高海拔寒区沼泽土地层隧道边仰坡锚杆加固效果分析  

Analysis of Anchor Bolt Reinforcement Effect on Tunnel Scope of Slope in Marsh Soil Layer in High Altitude Cold Region

作　　者：贺正伟 胡焕猛 杨浩楠 HE Zhengwei;HU Huanmeng;YANG Haonan(CCCC-SHEC Fourth Highway Engineering Co.Ltd,Luoyang 471000,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]中交二公局第四工程有限公司,河南洛阳471000 [2]河南理工大学土木工程学院,河南焦作454003

出　　处：《洛阳理工学院学报（自然科学版）》2023年第1期34-38,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：通过有限元数值模拟软件对比分析了边仰坡加固前后隧道进洞时边仰坡的稳定性,对仰坡位移、塑性区分布、仰坡安全系数和锚杆轴力分布进行了分析。边仰坡在进行加固后位移及塑性区范围减小,隧道进洞施工对其稳定性影响减小;隧道进洞50 m时仰坡加固前后安全系数分别为1.3和1.55,安全系数有较大提升;根据锚杆轴力随其长度分布规律得出边仰坡在隧道施工扰动下是沿浅层滑动面的破坏。Based on the finite element numerical simulation software,the side slope stability before and after reinforcement at the tunnel entrance is comparatively analysed,including the back slope displacement,plastic zone distribution,back slope safety factor and the bolt axial force distribution.The results show that the scope of the slope after displacement reinforcement and plastic zone size is reduced and less effect on the stability of the tunnel entrance construction.At 50 m into the tunnel,the safety factors before and after the slope reinforcement are 1.3 and 1.55 respectively,greatly improved;according to the distribution law of bolt axial force with its length,the side slope is destroyed along the shallow sliding surface under the disturbance of tunnel construction.

关 键 词：高海拔寒区 沼泽土地层 边仰坡支护 锚杆轴力 

分 类 号：U25[交通运输工程—道路与铁道工程]