摘要
为了对滑坡堆积体的变形机制进行研究,更有效地开展滑坡治理工作,以贵州剑河县东岭信滑坡堆积体为例,根据现场地质勘查、室内试验和排水隧洞施工揭露情况,探明了东岭信滑坡堆积体的地质条件;基于丰富的监测数据,综合分析了地表位移、地表裂缝、洞内裂缝和深部位移,探讨了滑坡堆积体的变形特征;采用数值方法,分析和评价了堆积体的边坡稳定性.研究结果表明:水库初期蓄水开启了东岭信滑坡堆积体的变形失稳进程,边坡进入蠕滑变形阶段;河水位上升与持续强降雨导致边坡地下水位抬升,激发边坡变形曲线呈阶跃式发展;边坡安全系数在汛前枯水期达到最高(1.14),在汛期末处于最低值(1.01).治理工作重点在于做好边坡的截排水措施,降低地下水位.
In order to study the deformation mechanism of landslide accumulation and treat it more effectively,taking Donglingxin landslide accumulation in Jianhe county,Guizhou as an example,the geological conditions of Donglingxin landslide accumulation were investigated based on the detailed geological exploration,indoor test and drainage tunnel construction,the surface displacement,surface fracture,in-hole fracture,and deep displacement were comprehensively analyzed,and the deformation characteristics of landslide accumulation were discussed.Finally,the stability of the slope was evaluated by numerical method.The results show that the initial storage of the reservoir starts the deformation and instability process of Donglingxin landslide accumulation,and then,the slope enters into the creep deformation stage.The rise of river water level and continuous heavy rainfall lead to the rise of the groundwater level of the slope,which results in a step development of the slope deformation curve.The slope safety factor reaches the highest value(1.14)in the pre-flood dry season and the lowest value(1.01)at the end of the flood season.Main attention should be paid to lower the slope groundwater table by drainage measures.
作者
唐军峰
唐雪梅
周基
钟辉亚
谢尚智
Tang Junfeng;Tang Xuemei;Zhou Ji;Zhong Huiya;Xie Shangzhi(School of Civil and Environmental Engineering,Hunan University of Science and Engineering,Yongzhou 425199,Hunan,China;PowerChina Zhongnan Engineering Corporation Limited,Changsha410014,China;Hunan Hua’an Foundation Engineering Corporation Limited,Changsha410000,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2022年第2期503-516,共14页
Journal of Jilin University：Earth Science Edition
基金
湖南省自然科学基金项目(2020JJ4326)
中国电建集团中南勘测设计研究院自主创新项目(YFHT 1856)。
关键词
滑坡堆积体
地下水位
变形机制
滑坡稳定性
landslide accumulation
underground water table
deformation mechanism
stability of the slope
