Tunnel supporting structure

Abstract

Disclosed is a tunnel supporting structure. A new tunnel is constructed under the condition of vertically penetrating an existing tunnel downwards, two tunnels are isolated by constructing circular-arch-shaped steel-concrete structure above a new tunnel to prevent the two tunnels from affecting each other (the upper portion is disturbed by lower portion tunnel construction, and lower portion tunnel construction / running disturbs a moving load of upper portion tunnel vehicle traffic). Through vertical small wells, front and rear small roadways, and left and right small roadways as space for constructing various grouting steel pipes, on the one hand, the construction has no disturbance to existing tunnels, the construction of the circular-arch-shaped steel-concrete structure do not interferewith tunnel excavation (can be conducted synchronously), and the tunnel excavation construction period is not affected; and on the other hand, the vertical small well, the front and rear small roadways, and the left and right small roadways can be filled with concrete through pouring to form a supporting structure similar to a circular arch-shaped steel-concrete structure, and all grouting steelpipes are connected into an integrated structure, so that the overall tunnel is not affected by loosening of individual grouting steel pipes.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a support structure for a tunnel passing through an existing tunnel. Background technique [0002] A tunnel is an engineering building buried in the ground, and it is a form of human use of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels, etc. With the rapid development of my country's economy, in order to adapt to the development of modern cities, more and more tunnels will appear. Deep, so there will be the situation that the tunnel passes through the existing tunnel, but the settlement of the overlying strata and even greater disturbance will inevitably be caused during the excavation of the tunnel, which will affect the safety and service life of the above tunnel, so there is an urgent need for a guarantee The upper tunnel is not disturbed by the excavation of the lower tunnel, and the tunnel that can be use...

AI Technical Summary

Problems solved by technology

With the rapid development of my country's economy, in order to adapt to the development of modern cities, more and more tunnels will appear. Therefore, there will be situations where the tunnel passes through the existing tunnel. However, the settlement of the overlying stratum and even greater disturbance will inevitably be caused during the excavation of the tunnel, which will affect the safety and service life of the tunnel above. Therefore, there is an urgent need for a guarantee The upper tunnel is not disturbed by the excavation of the lower tunnel and can be used safely for a long time. The supporting structure of the existing tunnel under the tunnel

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