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Damping structure of up-down cross tunnel and construction method thereof

A cross-tunnel and tunnel construction technology, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of surrounding rock stability and complex force of supporting structures, weakened seismic performance of tunnel structures, and affecting the safety of underground transportation systems, etc. problems, to achieve the effect of improving the overall waterproof performance, reducing mutual influence, and increasing the length

Active Publication Date: 2015-10-28
NANJING GEOTECHNICAL & UNDERGROUND SPACE TECH CO LTD
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Problems solved by technology

However, due to the small distance between the crossing tunnels, they will be disturbed many times during the construction process, making the stability of the surrounding rock and the force of the supporting structure more complicated, and due to the interaction between the upper and lower tunnels, the seismic resistance of the tunnel structure Weakened performance, affecting the safety of the underground transit system

Method used

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  • Damping structure of up-down cross tunnel and construction method thereof
  • Damping structure of up-down cross tunnel and construction method thereof
  • Damping structure of up-down cross tunnel and construction method thereof

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Embodiment Construction

[0030] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] A shock-absorbing structure for an up and down intersecting tunnel according to the present invention, which includes a lining segment structure 1 surrounding the inner layer of the tunnel under construction, and the lining segment structure 1 is composed of a low Z-shaped segment 11, a high Z-shaped segment 12 and T-shaped transfer segments 13 are stacked. The high Z-shaped segment 12 is stacked at a certain distance from the tunnel under construction to the original tunnel to make the tunnel under construction produce a small inclination angle, and to increase the distance between the tunnel under construction and the original tunnel. There is a clear height difference between the tunnels to reduce the mutual influence between the upper tunnel and the lower tunnel, and the shock absorbing layer 3 is set on the side close to the original...

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Abstract

The invention discloses a damping structure of up-down cross tunnels. The structure comprises a lining segment structure surrounding the inner layer of an under-construction tunnel. The lining segment structure is formed by overlaying dwarf Z-shaped duct pieces, high-type Z-shaped duct pieces, and T-shaped transfer duct pieces. When the under-construction tunnel is constructed to the position where a certain distance is between the under-construction tunnel and an original tunnel, the high-type Z-shaped duct pieces are used to overlay to make the under-construction tunnel generate small inclination strike, and clear height difference between the under-construction tunnel and the original tunnel is increased. When the under-construction tunnel is constructed to the position where a certain distance is between the under-construction tunnel and the original tunnel, a damping layer is arranged close to the side of the original tunnel. The damping structure is advantaged by high anti-seismic property and high security, and reducing vibration influence of transport vehicles on the tunnel structure.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an upper and lower intersection tunnel damping structure and a construction method thereof. Background technique [0002] The cross tunnel is a special type of tunnel structure, in which two tunnel structures cross each other at a certain angle. Since it is not restricted by terrain conditions and the overall line shape, it is especially suitable for tunnel structures in urban subway cross-line rail transit. However, due to the small distance between the crossing tunnels, they will be disturbed many times during the construction process, making the stability of the surrounding rock and the force of the supporting structure more complicated, and due to the interaction between the upper and lower tunnels, the seismic resistance of the tunnel structure The performance is weakened, which affects the safety of the underground transportation system. Contents of the inven...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/08
Inventor 左熹倪红顾荣蓉周桂云
Owner NANJING GEOTECHNICAL & UNDERGROUND SPACE TECH CO LTD
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