Application Analysis of Key Construction Technology of
Micangshan SuperLong Highway Tunnel

ZHANG Rui, ZHOU Kaige, YAO Zhigang, FANG Yong, TANG Xie, ZHOU Xionghua

doi:10.3973/j.issn.2096-4498.2021.S2.085

Tunnel Construction >

2021 , Vol. 41 >Issue S2: 664 - 674

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.S2.085

Application Analysis of Key Construction Technology of Micangshan SuperLong Highway Tunnel

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(1. Sichuan Road ＆ Bridge (Group) Co., Ltd., Deyang 618300, Sichuan, China; 2. School of Civil 
Engineering, Tianjin University, Tianjin 300352, China; 3. Key Laboratory of Transportation Tunnel Engineering 
of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 4. Sichuan 
Highway Planning, Survey, Design and Research Institute Ltd., Chengdu 610041, Sichuan, China; 5. Sichuan Bashan Expressway Co., Ltd., Chengdu 610041, Sichuan, China)

Online published: 2022-03-18

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Abstract

The Micangshan tunnel is an important project in the Bashan expressway. The maximum buried depth is 1 060 m and the total length is 13.8 km. It has the characteristics of huge engineering scale and complex geological conditions. Based on the actual construction of the Micangshan tunnel, the important and difficult points in the construction of Micangshan tunnel are introduced, including the issues in rapid longdistance tunnel construction, ventilation technology, high risk construction in the high ground stress rockburst section, and tunnel auxiliary structure construction. The results of rapid construction technology of superlong highway tunnels, blasting technology of high ground stress, ventilation technology of ultralong tunnel construction, design and construction technology of shafts, inclined shafts, underground fan rooms, connecting channel, and traffic transition zones, etc. formed in the tunnel construction are summarized.

Key words： superlong highway tunnel; rapid construction; rockburst; flexible protective net; construction ventilation; shaft construction; traffic transition zone

Cite this article

ZHANG Rui, ZHOU Kaige, YAO Zhigang, FANG Yong, TANG Xie, ZHOU Xionghua . Application Analysis of Key Construction Technology of Micangshan SuperLong Highway Tunnel[J]. Tunnel Construction, 2021 , 41(S2) : 664 -674 . DOI: 10.3973/j.issn.2096-4498.2021.S2.085

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