摘要
分析边坡稳定性对保护人民财产生命安全至关重要。为探究某高陡边坡在天然、暴雨、地震3种工况下的稳定性,采用工程地质调查方法得到7个典型边坡剖面地质概化模型,通过对已发生滑坡的边坡剖面进行参数反演得到岩土体在天然状态和饱和状态下的力学参数,采用刚体极限平衡法与强度折减法分析了7个边坡剖面的在天然、暴雨、地震3种工况下的稳定性。计算结果表明:相比于极限平衡法,强度折减法得到的安全系数相对较低,计算结果偏安全;K-K′剖面在在天然工况下处于基本稳定状态,暴雨工况下处于欠稳定或是基本稳定状态,地震工况下处于不稳定或欠稳定状态,亟需采取防护措施,其余剖面在各工况下均处于稳定状态。
Analyzing slope stability is critical to protecting people's property and lives.In order to investigate the stability of a high-steep slope under natural,heavy rainfall and seismic conditions,the geological generalization model of seven typical slope profiles was obtained by using engineering geological investigation methods,and the mechanical parameters of geotechnical bodies in the natural and saturated states were obtained by parameter inversion of the slope profiles where landslides had occurred,and the stability of seven slope profiles under natural,heavy rainfall and seismic conditions was analyzed by using the method of rigid-body limit equilibrium and the method of strength discounting.The stability of seven slope profiles was analyzed under natural,heavy rainfall and earthquake conditions using rigid body limit equilibrium and strength reduction methods.The calculation results show that:compared with the limit equilibrium method,the coefficient of safety obtained by the strength reduction method is relatively low,and the calculation results are on the safe side;the K-K′profile is in a basically stable state under the natural condition,unstable or basically stable under the rainstorm condition,and unstable or unstable under the seismic condition,which requires protection measures,and the rest of the profiles are in a stable state under the various conditions.
作者
许龙
李文俊
孙翰卿
周明文
XU Long;LI Wenjun;SUN Hanqing;ZHOU Mingwen(Nonferrous Mine Geological Disaster Prevention Center of Guangdong Province Guangzhou 510080,China;School of Civil Engineering and Transportation,South China University of Technology Guangzhou 510640,China;Guangzhou Municipal Construction Co.,Ltd.Guangzhou 510030,China;Guangzhou Construction Group Co.,Ltd.Guangzhou 510030,China)
出处
《广东土木与建筑》
2024年第4期32-36,50,共6页
Guangdong Architecture Civil Engineering
基金
住房和城乡建设部科学技术计划项目(2022-K-039)
广东省住房和城乡建设厅科技计划项目(2020-K5-144658)
广州市建筑集团有限公司科技计划项目([2023]-KJ016)。
关键词
极限平衡法
强度折减法
数值分析
FLAC3D
limit equilibrium method
strength discounting method
numerical analysis
FLAC 3D
