An environmentally friendly and durable single-layer lining structure suitable for weak surrounding rock tunnels

Abstract

An environmentally friendly and durable single-layer lining structure suitable for tunnels with weak surrounding rocks. After excavation, concrete mixed with basalt fiber injection is arranged on the inner wall of the tunnel with weak surrounding rocks. A number of anchor rods laid in the rock formation, steel mesh and outer concrete mixed with basalt fibers sprayed on the steel mesh; the above-mentioned single-layer lining structure is: a drainage pipe is set at the outer corrugated depression of the corrugated plate, and the outer surface of the corrugated plate is laid There are non-woven fabrics, and the gaps in the corrugated depressions are filled with filter materials; the above-mentioned annular corrugated plates that match the concrete on the inner wall of the tunnel are connected by multiple corrugated plates, and the overlapping parts between adjacent corrugated plates are fixed by bolts connect. The invention has the advantages of reasonable stress, good deformation resistance, strong pressure bearing capacity, good waterproof effect, simple construction process, low construction cost, low later operation and maintenance cost, resource saving, remarkable economic and environmental benefits, and broad application prospects.

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

Images