1. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang Jiangxi 330013, China;
2. School of Civil Engineering, Central South University, Changsha Hunan 410075, China
Research on Pre-reinforced Regions and Strength Parameters of Shallow Tunnels in Weak Strata
SHI Yu-feng1, LIN Hui2, YANG Jun-sheng2, XU Chang-jie1
1. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang Jiangxi 330013, China;
2. School of Civil Engineering, Central South University, Changsha Hunan 410075, China
摘要Safety coefficient and surface settlement were chosen as evaluation indictors for non-self-stabilizing weak strata and basic self-stabilizing weak strata. Fluid mechanical interaction is used to analyze the pre-reinforcement scope and strength parameters in this numerical method. Moreover, the scope of lateral reinforcement is discussed based on the damage modes of tunnels in stratums with different depths. The study shows the following: (1) The thickness and stiffness of reinforced regions must meet certain conditions simultaneously to obtain a better surface settlement; (2) The thickness of reinforced region must be approximately 2-2.5 m and the stiffness of reinforced region should be increased until it is six times that of the original stratum to guarantee stable stratum stability in non-self-stabilizing stratums; (3) The thickness should be 1.5-2 m for basic stability strata, and the stiffness should be increased until it is five times th at of the original stratum. Finally, the scope of consolidation given the damage mechanism of formation is verified through numerical calculation.
Abstract：Safety coefficient and surface settlement were chosen as evaluation indictors for non-self-stabilizing weak strata and basic self-stabilizing weak strata. Fluid mechanical interaction is used to analyze the pre-reinforcement scope and strength parameters in this numerical method. Moreover, the scope of lateral reinforcement is discussed based on the damage modes of tunnels in stratums with different depths. The study shows the following: (1) The thickness and stiffness of reinforced regions must meet certain conditions simultaneously to obtain a better surface settlement; (2) The thickness of reinforced region must be approximately 2-2.5 m and the stiffness of reinforced region should be increased until it is six times that of the original stratum to guarantee stable stratum stability in non-self-stabilizing stratums; (3) The thickness should be 1.5-2 m for basic stability strata, and the stiffness should be increased until it is five times th at of the original stratum. Finally, the scope of consolidation given the damage mechanism of formation is verified through numerical calculation.
基金资助:Supported by the Project of Science and Technology Demonstration Engineering of Ministry of Transport of China (No.CXKJSF0106-1);the National Natural Science Foundation of China (NO.51338009)
通讯作者:
SHI Yu-feng, s074811156@126.com
E-mail: s074811156@126.com
引用本文:
石钰锋, 林辉, 阳军生, 徐长节. 软弱地层浅埋隧道加固范围及强度参数的研究[J]. Journal of Highway and Transportation Research and Development, 2014, 8(4): 76-81.
SHI Yu-feng, LIN Hui, YANG Jun-sheng, XU Chang-jie. Research on Pre-reinforced Regions and Strength Parameters of Shallow Tunnels in Weak Strata. Journal of Highway and Transportation Research and Development, 2014, 8(4): 76-81.
[1] HU xin, YANG Jun-sheng, ZHONG Fang-ping, et al. Ground Pre-reinforcement of Shallow Large Span Tunnel in Valley Region Area Using Bamboo Tube Grouting[J]. Highway Engineering, 2012, 37(1):32-36. (in Chinese)
[2] SHI Yu-feng,YANG Jun-sheng,YANG Feng, et al. Study of Stability of Surrounding Rock due to Approaching of Two Excavation Faces and Face Reinforcement in a Large Cross-section Tunnel in Weak Stratum[J]. Journal of Highway and Transportation Research and Development, 2013, 30(5):82-88. (in Chinese)
[3] GOU De-ming,YANG Jun-sheng,ZHANG Ge,et al. Deformation Monitoring and Mechanical Behaviors of Pipe-roof in Shallow Tunnels[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(6):1258-1264. (in Chinese)
[4] MUSSO G. Jacked Pipe Provides Roof for Underground Construction in Busy Urban Area[J]. Civil Engineering, ASCE, 1979, 11(49):79-82.
[5] SHI Yu-feng, YANG Jun-sheng, SHAO Hua-ping, et al. Risk Analysis and Control Study of Super-shallow Tunnel with Large Cross-section under Water-rich Channel[J]. Rock and Soil Mechanics, 2012, 33(S2):229-234. (in Chinese)
[6] JIANG Hong-sheng, HOU Xue-yuan. Study of the Loading Pattern on Circular Tunnel in Soft Ground[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(4):651-658. (in Chinese)
[7] JI Xiao-ming. Face Stability Analysis and Disturbed Behavior of Shallow Bored Tunnel in Soils[J]. Journal of Railway Science and Engineering, 2007, 4(4):56-60. (in Chinese)
[8] LIU Zhi-chun, LI Wen-jiang, ZHU Yong-quan. Forecast and Analysis of Surface Subsidence of Metro Tunnel Construction in Mucky Ground[J]. Rock and Soil Mechanics, 2005, 26(10):1681-1684. (in Chinese)
[9] KUANG Yong, ZHU Yong-quan, JIA Xiao-yun. Study of Construction Technique Scheme of Shallow Embedded Tunnel of Shanghai Subway #2 Line in Silty Stratum[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(S1):2946-2951. (in Chinese)
[10] YANG Feng. Investigation of Shallow Tunnel Stability Using Upper Bound Solution of Limit Analysis[D]. Changsha:Central South University, 2009. (in Chinese)
[11] ZHANG Li-ming, ZHENG Ying-ren, WANG Zai-quan, et al. Application of Strength Reduction Finite Element Method to Road Tunnels[J]. Rock and Soil Mechanics, 2007, 28(1):97-102. (in Chinese)
[12] YIN Ying, WANG Zai-quan, WANG Jian-xin. Application of Strength Reduction Finite Element Method in Stability Analysis of Subsea Tunnel[J]. Journal of Yantai University:Natural Science and Engineering Edition, 2007, 27(3):210-214. (in Chinese)
[13] AN Yong-lin, HUANG Kan, PENG Li-min, et al. Analysis of Tunnel Stability Based on Strength Reduction Method[J], Journal of Highway and Transportation Research and Development, 2011, 28(4):91-95. (in Chinese)
[14] LIU Cheng-yu. Soil Mechanics[M]. Beijing:China Railway Publishing House, 2006. (in Chinese)
[15] Itasca Consulting Group. FLAC3D Fluid-mechanical Interaction[R]. Ver.2.1.[S. l.]:Itasca Consulting Group, 2003.
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2014, Vol. 8 
