The Method of Reinforcement and Correction of Building Foundation by Combined Grouting

A building and foundation technology, applied in the repair of foundation structure, construction, foundation structure engineering, etc., can solve problems such as high viscosity of polyurethane reaction raw materials, secondary cracking of structure foundation, high cost of polyurethane grouting, etc., to achieve uniformity and comprehensiveness Reinforcement effect, lower project cost, simple and fast construction difficulty
CN104047307BActive Publication Date: 2017-01-11SHANGHAI SHEN YUAN GEOTECHN +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI SHEN YUAN GEOTECHN
Publication Date
2017-01-11

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Abstract

The invention discloses a method for reinforcing and deviation correcting of building foundation through combined grouting. According to the method, polyurethane grouting and cement grouting are combined organically, polyurethane grouting drill holes are formed in the area where the maximal sedimentation occurs of the building foundation, the polyurethane reaction raw material slurry is grouted into the drill holes, the chemical reaction expansion is generated, so that the area where the maximal sedimentation occurs of the building foundation can be reinforced and lifted, meanwhile, cement grouting drill holes are formed in the periphery of the polyurethane grouting drill holes in a certain density, the pre-existing pores, pre-existing gaps and gaps generated after the polyurethane grouting foundation is lifted in the reinforced foundation are filled and reinforced through the cement grouting method, and a cement-reinforced body is formed. The method has the advantages the reinforcing and lifting of the building foundation through the polyurethane grouting are quick and precise; the building foundation is evenly and comprehensively reinforced through the cement grouting; the construction process is simple, convenient and fast, and the cost is low.
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Description

technical field

[0001] The invention relates to a treatment method for building foundations, in particular to a method for reinforcing and correcting building foundations by adopting joint grouting. Background technique

[0002] For buildings and structures built on weak foundations, if effective foundation treatment measures are not considered or taken during the design or construction phase, large-area land subsidence will easily occur after completion. If the foundation soil is weak and uneven, excessive differential settlement will occur. Cracks are generated in the building structure, which endangers the safety of the structure.

[0003] At present, there are many ways to strengthen the built buildings, but the following are commonly used:

[0004] Grouting reinforcement is a foundation reinforcement technology for weak foundations, foundation cavity defects, foundation settlement, correction of buildings and building deflection. Some defects in the foundation cause t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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