Air bag hole sealing type cloth bag grouting method

Abstract

The invention provides an air bag hole sealing type cloth bag grouting method. The air bag hole sealing type cloth bag grouting method comprises the following steps that a cloth bag provided with a grout overflow hole is placed into a drill hole, an elastic air bag used for sealing the drill hole is fixed on a grouting pipe, the elastic air bag is connected with an air pump through an air pipe, the grouting pipe is put into a first section of grouting position in the cloth bag before grouting, the air pump is utilized to inflate the elastic air bag through an inflation pipe, the outer side wall of the elastic air bag abuts against the inner side wall of the drill hole, the elastic air bag is inflated to a certain pressure to block the drill hole, then grouting is conducted, and cement grout permeates into a foundation through the grout overflow holes in the cloth bag; and after the first section of grouting is completed, the elastic air bag is deflated, then the grouting pipe is lifted up, then the elastic air bag is inflated, second section of grouting is started, and the process is circulated until the whole drilled hole grouting is completed. The technical scheme provided by the invention has the beneficial effects that the advantages of a cloth bag pile and grouting reinforcement are fully combined, the reinforcement range can be controlled, a good grouting effect can be achieved, the formed pile foundation structure can be ensured to be a preset reinforcement body, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of soft foundation treatment, in particular to an airbag-sealing cloth bag grouting method. Background technique [0002] When carrying out engineering construction in soft soil areas, foundation treatment is usually required first. Grouting treatment is a very common soft foundation treatment method, including flower tube grouting, cloth bag grouting, etc. Flower tube grouting is to put the grouting pipe into the formation through the drill hole, and adopt the segmental grouting process to make the grout enter the formation evenly under pressure conditions, so as to achieve the purpose of segmental controllable and uniform diffusion of the grout in the formation . Set the grouting outer pipe during grouting, and the grouting outer pipe will permanently stay in the soil. The grouting outer pipe reserves a grouting outlet at a certain interval, and a stop valve is added at the grouting outlet. When grouting,...

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Problems solved by technology

[0003] In the existing technical solutions, the cost of flower tube grouting is high because the outer tube of grouting needs to stay in the soil; the pile body formed by cloth bag grouting is segmented, the integrity of the pile body is poor, and the uniaxial The vertical compressive strength is small, and the grout cannot be injected into the cracks of the soil layer, and the root network grout vein complex cannot be formed in the cracks of the soil around the pile body, and the reinforcement range is small

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