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

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

Tunnel Construction ›› 2021, Vol. 41 ›› Issue (S2): 664-674.DOI: 10.3973/j.issn.2096-4498.2021.S2.085

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

ZHANG Rui^{1, 2}, ZHOU Kaige³, YAO Zhigang³, FANG Yong^3，*, TANG Xie⁴, ZHOU Xionghua⁵

(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:2021-12-31 Published:2022-03-18

Abstract

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

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.

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[6]	DU Chuangdong, HONG Kairong, LI Zhijun, YANG Yandong. Key Technologies of Tunnel Boring Machine Passing through Unfavorable Geology： a Case Study of Entrance Section of a Plateau Railway Tunnel [J]. Tunnel Construction, 2022, 42(7): 1274-1288.
[7]	TIAN Qingfeng, YUAN Zhaohui, ZHANG Rui, YAO Zhigang, MA Zhiguo, FANG Yong. Rockburst Mechanism of Daxiagu Tunnel in Horizontal Rock Formation with High Crustal Stress [J]. Tunnel Construction, 2021, 41(S1): 223-.
[8]	TIAN Siming, WANG Wei, TANG Guorong, LI Xu. Study on Countermeasures for Major Unfavorable Geological Issues of Tunnels on SichuanTibet Railway [J]. Tunnel Construction, 2021, 41(5): 697-712.
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[11]	DU Lijie, HONG Kairong, WANG Jiaxing, LI Qingwei, YANG Yalei, LI Weiwei, HUANG Junge. Rockburst Characteristics and Prevention and Control Technologies for Tunnel Boring Machine Construction of Deepburied Tunnels [J]. Tunnel Construction, 2021, 41(1): 1-15.
[12]	CAI Jun, REN Zhenggang, WU Yunjie, SHEN Yupeng, LIU Yue. Numerical Simulation of Loading and Unloading Rockburst Failure Characteristics Based on PFC3D [J]. Tunnel Construction, 2020, 40(S1): 98-106.
[13]	ZHANG Junbo, HE Chuan, YAN Jian, WU Fangyin, MENG Wei. Discussion on the Applicability of XGBoost Algorithm Based on Cross Validation in Prediction of Rockburst Intensity Classification [J]. Tunnel Construction, 2020, 40(S1): 247-253.
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[15]	WEI Xinjiang， CHEN Taotao， WANG Xiao， YU Xingfu， ZHOU Lianying. Study of Prediction of Rockburst Intensity based on Gray Relation Projection Method [J]. Tunnel Construction, 2019, 39(S1): 25-31.

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

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