Settlement control method for shallow large-section loess tunnel

A loess tunnel and settlement control technology, which is applied to tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of chaotic settlement control methods for shallow-buried and large-section loess tunnels, and reduce road surface repairs and road slopes. The work of protection engineering, the effect of reducing the subsidence of the arch and reducing the impact

Inactive Publication Date: 2012-02-08
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0007] The invention provides a settlement control method of a shallow-buried large-section loess tunnel to sol

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  • Settlement control method for shallow large-section loess tunnel
  • Settlement control method for shallow large-section loess tunnel
  • Settlement control method for shallow large-section loess tunnel

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[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Aiming at the chaotic problem of the settlement control method of the existing shallow-buried large-section loess tunnel, the present invention creatively proposes a shallow-buried large-section loess tunnel control method, which is an improvement on the existing shallow-buried large-section loess tunnel settlement control method, so that The construction process is simplified, and the control effect on surface settlement is more significant.

[0034] The method used in the present invention will be described in detail below in conjunction with the embodiments of the present invention.

[0035] refer to figure 1 , provides the flow chart of the embodiment of the subsidence control method of the shallow-buried large-section...

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Abstract

The invention provides a control method for a shallow large-section loess tunnel. The method solves the problem of disorder of the conventional settlement control method for the shallow large-section loess tunnel. The method comprises the following steps of: determining a settlement control standard, and formulating a settlement management value; performing construction by adopting a double side wall pilot drift method, namely digging left and right side pilot tunnels, digging an upper step and a middle step on each side, digging an upper step, a middle step and a lower step on a middle pilot tunnel, reserving core soil during digging the side pilot tunnels and the middle pilot tunnel, and finally digging an inverted arch; implementing an advanced support method of a double-layer big tube shed and small conduits; and implementing a primary support method for arch foot reinforcement, wherein the arch foot reinforcement comprises a step of setting a lock pin anchor tube and a large arch foot. Compared with the similar tunnel surface settlement control method, the method has the advantages of effectively controlling the stability of a heading side, reducing the influence of construction on the ground surface, effectively controlling the ground surface settlement, simplifying the construction process and improving the efficiency.

Description

technical field [0001] The invention relates to the field of tunnel settlement control, in particular to a settlement control method of a shallow-buried large-section loess tunnel. Background technique [0002] Our country has started to build long-span railway tunnels since the 1960s, especially in the past 10 years, the excavation spans of several long-span tunnels have reached more than 20m. The construction of these long-span tunnels has promoted the development of long-span tunnel construction technology in China. Some foreign developed countries have also built many long-span tunnel projects, and have taken the construction technology of long-span tunnels as a key technical research project, especially in Japan, Europe and the United States and other countries. The excavation span of the three-lane highway tunnel has reached 21m. For example, the Engobe Mountain Tunnel, the largest expressway tunnel in Germany opened to traffic in 1998, has an excavation section of 26...

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Application Information

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IPC IPC(8): E21D9/01E21D11/18E21D21/00
Inventor 谭忠盛李健
Owner BEIJING JIAOTONG UNIV
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