Tunnel construction structure for draining and desilting

A technology for tunneling and sedimentation, applied in tunnels, drainage, safety devices, etc., can solve the problems of large negative impact on environmental protection, long construction period and high investment, and achieve the effects of reduced project investment, short construction period and quick effect.

Inactive Publication Date: 2012-10-10
2ND ENG CO LTD OF CHINA RAILWAY 12TH BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the disadvantages of long construction period, high investment, and large negative impact on environmental protection in conventional drainage tunnels, the present invention provides a new type of construction structure for drainage and sedimentation of tunnels

Method used

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  • Tunnel construction structure for draining and desilting
  • Tunnel construction structure for draining and desilting
  • Tunnel construction structure for draining and desilting

Examples

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example 1

[0025] Project Overview

[0026] Baojiashan Tunnel: It is a controlled project from Xiao (he) to (An)kang section of Baomao Expressway, with a total length of 11.2 kilometers. The entrance of the tunnel is located at Tongmugou, Xunyang County, and the exit is located at Chaijia River in Ankang City, crossing the South Qinling Mountains. The two peaks of the mountain range, Qingshan and Yuhuangshan, the tunnel crosses 37 faults, 3 large fold belts, and 25 gushing sections. The surrounding rock of the tunnel is mainly schist and phyllite, and layered limestone is distributed in the middle section of the tunnel. During the construction phase, shaft No. 1 and inclined shaft No. 3 need to be used to undertake the construction tasks of 4.1 main tunnel; however, since shaft No. 1 and inclined shaft No. 3 of the Baojiashan Tunnel are located in the limestone section of the middle section, the tunnel has been caused by surface rainfall since the start of construction There have been seve...

example 2

[0035] Project Overview

[0036] The Mixiliang Tunnel is a key control project of the Baotou-Maoming Expressway (G65) Shaanxi Jingankang-Ziyang section of the national expressway network. It is a curved tunnel with left and right lines. The tunnel is 7928 meters in length and is an extra-long two-lane expressway. Highway tunnel. After the right tunnel was excavated to YK242+575, the water inflow of the cavern suddenly increased and a landslide was formed. The water gushing section was affected by the F242-1 fault on the north side of the regional fault F4-6. The surrounding rock fissures were relatively developed, and the rock mass Relatively broken, the fracture structure forms a permeable water channel. The measured water inflow at the tunnel face of the fault zone is 16,946 meters 3 / day. In order to complete the excavation of the main tunnel and serve the operational needs, after repeated field studies, it was decided to deal with the construction structure according to th...

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Abstract

The invention belongs to the field of tunnel construction, and particularly relates to a tunnel construction structure for draining and desilting. The invention aims to solve the problems of long construction period, high investment and adverse impact on environmental friendliness of the conventional draining holes. The structure comprises draining and desilting chambers which are arranged between two main tunnel holes at intervals, lower than the designed elevation of a tunnel and longitudinally arranged along a central line of the tunnel, wherein the outlet of each draining and desilting chamber is provided with a draining and desilting basin communicated with a tunnel drainage system; both ends of the draining and desilting basin are provided with counter-slope type sand draining passages; and the inner wall of the draining and desilting chamber is annularly provided with multiple radial umbrella-like draining and decompression drill holes extending outward. The tunnel construction structure solves the problem that a tunnel structure and the drainage system are destroyed by karst mud and water gushing, and has the advantages of short construction period, small investment, rapid effectiveness, environmental friendliness and the like in the construction process, so that the structure can be widely popularized and used.

Description

Technical field [0001] The present invention involves the construction of tunnel construction, which is specifically for a construction structure of a tunnel leakage of sinking sand ponds. Background technique [0002] To build a tunnel in the limestone area, the primary geological disaster encountered in the limestone area is the pouring water, and the underground engineering community at home and abroad has paid a painful price for this.The geological structure of Baojiashan Tunnel is special, the terrain is sunken, the lying rock cracks and gaps are developed. The tunnel is in the rock -soluble water storage structure. It is connected to the surface water.Great relationship.After analysis and demonstration, most of the current governance schemes of "surface rectification and water blocking water in the cave" are used to implement river spreads on the top of the cave on the top of the cave.The effectiveness.After completing the paving of the river, the long -dry river channels ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/14E21F16/02
Inventor 胡平雷军杨育生段小平赵香萍朱绪飞肖辰裕田晓峰刘丽花
Owner 2ND ENG CO LTD OF CHINA RAILWAY 12TH BUREAU GRP
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