Double-liquid grouting device for leaking stoppage and emergency rescue of foundation pit engineering and construction method

Abstract

The invention discloses a double-liquid grouting device for leaking stoppage and emergency rescue of foundation pit engineering and a construction method. The double-liquid grouting device comprises an inner pipe, an outer pipe, a first slurry pump and a second slurry pump, wherein the outer pipe is sleeved with the inner pipe, the inner pipe is connected with the first slurry pump, the outer pipe is connected with the second slurry pump, the inner pipe and the outer pipe are both in an L shape, a first pouring opening is formed in the upper end of the inner pipe, the upper end of the outer pipe is provided with a second pouring opening, the lower end of the inner pipe is provided with a mixing section, the mixing section is located in the outer pipe, the inner pipe and the outer pipe are connected in a sleeved mode, the field operation space can be saved, the mixing section is arranged at the lower end of the inner pipe, the proportion of cement paste and water glass can be flexibly adjusted, therefore, the cement paste and the water glass are fully mixed to achieve the purpose of blocking water leakage.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering construction, in particular to a double-fluid grouting device and construction method for leak plugging and emergency rescue in foundation pit engineering. Background technique [0002] In construction and municipal engineering, if it is necessary to build a basement or excavate a trench, it is necessary to carry out foundation pit support and water-stop curtain or underground diaphragm wall construction. When the water-stop curtain is built due to complex geology, construction operations or construction machinery failures, etc., resulting in defects such as the failure of the mixing pile or the rotary spray pile to overlap, the water-stop curtain cannot achieve the function of stopping water and intercepting groundwater, or the underground There are defects in the lap joints of the continuous wall, which cause water leakage or large sand gushing water during the excavation of the...

AI Technical Summary

Problems solved by technology

When the water-stop curtain is built due to complex geology, construction operations or construction machinery failures, etc., resulting in defects such as the failure of the mixing pile or the rotary spray pile to overlap, the water-stop curtain cannot achieve the function of stopping water and intercepting groundwater, or the underground There are defects in the lap joints of the continuous wall, which cause water leakage or large sand gushing water during the excavation of the foundation pit. The leakage of water in the foundation pit makes it impossible to excavate the foundation pit and even affects the surrounding environment. The defect or failure of the project is a serious quality accident of the project. In this case, measures such as anti-seepage and plugging remedial or even emergency measures should be taken in project design or construction.

[0003] There are various types of double-liquid grouting pumps on the market, and the double-liquid grouting pumps are used to transport the double-liquid grout, and the double-liquid grouting construction site generally uses a drilling-filling machine (WSS method) , but the cement water glass double liquid mixing section of this method only has the position of the drill bit. The double liquid slurry mixing section is short, the mixing time is short, the grouting flow rate is small, and the grouting pressure is small. When removing the drill pipe, it is easy to block the pipe and remove the drill pipe. It is necessary to inject water first, the cement water glass takes a long time to solidify and the strength of the consolidated body is small, etc., which cannot effectively and quickly solve the problem of sealing water seepage in the foundation pit, especially the large sand gushing and water gushing.

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