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MODERN TUNNELLING TECHNOLOGY 2011, Vol. 48 Issue (2) :87-93    DOI:
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Construction Techniques of Shallow and Uneven-pressured Xinzhai Tunnel Entrance
(Construction Headquarters of Lanzhou-Chongqing Railway, China Railway No.13 Construction Bureau Group Co., Ltd.,
Dangchang  748500)
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Abstract Xinzhai tunnel is embedded in fold system of West Qinling with developed joints and broken rocks. The entrance section of it locates on the left margin of landslip with a minimum overburden of 13~18m, and a gully was developed at the left side of tunnel portal. It is difficult for the safe construction under the condition of uneven pressure, shallow overburden and soft rock. The whole working process has been recorded, analyzed and summarized in detail based on the  Xinzhai tunnel practice with experience accumulated to serve guidance for similar projects.
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Articles by authors
LIU Yu-Qing
Jiang-Jun-Feng
Shao-Da-Peng
Zeng-You-Ping
Zheng-Yun-Cheng
Keywords：  Tunnelling   Shallow depth and uneven presssure   Construction technique     
Abstract： Xinzhai tunnel is embedded in fold system of West Qinling with developed joints and broken rocks. The entrance section of it locates on the left margin of landslip with a minimum overburden of 13~18m, and a gully was developed at the left side of tunnel portal. It is difficult for the safe construction under the condition of uneven pressure, shallow overburden and soft rock. The whole working process has been recorded, analyzed and summarized in detail based on the  Xinzhai tunnel practice with experience accumulated to serve guidance for similar projects.
Keywords：  Tunnelling,   Shallow depth and uneven presssure,   Construction technique     
published: 2011-03-05
Cite this article:   
LIU Yu-Qing, Jiang-Jun-Feng, Shao-Da-Peng etc .Construction Techniques of Shallow and Uneven-pressured Xinzhai Tunnel Entrance[J]  MODERN TUNNELLING TECHNOLOGY, 2011,V48(2): 87-93
URL:  
http://www.xdsdjs.com/EN/      或     http://www.xdsdjs.com/EN/Y2011/V48/I2/87
　
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