A Strengthening Method for Non-structural Longitudinal Cracks in Lining
A longitudinal crack and non-structural technology, which is applied in the direction of earthwork drilling, equipment, mining equipment, etc., can solve the problems of complex process and difficult control of grouting volume, and achieve enhanced structural stability, enhanced force, prevention and reinforcement of cracks Effect
Active Publication Date: 2019-11-12
中国建筑土木建设有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a reinforcement method for non-structural longitudinal cracks in the lining, to solve the technical problems that the grouting and superficial sealing of non-structural cracks are complicated and difficult to control the amount of grouting
Method used
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Embodiment Construction
[0042] Examples see Figure 1-5 As shown, a reinforcement method for lining non-structural longitudinal cracks, the construction steps are as follows:
[0043] Step 1, determine the location parameters of the secondary lining crack segment:
[0044] Check the cracked section within the lining range, confirm the range, width and depth of the cracked section, draw a plane display of the cracked section, and establish a ledger.
[0045] Step 2, check the support construction quality:
[0046] The initial support quality of the cracked section within the lining range is inspected, the inspection content includes the construction quality of the initial support steel frame, and the detection method adopts geological radar detection;
[0047] The secondary lining quality of the crack section within the lining range is inspected. The inspection content includes the degree of uncompactness of the secondary lining arch and the back of the side wall, whether there is a void, and whethe...
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The invention provides a reinforcement method for non-structural longitudinal cracks of a lining. The method comprises steps as follows: determination of location parameters of a crack section of a secondary lining, detection of supporting construction quality, data analysis, measurement and pore-forming, washing of bolting holes, sealing, grouting, quality inspection and monitoring measurement. According to the method, the crack expanding is effectively slowed down or prevented, and structural stability is enhanced. Crack distribution is wholly detected, the non-structural longitudinal cracksare screened out and reinforced, surrounding rocks and anchor rods are adopted for double reinforcement, surrounding rock reinforcement adopts self-propelled hollow grouting anchor rods, integrates drilling, hole cleaning and grouting and guarantees minimum disturbance to the cracks, concrete at orifices of the crack bolting holes is removed, then screeding is performed on cement mortar, and anchor rod base plates are stressed uniformly; meanwhile, the anchor rods at the cracks are in straddled alternate distribution to isolate the development direction of the cracks, the cracks are effectively prevented and reinforced, structural stress is enhanced, and concrete of a lining structure is effectively prevented from falling off.
Description
technical field [0001] The invention is applicable to the reinforcement of longitudinal cracks in lining structures of tunnels and underground engineering, especially the reinforcement of non-structural longitudinal long cracks. Background technique [0002] The secondary lining of tunnel concrete is an important link in tunnel construction. Even in the absence of external force, the construction of the secondary lining lags behind the initial support. Under improper conditions, non-structural cracks will occur on the concrete surface of the secondary lining. If the cracks crack, expand, and deteriorate in a three-dimensional state, it may cause peeling and falling of the secondary lining, which not only affects the structural stability of the tunnel, but also The operation safety of the tunnel will be affected due to crack water seepage. The commonly used crack treatment is grouting and superficial sealing at the cracks, but the commonly used grouting or superficial sealin...
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IPC IPC(8): E21D20/02G01D21/02
CPCE21D20/003E21D20/021G01D21/02
Inventor 翟朝晖龙廷于忠永
Owner 中国建筑土木建设有限公司