, the differential settlement correction method has been described corresponding to the slab of the basement, whereas in the fourth embodiment of the present invention, the differential settlement correction method has been applied to correspond to the pressure resistant foundation. explain.

  In order to construct the pressure-resistant foundation 18 of the building, the ground surface 14 is dug down to a predetermined depth necessary for constructing the pressure-resistant foundation 18, and the crushed stone 15 is put into the dug bottom, and the crushed stone 15 is rolled. The discarded concrete 16 is driven into the upper part and hardened. Further, a mat 20 filled with sand 19 is placed after the vinyl sheet 17 is laid so that the discarded concrete 16 and the pressure resistant foundation 18 concrete are not integrated, and the pressure resistant foundation 18 is placed on the upper part. Build up.

  By injecting water from the pipe joint 22 provided in the water pipe 21 into the mat 20 configured in this manner, the mat 19 swells and the uneven settlement of the building is corrected by the pressure of the water. It is to be noted that high water pressure is applied to the water supply pipe 21 to supply water to the mat 20, or the water supply port of the water supply pipe 21 is provided at a position higher than the ground surface and water is supplied to the mat 20 by water pressure with a difference in height. Is desirable. Other construction methods are the same as in the first embodiment of the present invention.

As mentioned above, based on the embodiments, the underground subsidence correction method using the pressure of water according to the present invention has been described in detail, but the present invention is not limited to the above embodiments, and the invention Even if various modifications are made without departing from the gist of the present invention, it goes without saying that they belong to the technical scope of the present invention.

  Further, the mat 7 shown in FIG. 1b is not limited to a mat, and may be a structure such as a rubber balloon made of an elastic material.

  Moreover, the sand 10 displayed on FIG. 3b, FIG. 5b, and FIG. 6 is not limited to sand, and can be a fine material such as a minimal crushed stone.

  Although sand 10 is used in FIG. 3b, it is also possible to use a material other than sand 10 that expands when water is absorbed, such as gel.

  In FIG. 1b, the vinyl sheet 4 is provided between the discarded concrete 8 and the slab 6. However, the material is not limited to the vinyl sheet 4, and any material that does not adhere to the discarded concrete 8 and the slab 6 can be used. It is also possible to use materials such as

  In FIGS. 1 to 7, the non-settlement correction method has been described corresponding to the slab in the basement, but this method can be similarly applied to the case of the pressure-resistant foundation in FIG.

It is sectional drawing of the building and basement which concern on Embodiment 1 of this invention. It is a top view of the mat | matte of the slab lower part of the basement which concerns on the same Embodiment 1. FIG. It is the top view and sectional drawing of the mat | matte which concern on the same Embodiment 1. It is a top view of the waterproof sheet of the slab lower part of the basement which concerns on Embodiment 2 of this invention. It is the top view and sectional drawing of the waterproof sheet which concern on the same Embodiment 2. FIG. It is sectional drawing of the basement which concerns on Embodiment 3 of this invention. It is sectional drawing of the basement which concerns on the same Embodiment 3. It is sectional drawing of the building which concerns on Embodiment 4 of this invention, and a pressure | voltage resistant foundation. It is the top view and sectional drawing of the mat | matte which concern on the same Embodiment 4.

Explanation of symbols

1 Building 2 Ground Surface 3 Basement 4 Vinyl Sheet 5 Water Pipe 6 Slab 7 Mat 8 Discarded Concrete 9 Crushed Stone 10 Sand 11 Waterproof Sheet 12 Water Pipe 13 Building 14 Ground Surface 15 Crushed Stone 16 Discarded Concrete 17 Vinyl Sheet 18 Pressure Base 19 Sand 20 Mat 21 Water pipe 22 Pipe joint

Claims (1)

In the correction method when a building with a basement has been subsidized due to secular change and the building is tilted, when constructing the basement, the ground surface is dug down to a predetermined depth necessary for constructing the basement and then dug down. Put the crushed stone in the bottom, roll the crushed stone, throw the discarded concrete into the top, harden it, and lay the vinyl sheet on the discarded concrete so that the discarded concrete and the slab do not become one, then in the basement When constructing the floor slab, in order to lay a concave waterproof sheet on the four sides of the basement slab, make the bottom of the slab protrude downward so that the bottom of the slab has a bowl shape. Divide the waterproof sheet into four parts, lay a concave waterproof sheet on the four sides, fill the inside of the waterproof sheet with sand, and waterproof the water pipe With piping to the inside, the recess upper tarpaulin embedded in the slab, if the building caused the differential settlement, water was injected into the waterproof sheet from differential settlement location water pipes that are plumbed to tarpaulin, water The method of correcting the uneven settlement of buildings using the pressure of water, characterized by correcting the uneven settlement of buildings with the pressure of .

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