| 超浅埋隧道下穿冲沟边坡塌方分析与处治 |
| |
| 引用本文： | 吴东鹏,杨新安.超浅埋隧道下穿冲沟边坡塌方分析与处治[J].华东交通大学学报,2014(5):24-29. |
| |
| 作者姓名： | 吴东鹏 杨新安 |
| |
| 作者单位： | 同济大学道路与交通工程教育部重点实验室,上海,201804 |
| |
| 基金项目： | 神华包神铁路集团公司科研计划项目 |
| |
| 摘 要： | 某铁路隧道在下穿冲沟边坡时出现冒顶。针对该隧道工程的实际情况,建立数值分析模型,采用FLAC3D程序模拟隧道施工力学行为,考虑暴雨积水对围岩的影响,从围岩塑性区分布、位移以及锚杆和超前大管棚内力分布情况分析隧道变形和冒顶发生的原因。结果表明：隧道超浅埋、持续降水积水、围岩力学性质差及施工支护不当导致坍方。结合工程实际提出洞内加固、冲沟边坡加固及开挖控制的综合处治方法,取得了理想的效果,为日后类似工程提供借鉴与参考。
|
| 关 键 词： | 超浅埋隧道 下穿边坡 塌方冒顶 数值分析 |
Numerical Analysis and Treatment of Collapsed Shallow Tunnel under Gully Side Slope |
| |
| Wu Dongpeng,Yang Xin’an.Numerical Analysis and Treatment of Collapsed Shallow Tunnel under Gully Side Slope[J].Journal of East China Jiaotong University,2014(5):24-29. |
| |
| Authors: | Wu Dongpeng Yang Xin’an |
| |
| Institution: | Wu Dongpeng,Yang Xin＇an (Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University,Shanghai 201804,China) |
| |
| Abstract: | During undercrossing of gully side slope for a tunnel,collapse accident occurred.According to the fieldgeological and construction conditions,this study sets up the numerical model,taking the influence of rainstormand hydrops into account.The commercial software FLAC^3D is adopted to simulate the behaviors of the tunnel andsurrounding rock.Based on the results of deformations in rock and the inner forces within rock bolts and beam,thedeformation of the tunnel and the causes of tunnel collapse are analyzed.The results show that：shallow tunnel,continuous rainfall,poor mechanical properties of rock and construction support landslides result in collapse.Thecomprehensive remedy measures consisting of reinforcement inside,slope surface grouting reinforcement and exca-vation control are proposed,which have achieved satisfactory results so as to offer reference for the future similarprojects. |
| |
| Keywords: | shallow-buried tunnel undercrossing gully side slope collapse numerical simulation |
| 本文献已被 维普 等数据库收录！ |
|
