Tunnel construction method with shield methodand new Austrian tunneling method being combined

A technology of tunnel construction and new Austrian method, which is applied in the direction of tunnel, tunnel lining, earthwork drilling and mining, etc. It can solve the problems of high construction cost, high safety risk and low construction efficiency of new Austrian method by shield tunneling method, and improve the working environment Quality, rapid construction, and the effect of reducing the intensity of manual work

Active Publication Date: 2016-08-17
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a tunnel construction method combining the shield tunneling method and the new Austrian method, which solves the problems of low construction efficiency and high safety risks of the new Austrian method and high construction cost of the shield method, and combines the safe and rapid excavation of the shield tunneling method with the new tunnel method. Combining the economical and reasonable advantages of the Austrian lining structure, according to the principle of "quick excavation, fast support, and fast closure" in the construction of soft rock tunnels by the new Austrian method, the mechanization of soft rock tunnels can be guaranteed quickly without changing the existing tunnel structure design. Excavation, the initial support quickly closed into a ring, to achieve the goal of fast, safe and economical tunnel construction

Method used

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  • Tunnel construction method with shield methodand new Austrian tunneling method being combined
  • Tunnel construction method with shield methodand new Austrian tunneling method being combined

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Embodiment 1

[0025] Embodiment 1: A tunnel construction method combining shield tunneling and new Austrian method, the steps are as follows:

[0026] Step S1, tunnel excavation. A non-explosive excavation of one excavation length of the tunnel to be excavated is carried out using a shield machine. According to the self-stability of the surrounding rock, the excavation method is divided into partial excavation and full-face excavation. When the self-stability of the surrounding rock is good, the open shield machine is used in combination with rock and soil excavation equipment to excavate the tunnel face in sections by using the step method. The excavation equipment includes an excavator and a cantilever roadheader. Under the protection of the shield shell of the open shield machine, when the surrounding rock is earthy, the excavator is used to excavate the face of the tunnel in sections; When the rock is rocky surrounding rock, the cantilever roadheader is used to excavate the tunnel fac...

Embodiment 2

[0038] Embodiment 2: The present invention will be further described in detail below by taking a double-track railway tunnel project in a typical loess stratum as an example.

[0039] Such as figure 1As shown, the tunnel is in the loess layer without groundwater. The grade of the surrounding rock is mainly grade IV, and the section is horseshoe-shaped, with a width of 14.5m and a height of 12m (including the inverted arch). The whole ring of the tunnel adopts I22a steel arch frame, and the distance between arch frame 1 is 0.8m. The sprayed concrete is C25 concrete with a thickness of 30cm; the length of the side wall anchor rod is 3.0m, and the length of the lock foot anchor pipe is 4m. Each longitudinal connecting bar is 102cm long, and the circumferential spacing is 1m.

[0040] The steps of adopting this method construction are as follows:

[0041] Step S1, using the open shield machine to excavate the tunnel in sections with an excavation length by using the step metho...

Embodiment 3

[0050] Embodiment 3: The present invention will be further specifically described below by taking a single-track railway tunnel project in a V-level argillaceous shale stratum with poor self-stability of the surrounding rock as an example.

[0051] Such as figure 2 As shown, the section is horseshoe-shaped, with a width of 9m and a height of 10m (including the inverted arch). For a small amount of groundwater, use a closed shield machine for full-face excavation. The construction steps are as follows:

[0052] In step S1, a full-section excavation of an excavation length is performed on the tunnel with a closed cutter head. On the cutter head 11 of the closed shield machine, there are tools for excavating rock and soil. Through the rotation of the cutter head 11, the rock and soil on the face of the tunnel are cut off, and the cut rock and soil blocks are discharged through the slag discharge system. Each excavation footage is an arch frame.

[0053] In step S2, initial s...

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Abstract

The invention discloses a tunnel construction method with a shield method and a new Austrian tunneling method being combined. The tunnel construction method comprises the following steps: S1, excavating a tunnel; S2, carrying out preliminary bracing construction; S3, pushing a shield tunneling machine ahead for an excavation length; S4, repeating the step from S1 to the step S3, carrying out tunnel excavation cycle operation till the tunnel runs through, wherein pavement of waterproof boards in the tunnel and secondary lining construction are carried out in the tunnel excavation process. According to the tunnel construction method disclosed by the invention, the new Austrian tunneling method construction and the shield mehtodconstruction are beneficially combined to realize safe and fast construction of the tunnel, and meanwhile, the tunnel construction cost is controlled to be within an economic and reasonable range. Due to the adoption of fully-mechanized operation, the manual operation intensity is greatly reduced, the safety of a tunnel operation environment is guaranteed powerfully, and the quality of the operation environment is remarkably improved.

Description

technical field [0001] The patent of the invention relates to a tunnel construction method combining the shield tunneling method and the new Austrian method, which belongs to the field of underground engineering. Background technique [0002] At present, the new Austrian method or the shield method is generally used for tunnel construction in soft rocks with no or little groundwater (surrounding rocks of grades IV and V, soil and rocky strata). [0003] The new Austrian method is based on the maintenance and utilization of the self-supporting capacity of the tunnel surrounding rock, using bolts and shotcrete as the main support means to support in a timely manner to control the deformation and relaxation of the surrounding rock, so that the surrounding rock becomes the tunnel support. It is an integral part of the protection system, and guides the methods and principles of tunnel construction and underground engineering design and construction through the measurement and mon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/08E21D9/087E21D11/10E21D11/18E21D11/38E21D20/00
CPCE21D9/00E21D9/0607E21D9/08E21D11/10E21D11/107E21D11/18E21D11/38E21D20/00
Inventor 李建斌高毅于少辉李洋王全胜刑泊范磊肖威董艳萍刘娇李辉程鹏
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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