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Tunnel supporting structure

A technology for supporting structures and tunnels, used in tunnels, tunnel linings, wellbore linings, etc., can solve problems such as disturbance, overlying stratum settlement, and affecting the safe service life of the upper tunnels, achieving high stability and strong stability.

Active Publication Date: 2020-11-27
GUANGZHOU NO 2 MUNICIPAL ENG CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] Such as Figure 1-3 , a tunnel support structure, comprising a newly-built tunnel 2, an existing tunnel 1, the newly-built tunnel 2 vertically passes through the existing tunnel 1 above it, and before the new-built tunnel 2 passes under, that is, the construction of the newly-built tunnel 2 until the impact has been eliminated Before there was a tunnel 1, it included the following supporting structures: four vertical small wells 3, arranged on both sides of the new tunnel 2 and also on both sides of the existing tunnel 1 ( figure 1 Top view, respectively arranged in the four quadrants of the Cartesian coordinate system composed of the new tunnel 2 and the existing tunnel 1), the front and rear positions of the vertical wells 3 need to ensure that the construction does not affect the existing tunnel 1, and each vertical well 3 is far from the newly buil...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/14E21D11/18E21D11/10E21D11/15
CPCE21D9/001E21D11/14E21D11/18E21D11/10E21D11/155
Inventor 张刚
Owner GUANGZHOU NO 2 MUNICIPAL ENG CO LTD
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