Segmented grouting device with instant grout mixing function and grouting method

Abstract

The invention discloses a segmented grouting device with an instant grout mixing function and a grouting method. The segmented grouting device with the instant grout mixing function comprises a steel sleeve, wherein one end of the steel sleeve is open, the other end of the steel sleeve is plugged, a plurality of grouting holes are formed in the circumferential outer wall of the steel sleeve, a grout spiral mixing pipe is axially inserted into the plugged end of the steel sleeve in a sliding mode, and a plurality of grouting steel pipes communicating with the grout spiral mixing pipe are axially inserted into the open end of the steel sleeve in a sealing mode; the grout inlet ends of the grouting steel pipes axially extend out of the steel sleeve and sequentially communicate with a pressure flow meter, a turning connector, a grouting hose and a grouting pump correspondingly. According to the segmented grouting device with the instant grout mixing function and the grouting method, the grouting pressure and the grout proportion can be controlled in real time, surrounding rock grouting reinforcement after tunnel excavation can be carried out, advanced curtain grouting reinforcement before tunnel excavation can be carried out, and the segmented grouting device with the instant grout mixing function have the advantages of being late in double-grout mixing, high in fluidity, long in duration time, capable of conducting segmented grouting, low in cost, easy to assemble and the like.

Description

technical field [0001] The invention relates to the technical field of grouting construction, in particular to a segmented grouting device and a grouting method with an instant grout mixing function. Background technique [0002] At present, when tunnels are excavated in weak strata, it is often encountered that the surrounding rock deformation is large and the support measures cannot be effective; and the current common practice is to strengthen the weak lithology area of ​​the tunnel through grouting, so that the stratum meets the needs of tunnel excavation and Support conditions. Due to the differences in lithology at different positions behind the excavation face, the types and parameters of the grout used are also different. At the present stage, for the reinforcement of weak surrounding rock, sleeve valve pipe grouting and film bag grouting are mainly used, and the type and parameters of the grout remain unchanged throughout the grouting process; They are all pre-sti...

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Problems solved by technology

[0005] After analysis, the two-fluid grouting pipe device in the above-mentioned patent is quite different from the present application in terms of the grout backflow prevention structure and the grouting method, so it does not affect the novelty of the present application

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