列车震动荷载对边坡稳定性的影响分析
摘要:以某高速铁路隧道出口边坡为研究对象,在边坡工程地质条件、岩体结构特征及变形破坏特征调查分析的基础上,阐明了边坡的变形破坏模式为受卸荷结构面控制的块体顺坡向滑塌破坏。通过建立边坡的三维数值模型,对比分析了边坡在天然工况(施工平台及隧道开挖前)和列车震动荷载工况下,沿隧道走向剖面上的应力、变形及剪应变增量变化特征,并分析了施工平台开挖及列车震动荷载对边坡稳定性的影响,得出了施工平台开挖及列车震动荷载,可能在开挖面附近及坡内软岩夹层中引起局部的变形破坏,对边坡整体稳定性影响较小的结论。
Abstract:Based on the investigation of the engineering geology,rock structure and deformation and failure characteristics of the high-speed railway tunnel exit slope,this paper expounds that the deformation and failure mode of the slope is blocks slip down along unloaded structural planes.By three-dimensional numerical simulation,the stress,deformation and shear strain increment along the tunnel profile in natural conditions(before the platform and the tunnel excavation) and train vibration load conditions is analyzed,and theinfluence of the excavation of the platform and the train vibration load on the slope stability is analyzed.It is concluded that the excavation of the platform and the train vibration load may cause local deformation in the vicinity of the excavation surface and the soft rock interlayer,and they have little effect on the overall stability of the slope.
中文标题:
列车震动荷载对边坡稳定性的影响分析
The Analysis of the Influence of Train Vibration Load on Slope Stability
作者:
李华东,邹超群
Li Huadong,Zou Chaoqun
作者简介:李华东,男,1984年生,汉族,湖北麻城人,硕士,工程师,主要从事岩土工程勘察、设计工作。E-mail:sccdut@163.com
通讯地址:
中航勘察设计研究院有限公司, 北京 100098
AVICInstituteGeotechnicalEngineeringCo.,Ltd,Beijing100098,China
中图分类号:TU441.35
doi:10.3969/j.issn.1007-2993.2018.04.004
出版物:岩土工程技术
收稿日期:2018-03-19
网络出版日期:2021-07-06
关键词:列车震动荷载,边坡,变形破坏模式,稳定性
Key words:train vibration load,slope,deformation and failure mode,stability
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