摘要
以四川绵阳九岭岗隧道为背景,基于非饱和土流固耦合理论,采用MIDAS GTS NX有限元软件研究了降雨入渗对隧道边坡塑性区、整体位移及安全系数的影响,并根据数值分析结果探讨了不同支护措施的加固效果。结果表明,在降雨入渗条件下,左线隧道边坡及右线洞口浅层土体极易发生塑性破坏;随着降雨时长增加,边坡土体抗剪强度降低,整体位移明显增大,安全系数不断减小;对比分析锚索与抗滑桩对边坡位移的控制效果,最终选用锚索加固隧道边坡。
This research takes the Jiulinggang Tunnel Project in Mianyang,Sichuan Province as the background.Based on the theory of unsaturated soil fluid-solid coupling,the influence of rainfall infiltration on the plastic zone,overall displacement and safety factor of the tunnel slope was analyzed using MIDAS GTS NX finite element software.According to the numerical analysis results,the reinforcement effect of different support measures was discussed.The results show that under the condition of rainfall infiltration,the slope of the left tunnel and the shallow soil at the entrance of the right tunnel are prone to plastic failure.With the increase of rainfall duration,the shear strength of slope soil decreases,the overall displacement increases obviously,and the safety factor decreases continuously.The anchor cable was selected to reinforce the tunnel slope after comparing the control effect of the anchor cable and the anti-slide pile on the slope sliding.
作者
王凯
李文杰
唐坤
梁斌
WANG Kai;LI Wen-jie;TANG Kun;LIANG Bin(School of Civil Engineering,Henan University of Science and Technology,Luoyang 471023,China;The Third Construction Co.,Ltd.of China Railway Construction 15th Corporation,Chengdu 611730,China)
出处
《水电能源科学》
北大核心
2022年第4期121-124,共4页
Water Resources and Power
基金
国家自然科学基金项目(11402077)
中铁十五局集团科技研发项目(2020C16)
河南省科技厅产学研合作项目(2015HNCXY011)。
关键词
降雨入渗
浅埋偏压隧道
边坡稳定性
流固耦合
强度折减法
rainfall infiltration
shallow-buried bias tunnel
slope stability
fluid-solid coupling
strength reduction method
