Construction methods for unfavorable geology in tunnel engineering in high altitude areas

A technology for tunnel engineering and construction methods, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as lack of experience in building such tunnel engineering, reduce damage and construction risks, improve adaptability, and improve self-supporting. effect of ability

Active Publication Date: 2020-06-12
RAILWAY NO 5 BUREAU GRP FIRST ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the unique regional environment, high altitude, high cold and other harsh conditions, and the lack of engineering experience in building such tunnels in China, it is urgent to solve the problems and defects in this area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A construction method aimed at unfavorable geology in tunnel engineering in high altitude areas, including the following steps:

[0032] (1) Provide advanced geological reports; use geological radar to conduct advanced geological forecasts, collect data along the survey line, and continuously detect to obtain radar reflection profiles, thereby providing recommended surrounding rock levels and bad geological bodies in front of tunnel excavation work Forecast and the hydrogeological conditions in front of the master and the possible water inrush forecast;

[0033] (2) Advance support construction; use advanced bolts with a diameter of 30-35mm to lock the surrounding rock in front of the tunnel. The length of the advanced bolts is 4-4.5m, and the insertion angle is adjusted according to the actual situation. Ensure that a part of the anchor rod remains in the rock mass after a cycle of blasting to strengthen the tunnel face;

[0034] (3) Tunnel excavation; multiple drilling hole...

Embodiment 2

[0048] A construction method aimed at unfavorable geology in tunnel engineering in high altitude areas, including the following steps:

[0049] (1) Provide advanced geological reports; use geological radar to conduct advanced geological forecasts, collect data along the survey line, and continuously detect to obtain radar reflection profiles, thereby providing recommended surrounding rock levels and bad geological bodies in front of tunnel excavation work Forecast and the hydrogeological conditions in front of the master and the possible water inrush forecast;

[0050] (2) Advance support construction; use advanced bolts with a diameter of 30-35mm to lock the surrounding rock in front of the tunnel. The length of the advanced bolts is 4-4.5m, and the insertion angle is adjusted according to the actual situation. Ensure that a part of the anchor rod remains in the rock mass after a cycle of blasting to strengthen the tunnel face;

[0051] (3) Tunnel excavation; multiple drilling hole...

Embodiment 3

[0073] A construction method aimed at unfavorable geology in tunnel engineering in high altitude areas, including the following steps:

[0074] (1) Provide advanced geological reports; use geological radar to conduct advanced geological forecasts, collect data along the survey line, and continuously detect to obtain radar reflection profiles, thereby providing recommended surrounding rock levels and bad geological bodies in front of tunnel excavation work Forecast and the hydrogeological conditions in front of the master and the possible water inrush forecast;

[0075] (2) Advance support construction; use advanced bolts with a diameter of 30-35mm to lock the surrounding rock in front of the tunnel. The length of the advanced bolts is 4-4.5m, and the insertion angle is adjusted according to the actual situation. Ensure that a part of the anchor rod remains in the rock mass after a cycle of blasting to strengthen the tunnel face;

[0076] (3) Tunnel excavation; multiple drilling hole...

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PUM

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Abstract

A construction method for unfavorable geology during tunnel engineering in high-altitude areas includes the following steps that (1) an advanced geological report is provided; (2) advanced supportingconstruction is carried out; (3) tunneling is carried out; (4) drainage treatment is performed for surge water; (5) initial supporting construction is performed; (6) after initial supporting is completed, grouting reinforcement is conducted at the position with large arch crown and haunch deformation; (7) a waterproof layer is laid on the surface of low-temperature concrete, and geotechnical clothis used for protection; and (8) an inverted arch and a second lining are constructed. According to the construction method, the damage degree and construction risks of unfavorable geology to tunnel construction are effectively reduced, construction safety is ensured, a large amount of precious experience is provided for high-altitude tunnel design and construction, and beneficial guidance and reference effects are achieved for tunnel design construction in high-altitude and alpine areas.

Description

Technical field [0001] The invention relates to the technical field of tunnel engineering construction, in particular, to a construction method aimed at bad geology in tunnel engineering in high altitude areas. Background technique [0002] With the development of society and economy, there are more and more deep linear rock projects such as tunnels, and the depth is also increasing. The development and construction of the transportation infrastructure and hydropower resources in western my country, especially in the southwest region, has entered its heyday, and the scale of related transportation facilities upgrades, renovations, and development has continued to increase. High-altitude areas have been built, soon to be completed, and planned and built. More and more tunnels. The southwestern plateau of my country is formed by the compression of the Eurasian continental plate and the Indian Ocean plate. The geological age is new and the plate tectonics are active. As the depth of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/00E21F16/02E21D11/10E21D11/38F42D3/04
CPCE21D9/00E21D9/006E21D11/003E21D11/10E21D11/38E21D11/383E21F16/02F42D3/04
Inventor 彭学军朱胥仁刘柏汐杨文国汤宇杨俊峰杨曾李一萍吴彪曹振兴彭雨杨方星桦陈佐林谭鹰苗永旺李传书
Owner RAILWAY NO 5 BUREAU GRP FIRST ENG CO LTD
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