Stability Analysis of Mud Interlayer Deformation Body of Xinjiang Fukang Pumped Storage Power Station
The muddy interlayers at the bottom of the deformation body of the upper reservoir of Fukang Pumped Storage Power Station in Xinjiang are relatively developed,which seriously threatens the stable operation of the project.Based on the finite element analysis of the deformation body and the monitoring data of surface displacement and inclined hole displacement,the instability failure characteristics of the deformation body and the temporal and spatial variation law of displacement are studied.The results show that the deformation body is in a stable state under natural conditions.Under the action of the pressure slope,the overall safety factor of the slope increases from 1.33 to 1.51,and the safety factor increases by 13.5%compared with the natural state.The stability of the deformed body is obviously im-proved after the pressure slope treatment,but the strength parameters of the mud interlayer have a great influence on the stability of the deformed body.The strength parameters of the mud interlayer are reduced by 40%,and the overall safety factor of the deformed body is less than 1.0.The maximum cumulative horizontal displacement of each surface deformation measuring point of the deformable body is 8.56 mm,and the maximum cumulative vertical displacement is 10.03 mm.The maximum average displacement of the upstream and downstream of the measuring hole and the left and right banks does not exceed 0.6 mm.The deformation of the deformed body is mainly manifested as creep deformation along the mud interlayer.Systematic deformation monitoring should be carried out on different parts of the deformed body during construction,reservoir impoundment and operation.
slope stability analysisdeformation monitoringfailure modefinite element analysisFukang Pumped Storage Power Station
国家科技期刊平台
NSTL
万方数据
维普
