Field Investigations on Integrated Construction and Monitoring Technique for a Highway Tunnel Passing Through Soft Fractured Ground

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Abstract Disasters such as collapse and water inrush are prone to occur when tunnel crosses the soft fault fractured ground. To settle the difficulties encountered in the construction of a highway tunnel crossing the F139 fault broken zone, the comprehensive advanced geological predictions, construction measures and real-time monitoring and measuring systems are conducted in field using tunnel seismic prediction (TSP), ground penetrating radar (GPR), three-bench seven-step method, 3D laser scanning technology, etc. The results demonstrate that the tunnel, starting from the mileage YK20+490, will get into the core influence zone of the F139 weakly fault broken zone. The development of the fractured structural surface and the water-rich condition are in front of the working face visually characterized based on comprehensive geological prediction. Ensuring that the tunnel passes through the F139 fault fractured zone with smoothness and safety, the implementation of comprehensive construction measures effectively curbs the occurrence of disasters of collapse and water inrush in tunneling. According to the comprehensive monitoring and measuring systems, the vault settlement and the horizontal convergence both show a sharp increase firstly, then remain a steady trend, followed by a slowly increase, and finally a stabilization. The maximum vault settlement and convergence displacements are 39.1 mm and 37.5 mm, respectively, which meets the allowable deformation specifications. After 15 days of excavation and support, the accumulated deformation of the surrounding rock shows a law of first increasing and then decreasing from the left wall to the vault to the right wall. The deformation near the vault is the largest with 21~23 mm, and the deformation near the side wall is the smallest with only 4 mm.

Key words： tunnel engineering disaster treatment field tests fault fracture zone comprehensive advanced geological prediction grouting reinforcement 3D laser scanning

Received: 26 July 2021

Fund:Supported by the the National Natural Science Foundation of China (No.51674015)

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	ZHAO Cui
	GAO Yong-tao
	QI Wen-rui

Cite this article:

ZHAO Cui,GAO Yong-tao,QI Wen-rui. Field Investigations on Integrated Construction and Monitoring Technique for a Highway Tunnel Passing Through Soft Fractured Ground[J]. Journal of Highway and Transportation Research and Development, 2021, 15(4): 96-110.

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http://journal10.magtechjournal.com/Jwk_gljtkj_en/EN/ OR http://journal10.magtechjournal.com/Jwk_gljtkj_en/EN/Y2021/V15/I4/96

