溜砂坡开挖的稳定性分析
Stability Analysis of Sand-sliding Slope Excavation
叶唐进 1张宇 2何佳林 1周小朋 1杨雨蒿1
作者信息
- 1. 四川建筑职业技术学院 四川成都 610399
- 2. 西藏大学工学院 西藏拉萨 850000
- 折叠
摘要
为探明不同含水率对溜砂坡开挖稳定性的影响,文章通过对溜砂坡碎屑物进行工程地质参数测试,运用FLAC 3D对不同含水率条件下的溜砂坡进行稳定性分析,并通过物理模型试验验证其开挖的稳定性.研究表明:(1)通过室内测试得到,随着溜砂坡含水率的增加,其碎屑物粘聚力呈现先增大后减小的趋势,内摩擦角则呈现出降低的趋势;(2)通过数值模拟可知随着含水率的逐渐增加,边坡开挖面应力、位移和安全系数均呈现出先增加后减小的趋势,当边坡含水率为11%时稳定性最高;(3)通过物理模型试验所得到的边坡稳定性特征与数值模拟一致,验证了数值模拟的准确性.研究结果可为类似溜砂坡的开挖研究提供参考.
Abstract
To investigate the influence of different water content on the stability of sand-sliding slopes under ex-cavation,in this paper,FLAC 3D is used to analyze the stability of sand-sliding slopes under different water con-tent conditions,and the excavation stability is verified using physical models.The results show that the cohesive-ness of debris on sand-sliding slopes increases first and then decreases with the increase of water content,and the internal friction angle decreases.It also shows that with the increase of water content,the stress of the slope excavation face,displacement,and safety factor increase first and then decrease,and the stability is the highest when the water content of the slope is 11%.Moreover,the stability characteristics of the slope obtained by the physical model testing are consistent with the numerical simulation,which verifies the accuracy of the numerical simulation.The results of this studies can provide a reference for excavation study of similar sand-sliding slopes.
关键词
溜砂坡/含水率/开挖/稳定性/FLAC/3DKey words
sand-sliding slope/water content/excavation/stability/FLAC 3D引用本文复制引用
基金项目
德阳市社会发展领域重点研发指导类项目(2023SZZ136)
灾害前沿研究团队资助项目(DP20220294)
西藏大学研究生高水平人才培养计划项目(2021-GSP-S146)
出版年
2024
NETL
NSTL
万方数据