TBM (tunnel boring machine) tunnel application segment temporary support device and pea gravel backfill grouting method

Abstract

The invention relates to the technical field of tunnel construction, in particular to a TBM (tunnel boring machine) tunnel application segment temporary support device and a pea gravel backfill grouting method. The TBM tunnel application segment temporary support device comprises a fixing bed and a plurality of support strips. The front ends of the support strips are fixedly connected with the fixing bed, and the support strips are parallelly arranged on the same circumference at intervals; rollers are mounted at the bottoms of the support strips. The pea gravel backfill grouting method includes working procedures of mounting the TBM tunnel application segment temporary support device; applying segments; blow-filling pea gravel; pulling away the TBM tunnel application segment temporary support device; supplementing and backfilling pea gravel and the like. The TBM tunnel application segment temporary support device and the pea gravel backfill grouting method have the advantages that thepea gravel backfill grouting method includes simple construction processes, and the construction quality can be obviously improved by the pea gravel backfill grouting method; the locations of the segments can be stabilized by the TBM tunnel application segment temporary support device, accordingly, influence of segment floating or sinking on the thicknesses of pea gravel filled layers can be reduced, stress concentration phenomena due to uneven thicknesses of the pea gravel can be prevented, and the integral safety of TBM tunnel structures can be improved; the TBM tunnel application segment temporary support device and the pea gravel backfill grouting method are particularly applicable to places with high underground water levels under complicated geological environment conditions.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a temporary support device for constructing segments in a TBM tunnel and a method for backfilling and grouting pea gravel. Background technique [0002] With the increase of social and economic needs and the development and progress of science and technology, shield TBM is more and more used in tunnel engineering. After the lining installation is completed, there will be a certain gap between the outer arc surface and the surrounding rock. At this time, it is necessary to use pea gravel backfill grouting to connect the two, so as to achieve force transmission, seepage prevention and pressure bearing capacity. However, the existing The main problem of the bean gravel backfill grouting method is that the top bean gravel backfill is not full, and the segment floats or sinks, resulting in uneven thickness distribution of the bean gravel filling layer, which increases the ...

AI Technical Summary

Problems solved by technology

[0002] With the increase of social and economic needs and the development and progress of science and technology, the application of shield TBM in tunnel engineering is increasing. After the lining installation is completed, there will be a certain gap between the outer arc surface and the surrounding rock. At this time, it is necessary to use pea gravel backfill grouting to connect the two, so as to achieve force transmission, seepage prevention and pressure bearing capacity. However, the existing The main problem of the bean gravel backfill grouting method is that the top bean gravel backfill is not full, and the segment floats or sinks, resulting in uneven thickness distribution of the bean gravel filling layer, which increases the investment and risk of project construction and greatly reduces the project cost. quality, buried safety hazards

In addition, the uneven distribution of the pea gravel packing layer will also lead to differences in the values ​​of the formation resistance coefficient at different positions on the tunnel cross section

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