Compacting grouting method

Abstract

The invention provides a compacting grouting method. The compacting grouting method comprises the following steps of drilling grouting holes in a standard block of an annular pipe sheet, wherein the grouting holes comprise the first set of grouting holes, the second set of grouting holes and the third set of grouting holes which are symmetrically distributed from bottom to top in sequence; installing sleeve valve pipes in all the grouting holes, and installing one-way valves at the upper ends of the sleeve valve pipes; adopting rapid hardening cement mortar to seal the gaps formed by outer walls of the grouting holes and the outer walls of the sleeve valve pipes; conducting symmetric grouting on the first set of grouting holes, the second set of grouting holes and the third set of groutingholes from bottom to top in sequence; after grouting is finished, checking the grouting effect, and conducting hole patching grouting for unqualified sections; after grouting construction is finished, immediately cleaning the sleeve valve pipes, a grouting machine and an agitator. By means of the compacting grouting method, the grouting efficiency can be improved, and the stability of structuresof the two sides of a tunnel is guaranteed, so that a subway is steadily run.

Description

technical field [0001] The invention relates to the technical field of compaction grouting, in particular to a compaction grouting method. Background technique [0002] The Huangsha-Changshou Road section of Guangzhou Metro Line 1 is a shield tunnel section, and the foundation pit and pile foundation of the project construction are close to the station and the section tunnel. Since January 2011, it has been found that there are many longitudinal cracks in the segment at the top of the K5+400~K5+483 tunnel at 10 o'clock~12 o'clock (facing the Huangsha Station). Running through the entire segment, the maximum crack width is approximately 0.58mm; most of the segments have longitudinal cracks at K5+411~K5+480 at 12 o'clock to 3 o'clock (facing Huangsha station), and the cracks are roughly in line with The descending lines are distributed in a mirror image. Among them, the segment cracking at 12 o'clock to 1 o'clock at K5+440 is more serious, and the maximum crack width is abou...

AI Technical Summary

Problems solved by technology

[0004] The existing compaction grouting technology scheme adopts single-hole grouting operation, and the operation efficiency is low, and the distribution of grouting holes is unreasonable. After that, grouting is performed randomly or in a certain order in each grouting hole, and the grouting holes The amount of grouting and the time of grouting are inconsistent. In summary, it is easy to lead to inconsistent structures on both sides of the tunnel after reinforcement, which makes the subway track uneven and affects the operation of the train due to uneven force during the operation of the subway.

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