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Tunnel Reinforcing Method of Spraying Steel Fiber Concrete Tunnel with Tunnel Mesh

A steel fiber and tunnel technology, applied in the direction of tunnel, tunnel lining, earthwork drilling, etc., can solve the problems of poor compression resistance, bending resistance and shear resistance, weak bearing capacity of lining structure, poor safety, etc., and achieves field operation. It has strong properties, prevents and inhibits the formation and development of cracks, and improves the bearing capacity.

Active Publication Date: 2021-10-08
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method suitable for reinforcement of tunnel mesh sprayed steel fiber reinforced concrete tunnels with slightly less lining thickness and moderate crack damage, so as to solve the problem of poor compression, bending and shear resistance after reinforcement. Weak structural bearing capacity and poor safety technical problems

Method used

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  • Tunnel Reinforcing Method of Spraying Steel Fiber Concrete Tunnel with Tunnel Mesh
  • Tunnel Reinforcing Method of Spraying Steel Fiber Concrete Tunnel with Tunnel Mesh
  • Tunnel Reinforcing Method of Spraying Steel Fiber Concrete Tunnel with Tunnel Mesh

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Embodiment 1

[0038] Embodiment 1: A kind of method for reinforcing the tunnel net sprayed steel fiber reinforced concrete tunnel, see Figure 1-4 , including the following steps:

[0039](1) Cross-section monitoring and re-testing: During the tunnel maintenance process, the surrounding rock and supporting structure 1 should be monitored for disease, cracks, peripheral displacement and vault subsidence, and corresponding indicators should be marked on site, and the surrounding area should be judged based on the monitoring data. The stability and working status of the rock and supporting structure 1 system, determine the selection and correction of supporting parameters and guide the construction. Before, the reinforcement section of the second lining is arranged in a section of 10-50m, and re-measurement is carried out on the inner contour construction of the section of the lining structure 2 to be reinforced at a distance of 5m, and the left and right arch waist positions of the tunnel are...

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Abstract

The invention discloses a reinforcement method suitable for tunnel mesh-sprayed steel fiber concrete tunnels with slightly less lining thickness and medium crack damage, aiming to solve the problem of poor compressive resistance, bending resistance and shear resistance after reinforcement, and weak bearing capacity of the lining structure , Poor safety technical problem, the present invention has undergone cross-section monitoring and re-testing→lining chiseling→painting interface agent→anchor anchoring→hanging steel mesh→spraying operation→spray layer leveling→maintenance; at the same time, it also discloses a tunnel complex The three-dimensional coordinates of any point near the tunnel section are actually measured by the total station; the design pile number and centerline offset distance of this point are calculated back, and the design elevation is calculated; the actual measurement data is calculated and drawn; the re-measurement section Compared with the original design section; the present invention has the advantages of low construction cost, strong field operability, and simple process. To a certain extent, it plays a role in strengthening the overall structure.

Description

technical field [0001] The invention relates to the technical field of underground tunnel engineering, in particular to a method for reinforcing a tunnel mesh-sprayed steel fiber concrete tunnel. Background technique [0002] With the rapid and stable development of my country's national economy, the demand and grade requirements for transportation are getting higher and higher, the construction of high-grade highways and railways is booming, and the number of tunnels built is increasing. Due to the corrosive effects of alternating wet and dry, sunlight exposure, coastal salt spray and humid air, the concrete surface of the tunnel gradually forms a porous corrosion surface, and the corrosive medium further penetrates into the concrete through the tiny gaps on the concrete surface, causing corrosion of the steel bars inside the reinforced concrete structure. , which in turn leads to cracking, water leakage, and large deformation of the tunnel lining; if effective reinforcemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10C04B28/02
CPCC04B28/02C04B2111/00155C04B2111/00724E21D11/105E21D11/107C04B14/02C04B14/48C04B2103/12C04B2103/302
Inventor 李学刚张传军陈礼博闫世巍杨毅李红胜秦小鹏齐保伟魏文慧
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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