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Underground excavation construction deformation control method for three-hole small clear distance tunnel underpass trunk railway

A deformation control, small clear distance technology, applied in tunnels, earth-moving drilling, mining equipment, etc., to achieve the effect of simple operation, ensuring operational safety, and ensuring operational safety

Active Publication Date: 2013-10-30
中铁六局集团石家庄铁路建设有限公司 +1
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a deformation control method for underground excavation construction of a three-hole small-space tunnel passing under a railway trunk line. This method can realize the underpassing of the three-hole tunnel without interrupting the train running. Guarantee the operational safety of existing lines and the stability of tunnel structures

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  • Underground excavation construction deformation control method for three-hole small clear distance tunnel underpass trunk railway

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example 1

[0050] The railway mileage at the intersection of the center line of the tunnel and the upward line of a certain railway is: K88+056.20, and the angle between the tunnel axis and the railway axis is 87°. This project includes the main works of open and concealed excavation tunnels. The height from the tunnel vault to the ground is 2m, and the height from the railway shoulder is 4.33m. The length of the single-bore tunnel is 42m, of which the length of the underground excavation section is 32m, and the length of the open excavation section is 10m. The underground section of the 3-hole tunnel is 96m in total, and the open excavation section is 30m in total.

[0051] The distance between the upper and lower lines of the railway is 4.27m, the track surface elevation of the up line is 12.14m, and the longitudinal slope of the line is 3‰; the track surface elevation of the down line is 12.14m, and the longitudinal slope of the line is 3‰; The slope ratio is 1:1.5. The railway is ...

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Abstract

The invention discloses an underground excavation construction deformation control method for a three-hole small clear distance tunnel underpass trunk railway, and belongs to the technical field of tunnel (hole) shallow buried soil stratum construction. Firstly, construction surface subsidence control standards are determined according to the requirement of an existing trunk railway for track smoothness; secondly, construction schemes and construction parameters of the three-hole tunnel are tested and determined by the aid of three-dimensional finite element static and dynamic numerical values. Construction includes the steps: reinforcing lines; grouting and reinforcing the earth surface; constructing an advanced tube screen; constructing a tunnel portal; constructing a tunnel crevasse; grouting and reinforcing side walls and tunnel faces; excavating the tunnel; supporting the tunnel; forming a secondary liner of the tunnel; recovering the lines, and monitoring measurement is performed in the whole construction process. Construction quality is strictly controlled according to a predetermined scheme and process in the construction process, the construction parameters are timely fed back and adjusted by the aid of an information construction technology, and operation safety of existing lines and structural stability of the tunnel are guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel (cave) shallow-buried soil stratum construction, in particular to a method for controlling the deformation of underground excavation construction of a three-hole small-space tunnel passing under a railway trunk line. Background technique [0002] With the development of infrastructure construction, the interaction between various projects and indirect construction is becoming more and more serious. It is inevitable for the water main canal to cross the existing railway, and it is a new topic to ensure the construction safety and railway operation safety during the passage of the tunnel. [0003] When the construction tunnel passes under the railway, it will inevitably have adverse effects on the main railway line, such as uplift and settlement. In order to ensure the safety of tunnel construction and railway traffic, the measures taken in the existing construction methods include: strictly control...

Claims

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Application Information

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IPC IPC(8): E21D9/00
Inventor 董会川路亮王青俭蔡忠泽张洪刘振华刘畅崔雄飞
Owner 中铁六局集团石家庄铁路建设有限公司
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