某水库边坡开挖及逐级支护的稳定性分析  

Stability Analysis of Slope Excavation and Step-by-step Support of a Reservoir

作　　者：向鹏鹏 XIANG Pengpeng(School of Mechanical and Electrical Engineering,Xinjiang Institute of Technology)

机构地区：[1]新疆理工学院机电工程学院,新疆维吾尔自治区阿克苏市843000

出　　处：《现代矿业》2025年第1期165-169,共5页Modern Mining

摘　　要：以西部某水库导流泄洪隧洞出口边坡为研究背景,根据边坡的工程地质条件,利用ANSYS建立岩土边坡模型,采用FLAC3D模拟分析边坡在天然状况的稳定性。研究结果表明,天然工况边坡安全系数为1.19,不满足规范下限要求;边坡开挖后稳定性进一步降低,临空面因卸荷回弹,在X方向上位移较明显。塑性区和剪应变分布表明,坡脚和坡面的局部区域会发生剪切破坏,需进行必要支护。逐级开挖支护方案模拟结果表明,边坡支护后,X方向上的位移值显著减小,锚杆锚索支护的效果较好,安全系数均满足要求,研究成果可为同类型工程中边坡的稳定性分析及支护方案提供参考。Taking the outlet slope of the diversion tunnel of a reservoir in the west as the research background,according to the engineering geological conditions of the slope,the geotechnical slope model is established by ANSYS,and the stability of the slope in natural condition is simulated by FLAC3D.The results show that the safety factor of slope under natural conditions is 1.19,which does not meet the lower limit of the specification.The stability of the slope is further reduced after excavation,and the displacement of the free surface is obvious in the X direction due to the unloading rebound.The distribution of plastic zone and shear strain indicates that shear failure will occur at slope foot and local area of slope surface,and necessary support should be carried out.The simulation results of step-by-step excavation and support scheme show that the displacement value in X direction decreases significantly after slope support,the effect of bolt and cable support is better,and the safety factors meet the requirements.The research results can provide reference for the stability analysis and support scheme of slope in the same type of engineering.

关 键 词：岩石边坡 稳定性分析 逐级支护 数值模拟 

分 类 号：TD3[矿业工程—矿井建设]