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Beneath-soil through-tunnel superlarge diameter pipe curtain construction method

A technology with super large diameter and construction method, applied in tunnels, earthwork drilling, tunnel lining, etc., can solve the problems of difficult-to-adjacent buildings, road protection, etc., and achieve the effect of avoiding disturbance, ensuring drilling accuracy and hole quality.

Active Publication Date: 2010-06-16
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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AI Technical Summary

Problems solved by technology

In the construction of the tunnel under the soil, in order to ensure the construction quality, the tunnel advance support project will be adopted. At present, the tunnel generally adopts the Φ108mm pipe curtain for the advance support. The advanced support method is difficult to effectively protect the adjacent buildings and roads

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  • Beneath-soil through-tunnel superlarge diameter pipe curtain construction method
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  • Beneath-soil through-tunnel superlarge diameter pipe curtain construction method

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Embodiment Construction

[0032] In order to further illustrate the present invention, each step of the present invention is described in detail through the following examples, but the protection scope of the present invention is not limited to the description of the following examples.

[0033] Located in Anshan City, Liaoning Province, the Anshan Tunnel of the Harbin-Dalian Railway Passenger Dedicated Line is a double-track underpass tunnel with a total length of 2440m and a clearance area of ​​100m 2 . The underground excavation section is 50m below the special line of the army railway, where the stratum is silty clay and silt, the thickness of the tunnel top cover soil is 4-5m, and the maximum excavation depth is about 18.2m. In order to control the settlement of the ground during the tunnel construction, especially the special line for troops, the maximum span outside the excavation contour of the underground excavation section is protected by Φ300 (wall thickness 10mm) pipe curtain in advance gro...

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Abstract

The invention discloses a beneath-soil through-tunnel superlarge diameter pipe curtain construction method. The method comprises the following construction steps of: preparation, measurement and positioning, guide hole drilling, process correction, reaming and pipe drawing, hole cleaning and pipe curtain grouting. In the method, the guide hole is constructed in a soil layer first, and a steel tube in superlarge diameter is drawn in the guide hole in a mode of reaming and drawing the tube at the same time, so that the disturbance on the soil layer in construction is effectively avoided; and a wedge-shaped drill bit provided with a guide plate is used for the process correction in the construction of the guide hole, so that the drilling precision and the hole forming quality are highly guaranteed. In the construction, the sedimentation of the soil mass on the middle-upper part meets the safety requirements of the existing line. After excavation, the steel pipes are nearly flat and straight, no phenomenon of level-crossing and interchanging occurs and the construction method of the invention creates conditions for water resistance and lining construction of the tunnel.

Description

technical field [0001] The invention relates to a super-large-diameter pipe-curtain construction method for a tunnel under soil, in particular to a super-large-diameter pipe-curtain construction method with a steel pipe diameter greater than 108 mm. Background technique [0002] With the rapid development of high-speed railway construction and the advancement of engineering design and construction technology, the level of railways has been continuously improved, and construction conditions have become more and more restricted. In the construction of the tunnel under the soil, in order to ensure the construction quality, the tunnel advance support project will be adopted. At present, the tunnel generally adopts the Φ108mm pipe curtain for the advance support. It is difficult to effectively protect adjacent buildings and roads by advanced support methods. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a construct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10E21B7/10E21D11/10
Inventor 罗久旭陈拥军陈登云李远禄谢方成邵勇
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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