JP2008008127A - Construction method for correcting differential settlement of building by utilizing buoyancy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method for correcting differential settlement of a building, which corrects the building subjected to the differential settlement, when the building is subjected to the differential settlement. <P>SOLUTION: The construction method for correcting the differential settlement of the building by utilizing buoyancy comprises the steps of: laying hollow mats each provided with a water injection port in a plurality of places in the lower portion of a slab of a basement, respectively; arranging a water pipe up to the injection port and injecting water into the hollow mat in the place subjected to the differential settlement in accordance with the differential settlement of the building, so that the differential settlement of the building is corrected by utilizing the pressure of the water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for correcting a subsidence of a building that uses buoyancy 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 uneven settlement of the building is corrected using the buoyancy of the water. The problem is to provide a method for correcting the uneven settlement of buildings using buoyancy, which can significantly reduce the cost and cost.

  In order to achieve such an object, the invention according to claim 1 lays a hollow mat provided with water inlets at a plurality of locations below the slab of the basement, and pipes the water supply pipe to the inlet, The feature is that water is poured into the mat in response to the uneven settlement of the building to correct the uneven settlement of the building.

  According to the second 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 provided with the waterproof sheet. In addition to piping to the inside of the building, water is injected into the waterproof sheet in response to the uneven settlement of the building to correct the uneven settlement of the building.

  The invention according to claim 3 is a non-permeable layer in the ground, provided with sandboxes at a plurality of locations below the slab of the basement, piped water pipes to the inside of the sandbox, and adapted to non-settled buildings. It is characterized by injecting water into a sandbox surrounded by layers and correcting the uneven settlement of the building.

In addition to the construction method according to any one of claims 1 to 3, the invention according to claim 4

  The invention according to claim 5 lays a hollow mat provided with water inlets at a plurality of positions below the pressure-resistant foundation, and pipes the water supply pipes to the inlets to cope with the uneven settlement of the building. It is characterized by injecting water into the mat and correcting the uneven settlement of the building.

形状に構成した事を特徴とする

Characterized by the shape

  The invention described in claim 7 is characterized in that in addition to the construction method described in claim 1 or 5, the mat is filled with sand.

  According to the first aspect of the present invention, a hollow mat provided with water inlets is laid at a plurality of locations below the slab of the basement, and the water pipe is connected to the inlet to cope with the uneven settlement of the building. Then, water was poured into the mat, and the uneven settlement of the building was corrected. As in the past, the steel pipe pile was driven to the support layer in the immediate vicinity of the foundation where the uneven settlement occurred, the upper part was hardened with concrete, and the jack was installed. This eliminates the need for an underpinning method such as jacking up, shortens the construction period, and significantly reduces the cost.

  According to the invention described in claim 2, the 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. .

  According to the invention described in claim 3, in the ground of the non-permeable layer, sandboxes are provided at a plurality of locations below the slab of the basement, and the water pipes are piped to the inside of the sandbox, and corresponding to the uneven settlement of the building. Since water was injected into the sandbox surrounded by the non-permeable layer and the uneven settlement of the building was corrected, as before, a steel pipe pile was driven to the support layer in the immediate vicinity of the foundation where the uneven settlement occurred, and the upper part was solidified with concrete. An underpinning method such as installing a jack and jacking up a building is not necessary, leading to a shortened construction period and a significant cost reduction.

建物の四面に均等に力を加えることが可能となり、建物が不同沈下した際、不同沈下した場所を効率よく修正することが可能となる。

It becomes possible to apply force evenly to the four sides of the building, and when the building sinks unevenly, it becomes possible to efficiently correct the place where the sinking occurred.

  According to the fifth aspect of the present invention, a hollow mat provided with water inlets is laid at a plurality of lower cylinders of the pressure-resistant foundation, and a water pipe is piped to the inlet to prevent uneven settlement of the building. Correspondingly, water was injected into the mat, and the uneven settlement of the building was corrected, so as before, the steel pipe pile was driven to the support layer in the immediate vicinity of the foundation where the uneven settlement occurred, the jack was installed after the upper part was hardened with concrete, An underpinning method of jacking up the building is not necessary, leading to a shortened construction period and a significant cost reduction.

物の四面に均等に力を加えることが可能となり、建物が不同沈下した際、不同沈下した場所を効率よく修正することが可能となる。

It becomes possible to apply force evenly to the four sides of the object, and when the building sinks unevenly, it becomes possible to efficiently correct the place where the sinking occurred.

  According to the seventh aspect of the present invention, since the mat is filled with sand, the crushed stone contained in the discarded concrete and the slab does not directly collide, and the performance of the mat is stabilized for a long period of time.

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 of the waterproof sheet 11 is filled with the sand 10 and the upper end 11e of the recessed portion of the waterproof sheet 11 is embedded in the slab 6 and the building 1 is subjected to uneven settlement, the waterproof sheet 11a in the place where the uneven settlement has occurred 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 described above, based on the embodiment, the underground subsidence correction method using buoyancy according to the present invention has been described in detail, but the present invention is not limited to the above embodiment, and the gist of the invention Even if various modifications are made without departing from the scope of the invention, it is a matter of course 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. FIG. 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 17 Discarded Concrete 17 Vinyl Sheet 18 Pressure Base 19 Sand 20 Mat 21 Water pipe 22 Pipe joint

Claims (7)

  In addition to laying hollow mats with water inlets at multiple locations below the slab in the basement, water pipes are connected to the inlets, and water is injected into the mats in response to uneven settlement of the building. A method for correcting the uneven settlement of buildings using buoyancy, characterized by correcting the uneven settlement.   A waterproof sheet constructed in a concave shape is laid at multiple locations below the slab in 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 piped to the inside of the waterproof sheet. A non-settlement correction method for buildings using buoyancy, which is characterized by injecting water into the waterproof sheet in response to the non-settlement and correcting the non-settlement of the building.   In the ground of a non-permeable layer, sandboxes are installed at multiple locations below the slab of the basement, and water pipes are piped to the inside of the sandbox, and water is supplied to the sandbox surrounded by the non-permeable layer corresponding to the uneven settlement of the building. A method for correcting the uneven settlement of buildings using buoyancy, which is characterized by injecting and correcting the uneven settlement of buildings.

A method for correcting the uneven settlement of buildings using the buoyancy described in one of them.   Place a hollow mat with water inlets at multiple locations below the pressure-resistant foundation, and connect a water pipe to the inlet to inject water into the mat in response to uneven settlement of the building. A method for correcting the uneven settlement of buildings using buoyancy, characterized by correcting the uneven settlement.

The method of correcting the uneven settlement of the building used.   6. The non-settled subsidence correction method for a building using buoyancy according to claim 1 or 5, wherein the mat is filled with sand.

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