Application of foamed light soil in repairing of building foundation subsidence holes

A foam lightweight soil, foundation subsidence technology, applied in the direction of construction, infrastructure repair, infrastructure engineering, etc. The effect of firm rate and high fluidity

Active Publication Date: 2015-03-11
GUANGDONG SHENGRUI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the subsidence cavity caused by the subsidence of the building foundation, the existing technology is difficult to deal with, and there is no reliable treatment case
If conventional cement slurry is used for filling, on the one hand, the 58-65% solidification rate (due to solidification and subsidence) cannot guarantee that the cavity will be completely filled, and in addition, due to the high specific gravity of the filling body (conventional cement slurry), it cannot solve the problem of subsidence after treatment. At the same time, the filling cost is also high, so the building may be scrapped

Method used

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  • Application of foamed light soil in repairing of building foundation subsidence holes
  • Application of foamed light soil in repairing of building foundation subsidence holes

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A subsidence cavity in the foundation of a building, its structure is as follows figure 1 As shown, the building above the cavity is 30 meters high, and the subsidence cavity is about 2 meters deep when it is processed. The subsidence cavity of the foundation of the building is repaired by using foam light soil, including the following steps:

[0021] (1) According to the height of the building above the subsidence cavity, the density of the foam light soil to be used is determined to be 580 kg / m 3 , the strength is 0.8MPa;

[0022] (2) When starting the treatment, dig out the soft silt in the subsidence cavity, and then lay a waterproof geomembrane on the bottom layer of the subsidence cavity (purchased from Dezhou Dongfang Geotechnical Materials Co., Ltd., specification 0.5-1.0mm; the same below);

[0023] (3) Prepare foam light soil with the required density and strength at the construction site, and pour it into the subsidence cavity of the building foundation; wh...

Embodiment 2

[0027] A subsidence cavity in the foundation of a building, its structure is as follows figure 1 As shown, the building above the cavity is 60 meters high, and the subsidence cavity is about 3 meters deep when it is processed. The subsidence cavity of the foundation of the building is repaired by using foam light soil, including the following steps:

[0028] (1) According to the height of the building above the subsidence cavity, the density of the foam lightweight soil to be used is determined to be 650 kg / m 3 , the strength is 1.0MPa;

[0029] (2) When starting the treatment, dig out the soft silt in the subsidence cavity, and then lay a waterproof geomembrane on the bottom layer of the subsidence cavity;

[0030] (3) Prepare foam light soil with the required density and strength at the construction site, and pour it into the subsidence cavity of the building foundation; when pouring, pour it in layers, with a thickness of 80cm for each layer; pour the latter layer before ...

Embodiment 3

[0034] A subsidence cavity in the foundation of a building, its structure is as follows figure 1 As shown, the building above the cavity is 15 meters high, and the subsidence cavity is about 1.5 meters deep when it is processed. The subsidence cavity of the foundation of the building is repaired by using foam light soil, including the following steps:

[0035] (1) According to the height of the building above the subsidence cavity, the density of the foam lightweight soil to be used is determined to be 550 kg / m 3 , the strength is 0.6MPa;

[0036] (2) When starting the treatment, dig out the soft silt in the subsidence cavity to make the cavity reach a depth of 2 meters, and then lay a waterproof geomembrane on the bottom layer of the subsidence cavity;

[0037] (3) Prepare foam light soil with the required density and strength at the construction site, and pour it into the subsidence cavity of the building foundation; when pouring, pour it in layers, with a thickness of 50c...

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Abstract

The invention discloses an application of foamed light soil in repairing of building foundation subsidence holes. The application of the foamed light soil in repairing of building foundation subsidence holes includes the following steps: (1) density and strength of the foamed light soil to be used are determined according to height of a building above the subsidence holes; (2) waterproof geomembranes are paved on the bottom layers of the subsidence holes; (3) the foamed light soil with required density and strength is prepared at a construction site and poured in the building foundation subsidence holes, layered pouring is performed during pouring; and (4) the foamed light soil is used for filling the holes in a pouring mode, common surface soil is paved above the foamed light soil, and namely repairing operation is finished. The foamed light soil is used for repairing the building foundation subsidence holes, has the advantages of being high in fluidity and firmness rate, resistant to subsidence and the like, can fill the holes, and simultaneously is small in proportion. The problem of re-subsidence cannot occur after the holes are filled by the foamed light soil, and the foamed light soil is low in cost and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to the application of foam light soil in repairing subsidence cavities of building foundations. Background technique [0002] The subsidence of the building foundation is caused by the unqualified treatment of the soft foundation. It is because the measures such as piling, filling, and compaction cannot (fail) completely solve the problem of the subsidence of the soft foundation, which leads to the phenomenon of subsidence and voids in the subsidence of the foundation. [0003] For the subsidence cavity that occurs in the subsidence of the building foundation, the existing technology is difficult to deal with, and there is no reliable treatment case. If conventional cement slurry is used for filling, on the one hand, the 58-65% solidification rate (due to solidification and subsidence) cannot guarantee that the cavity will be completely filled, and in addition, du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D37/00
Inventor 陈忠平汪建斌陈俊霖马元锦
Owner GUANGDONG SHENGRUI TECH CO LTD
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