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Non-excavation ecological construction method for tunnel

A construction method and non-excavation technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve environmental problems and serious safety problems, and achieve the effects of preventing rolling stones and falling objects, reducing damage, and high efficiency

Pending Publication Date: 2020-05-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environmental and safety problems caused by it are relatively serious

Method used

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  • Non-excavation ecological construction method for tunnel
  • Non-excavation ecological construction method for tunnel

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Embodiment Construction

[0033] In traditional water conservancy and hydropower engineering construction, mining, road and bridge tunnels and other projects, the part where the tunnel connects with the mountain is often excavated on side slopes and upside slopes, and reinforced with anti-slide piles and prestressed anchor cables.

[0034] According to the "Code for Design of Highway Tunnels JTG D70-2004", the buried depth boundary of the cavern is judged according to the equivalent height of the load, and the formula is:

[0035] h p =(2~2.5)h q

[0036] Where: H p — Depth of boundary of shallow buried tunnel (m);

[0037] h q ——load equivalent height (m), calculated according to the following formula:

[0038]

[0039] q——vertical uniform pressure (kN / m 2 );

[0040] γ - weight of surrounding rock (kN / m 3 ).

[0041] H is taken from grade IV~VI surrounding rock p =2.5h q

[0042] H is taken as the surrounding rock of grade I~III p = 2h q

[0043] Assuming that the quality grade of t...

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Abstract

The invention discloses a non-excavation ecological construction method for a tunnel, and belongs to the technical field of geotechnical engineering. The method comprises the following steps that a grouting hole is arranged at an opening of the tunnel to be excavated along the excavation direction of a cavity of the tunnel to be excavated from top to bottom; the grouting hole is filled with reinforcing auxiliary materials; after the reinforcing auxiliary materials are stabilized in the grouting hole, a working surface is excavated at the intersection of the entrance of the tunnel to be excavated and a mountain body; and excavation is carried out along a preset direction of the cavity to be excavated by taking the working surface as a starting position to obtain the target tunnel. The method is not only more environmentally friendly, but also can enhance the safety of the tunnel.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a non-excavation ecological construction method for tunnels. Background technique [0002] In the prior art, in the construction of water conservancy and hydropower projects, mining, road and bridge tunnels and other projects, the part where the tunnel is connected with the mountain is often excavated on a side slope or an upside slope, and reinforced with anti-slide piles and prestressed anchor cables. The environmental problems and safety problems caused by it are relatively serious. Contents of the invention [0003] In view of this, the present invention provides a trenchless ecological tunnel construction method, which is not only more friendly to the environment, but also enhances the safety of the tunnel, thus being more suitable for practical use. [0004] In order to achieve the above object, the technical scheme of the tunnel trenchless ecological co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21D11/10
CPCE21D9/14E21D11/10
Inventor 段云岭魏雪斐彭振华冯金铭李俊彦
Owner TSINGHUA UNIV
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