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Tunnel supporting structure

A technology for supporting structures and tunnels, applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems of overlying stratum settlement, disturbance, affecting the safe service life of the upper tunnels, etc., and achieves the effect of avoiding complex terrain and high stability

Active Publication Date: 2020-11-27
CHINA RAILWAY 21ST BUREAU GRP TRACK TRAFFIC ENG
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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

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0037] 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 built ...

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Abstract

The invention discloses a tunnel supporting structure. A new tunnel is constructed under the condition of vertically penetrating through an existing tunnel, a door-shaped steel-concrete structure is constructed above the new tunnel to isolate the new tunnel from the existing tunnel, so that the mutual influence (disturbance of new tunnel construction to the existing tunnel and disturbance of dynamic load of existing tunnel traffic to new tunnel construction / operation) of the two tunnels is avoided; small vertical wells, small front and rear roadways and small left and right roadways are used as spaces for constructing various grouting steel pipes, on one hand, the construction does not disturb the existing tunnel, and construction of the door-shaped steel-concrete structure and tunnel excavation do not interfere with each other (can be carried out synchronously), so that the tunnel excavation period is not affected, and the problem that construction is not facilitated due to the fact that the terrain is complex can be avoided; and on the other hand, concrete can be poured into the small vertical wells, the small front and rear roadways and the small left and right roadways in the later period to form a supporting structure of a door-shaped steel-concrete structure, all the grouting steel pipes are connected into an integrated structure, and even if individual grouting steel pipes are loosened, the whole tunnel is not affected.

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): E21D9/00E21D11/14E21D11/18E21D11/10
CPCE21D9/001E21D11/14E21D11/18E21D11/10
Inventor 张刚
Owner CHINA RAILWAY 21ST BUREAU GRP TRACK TRAFFIC ENG
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