摘要
基于斜坡变形破坏的时空演化规律,对西南某水电站坝前右岸边坡的稳定性进行研究,并结合边坡变形监测数据,对边坡变形与库水位升降之间的关系进行了分析。结果表明:滑坡周边裂缝还未形成,裂缝体系尚未圈闭,根据斜坡变形破坏的空间演化规律判断,边坡目前处于基本稳定状态,不存在发生滑坡的危险;随着库水位的基本稳定,边坡变形量逐渐趋于稳定增长,无进入加速变形阶段迹象,根据斜坡变形破坏的时间演化规律判断,目前边坡不存在发生滑坡的危险;水位升降过程中边坡内部分别会形成指向坡内和坡外的渗流场,其将极大地影响边坡的稳定性;因边坡变形受水库蓄放水影响明显,建议加强水库蓄放水过程中地表裂缝巡视及监测数据的分析。
The stability of right bank side slope in front of the dam of a hydropower station in southwest China was studied based on space-time evolution laws of slope deformation and failure.Besides,the relationship between slope deformation and the rise and fall of water level was studied by integrating slope deformation monitoring data.The results show that：①Fissures surrounding the landslide have not been formed yet and fracture systems have not been closed,judging from the space evolution laws of side slope deformation and failure;the side slope is in a basically stable state currently,without the danger of landslides,②With the basic stability of reservoir water level,deformation of the side slope is gradually inclined to a steady increase without the sign of accelerating deformation,and there is no risk of landslides on the side slope currently,judging from the time evolution laws of side slope deformation and failure,③ Seepage fields pointing outside and inner the slope will be formed respectively in the slope in the process of water level rise and fall,which will greatly affect the stability of the slope,④ As the deformation of the side slope is obviously influenced by reservoir impoundment and drainage,it is advisable to reinforce inspection of ground surface fissures and analysis of monitoring data in the process of impoundment and drainage.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2017年第3期71-78,共8页
Journal of Chongqing Jiaotong University(Natural Science)
关键词
水电工程
时空演化规律
水位升降
水库边坡
变形速率
稳定性
hydrelectric engineering
space-time evolution laws
rise and fall of water level
reservoir slope
deformation rate
stability
