摘要
降雨入渗对多级锚杆支护边坡稳定性的影响尚不清晰,基于非饱和土渗流-应力耦合理论,采用Geo-studio软件建立了降雨入渗锚杆加固多级边坡的流固耦合有限元分析模型,研究不同降雨持时、雨强时锚杆加固多级边坡的渗流、应力、位移场、稳定性变化规律,以及锚杆受力特性。结果表明:随着雨强和持时的增大,锚杆轴力及坡面位移均增大,边坡安全系数降低;第三级边坡的锚杆轴力提升幅度最大;同一级边坡内,坡脚处的锚杆轴力值大于坡顶处锚杆力。
The variation law of the influence of rainfall infiltration on the stability of multi-stage anchor supported slope is unclear.Based on the seepage stress coupling theory of unsaturated soil,the seepage and stress coupling calculation of the slope reinforced by anchor were carried out by using Geo-studio finite element software.The variation laws of seepage,stress,displacement field and stability of multi-stage slope strengthened with anchor under different rainfall duration and rainfall intensity,as well as the stress characteristics of anchor were analyzed.The results show that with the increase of rain intensity and duration,the average displacement and slope axial force of anchor increase,and the safety factor of the slope is lower.The axial force of the anchor rod of the third grade slope increases the most.In the same grade of slope,the axial force of anchor at the bottom of slope is greater than that at the top of slope.
作者
周粲铭
董旭光
李峥
马子涵
ZHOU Can-ming;DONG Xu-guang;LI Zheng;MA Zi-han(School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China)
出处
《科学技术与工程》
北大核心
2022年第28期12550-12556,共7页
Science Technology and Engineering
基金
国家自然科学基金(51968061)
宁夏回族自治区重点研发计划(2021BEG03023)
宁夏大学贺兰山学者青年项目(2017067)。
关键词
边坡稳定性
降雨入渗
锚杆
非饱和土渗流
有限元分析
slope stability
rainfall infiltration
anchor
unsaturated soil seepage
finite element analysis
