穿越古滑坡川主寺隧道围岩破坏特征及稳定性研究
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摘要
文章以川主寺隧道所处的工程地质条件为基础,通过现场调研分析了隧道围岩变形破坏形式主要为坍塌、掉块以及剥落。围岩稳定性三维有限元数值模拟结果显示,碎裂围岩自稳能力差,围岩变形以弹塑性变形、松弛变形为主;H型钢拱架支护结构对碎裂围岩稳定性起到积极的作用,并通过典型洞段现场位移监测数据分析结果得以证实。
Based on the geological conditions of the Chuanzhusi Tunnel,which passes through an ancient landslide,a site investigation found that the surrounding rock deformation and failure modes of the tunnel are mainly tunnel collapse,spalling and dropping.The three-dimensional finite element numerical simulation of the stability of surrounding rock by FLAC3D showed that the self-stability of the fractured rock mass is poor and the deformation modes are mainly of the elastic-plastic and relaxation varieties.Support with an H-beam steel framework played a positive role regarding the stability of fractured surrounding rock.
Based on the geological conditions of the Chuanzhusi Tunnel,which passes through an ancient landslide,a site investigation found that the surrounding rock deformation and failure modes of the tunnel are mainly tunnel collapse,spalling and dropping.The three-dimensional finite element numerical simulation of the stability of surrounding rock by FLAC3D showed that the self-stability of the fractured rock mass is poor and the deformation modes are mainly of the elastic-plastic and relaxation varieties.Support with an H-beam steel framework played a positive role regarding the stability of fractured surrounding rock.
引文
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[7]许增会,宋宏伟,赵坚.地震对隧道围岩稳定性影响的数值模似分析[J].中国矿业大学学报,2004,33(1):41~44 Xu Zenghui,Song Hongwei,Zhao Jian.Numerical Analysis of Stability of Tunnel Surrounding Rocks under Earthquake[J].Journal of China University of Mining&Technology,2004,33(1):41-44
[2]闫春岭,丁德馨,崔振东,等.FLAC在铁山坪隧道围岩稳定性分析中的应用[J].地下空间与工程学报,2003,2(3):499-503 Yan Chunling,Ding Dexing,Cui Zhendong,et al.Application of FLAC in the Stability Analysis of Tieshanping Tunnel Surround-ing Rock[J].Chinese Journal of Underground Space and Engineering,2003,2(3):499-503
[3]伍毅敏,王飞,邹正明,等.半明半暗隧道洞口段力学特征分析与现场监测[J].岩石力学与工程学报,2008,(sup1):2873-2882 Wu Yimin,Wang Fei,Zou Zhengming,et al.Mechanical Character Analysis and In-situ Monitoring for Portal Section of Half-buried Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2008,(supl):2873-2882
[4]曾杰,靳晓光,高永,等.公路隧道围岩动态分级方法研究[J].重庆建筑大学学报,2007,29(6):76-79 Zeng Jie,Jin Xiaoguang,Gao Yong,et al.Dynamic Classification of the Highway Tunnel Surrounding Rock[J].Journal of Chongqing Jianzhu University,2007,29(6):76-79
[5]廖彬,周洪福,聂德新.国道213线龙眼睛隧道围岩大变形三维数值模拟研究[J].地质灾害与环境保护,2007,18(1):20-23 Liao Bin,Zhou Hongfu,Nie Dexin.Three-dimensional Numerical Analysis of Great Wall Rock Distortion of the Longyanjing Tun-nel in G213[J].Journal of Geological Hazards and Environment Preservation,2007,18(1):20-23
[6]李泽泽,沈军辉,顾涛,等.龙溪隧道出口段在地震荷载下变形破裂特征及其数值模拟分析[J].现代隧道技术,2009,46(5):40-45Li Zeze,Shen Junhui,Gu Tao,et al.Deformation-fracture Characteristics and Numerical Simulation Analysis of Longxi Tunnel Outlet Section under Earthquake[J].Modern Tunnelling Technology,2009,46(5):40-45
[7]许增会,宋宏伟,赵坚.地震对隧道围岩稳定性影响的数值模似分析[J].中国矿业大学学报,2004,33(1):41~44 Xu Zenghui,Song Hongwei,Zhao Jian.Numerical Analysis of Stability of Tunnel Surrounding Rocks under Earthquake[J].Journal of China University of Mining&Technology,2004,33(1):41-44
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