Stability Analysis And Prevention Measures Of Landslide In Yueya Substation, Yiliang County, Yunnan Province

Yueya Substation landslide is located on the slope of the northwest side of the Yueya Substation in YiLiang county,yunnan province.Since the hill-creep began in 2011,the right side of the landslide,the leading edge and the trailing edge of the landslide occurred several secondary slip.It has been in an active state of deformation.By June 2016,the slope area has formed a clear and integrated landslide.Once the landslide is destabilized,it will directly threaten the 45 million Yuan Yueya substation.It also threatens LeLisheng biotechnology limited company about 6 million yuan in fixed assets and about 15 employees and pedestrians in and out of the park.Therefore,it is great significance to reaserch the stability of the landslide.Through the detailed analysis of the natural condition and geological environment condition of the landslide in the Yueya substation,the basic morphological characteristics,formation mechanism and influencing factors of the landslide are studied systematically.Using the extreme balance method and the numerical simulation to calculate the stability of the Yueya transformer substation.According to the stability analysis results,using the best way to study landslide prevention and control measures.Finally,using the ANSYS software to analyze the effect of the control measures.The main research contents and results are as follows:(1)Through the collection of regional data and field investigation,the natural and geological conditions of the study area are elaborated in detail.Based on this,reaserch the deformation characteristics and genetic mechanism of the landslide,and the process of landslide evolution is analyzed comprehensively.(2)The method of limit equilibrium(transfer coefficient)is used to analyze the stability of the landslide in the three conditions of natural,rainstorm and earthquake,the results were 0.96,0.80 and 0.79.Using ANSYS and GeoStuido software to numerical simulate the landslide,the paper studied the stress,strain and displacement cloud map in three different working conditions.The stability coefficient is 1.001,0.811 and 0.808 respectively,and the displacement quantity is 2.409 mm and the full water is 7.033 mm and further verified the formation mechanism of the landslide.(3)According to the research,designed two sets of prevention and control of engineering project,and compares the two rows of anti-slide pile plus anchor cable sash girder,finally with the help of ANSYS numerical simulation software,the effect of prevention and control engineering are analyzed,and results show that the saturated the maximal displacement of 0.716 mm,the largest displacement in the slope is 0.222 mm,to verify the effectiveness of the control scheme is feasible.