A large-scale supplementary grouting method between segment and surrounding rock in tbm tunnel construction
A large-scale, tunnel-based technology, which is applied in tunnels, earthwork drilling, tunnel lining, etc., can solve the problems of no comparison documents found, and the inability to backfill and grout the entire section of the supporting trolley, so as to save manpower, avoid frequent relocation, and construction period short effect
Active Publication Date: 2022-05-03
CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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Problems solved by technology
[0004] 2. For TBM construction with small sections (the net diameter in the tunnel behind the lining segment is less than 5m), due to the limited supporting space, the slag discharge belt, secondary air duct and dust removal duct have occupied the space of the tunnel arch, resulting in The grouting hole in the 90° range on the top is covered, and it is impossible to backfill and grout the entire section on the supporting trolley, resulting in de-grouting
[0009] Through public literature search, no relevant comparative documents were found
Method used
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[0042] In order to further understand the content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are given below with reference to the accompanying drawings. It should be noted that this embodiment is descriptive, not restrictive, and cannot thereby limit the protection scope of the present invention.
[0043] A large-scale supplementary grouting method between a segment and surrounding rock in TBM tunnel construction, comprising the following steps:
[0044] Step 1, laying out the grout opening of the pipeline, using the TBM construction water supply steel pipes arranged along the tunnel wall in the tunnel, opening holes in the steel pipe wall at intervals of 50m in the grouting tunnel section, and then laying tee joints at the openings;
[0045] Step 2: Segmentation of the working face, the pipeline in step 1 is sequentially divided into: regulating pressure ramp section 11, controlling pressure section 12 a...
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A large-scale supplementary grouting method between segments and surrounding rocks in TBM tunnel construction, which fills the gap in solving the problem of large-scale backfill grouting in long tunnel sections that is common in the construction of small-section, long-distance TBM reverse slope excavation tunnels. Using the height difference and reverse slope conditions of the main and branch tunnels of the tunnel, provide a grouting construction method that uses the existing water supply pipes for tunnel construction to carry out grout transportation and centralized pressure. Avoid frequent relocation, installation, movement and operation and maintenance of mechanical equipment, save a lot of manpower and material resources, short construction period, high efficiency and convenient quality control grouting method, overcome the shortcomings and defects in the existing technology.
Description
technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a large-scale supplementary grouting method between segments and surrounding rocks in TBM tunnel construction. Background technique [0002] 1. In the lining construction of TBM excavation segment, the gap between the segment and the surrounding rock is filled with pea gravel and backfilled with grouting, so that the cemented pea gravel, segment and surrounding rock jointly bear the internal and external loads. At the same time, the pea gravel layer is cemented to form a closed anti-seepage circle, which improves the anti-seepage performance of the tunnel. Full-section backfill grouting needs to be completed on the post-supporting trolley (if possible, the post-supporting design is an upper and lower two-layer structure, and the segment grouting hole should be exposed as much as possible). [0003] Therefore, in the design of the post-supporting functions of the TBM,...
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IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 王灿林王富仓李勇李凌霄王宝友廖建炜
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD