Tunnel structure defect repairing system and construction method

Abstract

The invention belongs to the field of tunnel reinforcing engineering, and relates to a tunnel structure defect repairing system and a construction method. The system involves a UHPC pavement structurelayer, a UHPC lining structure layer, hollow grouting steel pipe piles, foot locking anchor rods, cartridge anchor rods and a fireproof coating layer. Compared with the prior art, the tunnel structure defect repairing system and the construction method adopts UHPC as a tunnel defect treatment material, and UHPC has the excellent characteristics of high strength, corrosion resistance, high impermeability, impact resistance and the like, so that compared with a traditional reinforced concrete lining, the novel lining can save the construction procedures, reduce the construction difficulty and improve the construction efficiency, and meanwhile, the lining thickness can be remarkably reduced, and the high lining bearing capacity can be provided through the relatively thin UHPC lining thickness; and the system and the method are particularly suitable for solving the beyond limit problem of an existing lining, and have good economical efficiency and feasibility.

Description

technical field [0001] The invention belongs to the field of highway tunnel engineering, and relates to a tunnel structure defect repair system and a construction method. Background technique [0002] At present, my country's highway tunnel engineering has entered a period of reconstruction, maintenance and reinforcement. According to data, about 30% of my country's highway tunnels are in a sub-healthy state of disease development. According to the statistics, the causes of some operating tunnel diseases are inaccurate survey data, unexplored surrounding rock water systems and weak rock formations at the base, which lead to preference in determining surrounding rock grades, design without inverts, and some construction quality problems, resulting in Not long after the tunnel was put into operation, the lining cracked and fell off, the pavement cracked and bulged or subsided, and the cable trench was tilted and deformed. It endangers driving safety, and in severe cases, it n...

AI Technical Summary

Problems solved by technology

According to the statistics, the causes of some operating tunnel diseases are inaccurate survey data, unexplored surrounding rock water systems and weak rock formations at the base, which lead to preference in determining surrounding rock grades, design without inverts, and some construction quality problems, resulting in Shortly after the operation of the tunnel, the lining cracked and fell off, the pavement cracked and bulged or subsided, and the cable trench was tilted and deformed.

Threatening driving safety, road closures are required in severe cases, high maintenance costs, and bad social impact

[0003] The general tunnel lining demolition treatment method is to re-try the reinforced concrete lining. The demolition section is large, and it is necessary to erect steel arches or grid arches and lay waterproof layers. The process is complicated, the workload and construction are difficult, and there are problems of ordinary concrete Disadvantages of poor durability and impermeability

Images