[1] QIAN Qi-hu. Challenges Faced by Underground Projects Construction Safety and Countermeasures[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(10):1945-1956. (in Chinese)
[2] ZHANG Qing-song, HAN Wei-wei, LI Shu-cai, et al. Comprehensive Grouting Treatment for Water Gushing Analysis in Limestone Breccias Fracture Zone[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(12):2412-2419. (in Chinese)
[3] ZHANG Jian-ru. Grouting Technology for Construction of Mountain Tunnel in High-pressure Water-rich Fault Fracture Zone[J]. Journal of Railway Engineering Society, 2010, 27(5):58-62. (in Chinese)
[4] LI Li-ping, LI Shu-cai, ZHAO Yong, et al. Spatial Deformation Mechanism and Load Release Evolution Law of Surrounding Rock During Construction of Super-Large Section Tunnel with Soft Broken Surrounding Rock Masses[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(10):2109-2118. (in Chinese)
[5] WANG Zhang-qiong, YAN E-chuan, WANG Ya-jun. Mechanism and Treatment Technology of Collapse and Water Inrush in Fault Zone Schist Tunnel[J]. Construction Technology, 2018, 47(24):5-8. (in Chinese)
[6] ZHOU Yi, LI Shu-cai, LI Li-ping, et al. Study of Influence of Formation Conditions on Construction Process Rules of Ultralarge Section and Weak Broken Wall Rock Tunnel by Numerical Simulation[J]. Rock and Soil Mechanics, 2011, 32(S2):673-678. (in Chinese)
[7] MA Dong, YAN Su, WANG Wu-xian. Construction Technology of Large-Scale Water-Rich Fault and Fractured Zone in LongNan Tunnel on Jiangxishenzhen High-Speed Railway[J]. Tunnel Construction, 2020, 40(11):1634-1641. (in Chinese)
[8] ZHU He-hua, HUANG Feng, XU Qian-wei. Model Test and Numerical Simulation for Progressive Failure of Weak and Fractured Tunnel Surrounding Rock under Different Overburden Depths[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(6):1113-1122. (in Chinese)
[9] GONG Cheng-ming, MENG Qing-yu, LI Wu-hong. Safe Construction Techniques for Tunnels Passing through Fractured Fault Zone[J]. Journal of Railway Engineering Society, 2012, 29(5):45-48, 100. (in Chinese)
[10] LI Yu-sheng, WENG Xian-jie, WANG Ren-jie, et al. Experimental Study on Simulating Mechanism of Water and Mud Inrush in Tunnel Crossing Fault Fracture Zone[J]. Journal of Highway and Transportation Research and Development, 2020, 37(12):89-99. (in Chinese)
[11] KIMURA F, OKABAYASHI N, KAWAMOTO T. Tunnelling Through Squeezing Rock in Two Large Fault Zones of the Enasan Tunnel II[J]. Rock Mechanics and Rock Engineering, 1987, 20(3):151-166.
[12] LEI Jun, ZHANG Jin-zhu, LIN Chuan-nian. Analysis of Stress and Deformation Site-Monitoring in Fault Zone of WuShaoLing Tunnel under Complex Geological Conditions[J]. Rock and Soil Mechanics, 2008(5):1367-1371. (in Chinese)
[13] LI Shu-cai, LIU Bin, SUN Huai-feng, et el. State of Art and Trends of Advanced Geological Prediction in Tunnel Construction[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(6):1090-1113. (in Chinese)
[14] HAN Kan, WANG Bing-yong. Research on the Data Analysis and Detection Technology of TSP Advance Forecast[J]. Journal of Railway Engineering Society, 2020, 37(3):72-77. (in Chinese)
[15] CAO Geng-ren, JIANG Shu-ping, TAN Xiu-mei, et al. Application of Ground Penetrating Radar and TGP206 in Advanced Geological Forecast for Chuyang Tunnel[J]. Journal of Highway and Transportation Research and Development, 2012, 29(12):107-113, 124. (in Chinese)
[16] CHEN Jie-jin, GAO Chao, JIN Wan-qing, et al. Comparative Study on Adaptability Analysis of Three Benching Seven Steps and Temporary Invert Method for Large-Section Tunnel in Soft Stratum[J]. Engineering Mechanics, 2020, 37(S1):180-186. (in Chinese)
[17] XU Lei, WU Jian-xin, JIAO Heng-xin, et al. Comprehensive Analysis on Monitoring and Measurement of Highway Tunnel under Complicated Geological Conditions Based on Convergence Constraint Principle[J]. Railway Construction Technology, 2018(12):24-28, 33. (in Chinese)
[18] JIANG Teng-jiao, CHU Xi, TANG Jian, et al. An Overall Deformation Monitoring Method of Structure Based on Tracking Deformation Contour[J]. Journal of Highway and Transportation Research and Development, 2019, 36(6):48-57. (in Chinese)
[19] ZHANG Hui, LI Kai. Application Research of 3D Laser Scanning Technology in Construction Monitoring of Highway Tunnels[J]. Highway Engineering, 2018, 43(4):230-234, 268. (in Chinese)
[20] LIANG Dong, ZHANG Shuo, ZHAO Kai, et al. A 3D Laser Scanning Method for Detecting Overall Configuration of a Pedestrian Bridge[J]. Journal of Highway and Transportation Research and Development, 2020, 37(9):57-66. (in Chinese)