Journal of Highway and Transportation Research and Development
 
Citation Search Quick Search DOI Advanced
Journal of Highway and Transportation Research and Development  2021, Vol. 15 Issue (4): 96-110    DOI:
Current Issue | Archive | Adv Search |
Field Investigations on Integrated Construction and Monitoring Technique for a Highway Tunnel Passing Through Soft Fractured Ground
ZHAO Cui, GAO Yong-tao, QI Wen-rui
Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China
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 wordstunnel 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)
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
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.
URL:  
http://journal10.magtechjournal.com/Jwk_gljtkj_en/EN/     OR     http://journal10.magtechjournal.com/Jwk_gljtkj_en/EN/Y2021/V15/I4/96
Copyright © Journal of Highway and Transportation Research and Development
Supported by: Beijing Magtech