福建紫金山大垅里某厂区滑坡失稳机理分析及治理  

Analysis and Mitigation of Landslide at a Factory Area in Dalongli,Zijin Mountain in Fujian

作　　者：孟鑫 姚科 赵玉凯 陈锋[2] 李幻[1] MENG Xin;YAO Ke;ZHAO Yukai;CHEN Feng;LI Huan(North China University of Water Resources and Electric Power,Zhengzhou 450046;Institute of Rock and Soil Mechanics,Chinese Academy of Science,Wuhan 430071)

机构地区：[1]华北水利水电大学,郑州450046 [2]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《土工基础》2024年第2期220-224,共5页Soil Engineering and Foundation

摘　　要：福建紫金山大垅里某厂区边坡,在经历多个降雨天气后发生滑坡,边坡原有的坡面支护措施失效,坡顶产生裂缝,边坡处于不稳定状态。为分析该边坡的失稳机理,采取现场土体样品进行三轴和直剪实验,分析降雨对该厂区边坡土体力学参数的影响;根据厂区滑坡破坏情况,选择典型剖面,采用任意条分法,用Geo-slide边坡分析软件对滑坡区进行滑动面安全系数分析。采用削坡、锚索锚杆、抗滑桩等综合治理措施进行加固,并对治理方案进行稳定性验算,结果表明边坡稳定性系数由0.943增加到1.359,超过设计安全系数,边坡状态稳定,可实现预期治理目标。A landslide occurred at the slope of a factory area in Dalongli,Zijin Mountain in Fujian Province after experiencing several heavy rains.The original slope stabilizing measures were ineffective,resulting in cracks at the top of the slope,and the slope was in an unstable state.To analyze the instability mechanism of this slope,on-site undisturbed soil samples were collect-ed and the triaxial as well as the direct shear tests were conducted to analyze the impact of rainfall on the mechanical parameters of the slope soil in the factory area.Based on the damage of the landslide,a typical section is selected,and the arbitrary slice method is used to analyze the factor of safety of the sliding surface by using the Geo-slide slope stability analysis software.The comprehensive mitigation measures such as slope cutting,ground anchor,anti-slide caisson,etc.are utilized for reinforcement.The stability check of the mitigation plan is also performed.The results show that the slope stability factor of safety increases from 0.943 to 1.359,which meets the design requirements.The slope is stable,and the expected mitigation goal can be a-chieved.

关 键 词：边坡稳定性 降雨 任意条分法 边坡治理 

分 类 号：P642[天文地球—工程地质学]