Environment-friendly durable monolayer lining structure applicable to soft surrounding rock tunnel

Abstract

The invention relates to an environment-friendly durable monolayer lining structure applicable to a soft surrounding rock tunnel. The inner wall surface of the excavated soft surrounding rock tunnel is sequentially provided with sprayed concrete mixed with basalt fibers, a monolayer lining consisting of corrugated plates, a plurality of anchor rods arranged on a rock stratum from outside to inside, a reinforcing mesh and outer-layer concrete which is sprayed onto the reinforcing mesh and mixed with the basalt fibers. The monolayer lining structure is characterized in that drain pipes are arranged on the corrugated concave parts of the outer side of each corrugated plate, a non-woven fabric is laid on the outer surface of each corrugated plate, and a filtering material is used for filling gaps in the corrugated concave parts. The annular corrugated plates which are matched with the concrete on the inner wall of the tunnel are formed by connecting a plurality of corrugated plate bodies,and the overlapped part between every two adjacent corrugated plates are fixedly connected by bolts. The structure has the advantages that the stress condition is reasonable, the deformation resistance capacity and the pressure bearing capacity are excellent, the waterproof effect is great, a construction process is simple, the costs for construction, later-stage operation and maintenance are low,the resources are saved, economic benefits and environmental protection benefits are remarkable, and the application prospect is broad.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering support, in particular to an environmentally friendly and durable single-layer lining structure suitable for weak surrounding rock tunnels. Background technique [0002] In recent years, with the rapid development of my country's infrastructure construction, the number of tunnel projects built in the construction of roads, railways, water conservancy and other projects has also increased. The complexity and risk in the tunnel engineering construction process put forward higher requirements for the safety and practicability of the tunnel engineering lining structure. [0003] Tunnel lining refers to a permanent support structure built with reinforced concrete and other materials around the tunnel to prevent the deformation or collapse of the surrounding rock after the tunnel is excavated. At present, composite lining is mostly used in engineering, that is, tunnel lining with inner and o...

AI Technical Summary

Problems solved by technology

The use of composite lining is very beneficial to the stress of the lining. The surrounding rock can produce a certain controllable deformation under the condition of the outer flexible support. After the deformation is basically stable, the inner lining is applied to generate radial force on the original outer support. It is in a three-dimensional stress state, which is conducive to the stability of the tunnel lining structure; but with this kind of lining, there are many construction procedures, the construction process is complicated, the construction consumables are large, and the project cost is high

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