Study On Development Characteristics And Stability Evaluation Of The Landslide Along Fengchang-Zeketai Highway In Xinjiang

The study area is located in Nileke County and Xinyuan County,Xinjiang Uygur Autonomous Region.Restrained by the control and influence of natural and man-made factors,Landslide hazards are widely developed in the study area,which poses a serious threat to the safety of people and property in the study area.Based on the project of"Risk assessment of adverse geological processes along Fengchang-Zeketai highway"and geological survey of Landslide along Fengchang-Zeketai highway,this paper studies the geological environmental background,development types and development characteristics of Landslide disasters in the study area with the combination of collection and analysis of relevant data in the study area.At the same time,this paper analyzes and calculates the stability of the Landslide along Fengchang-Zeketai highway.At last,some engineering measures were put forward.The main conclusions of this paper are as follows:(1)The development characteristics of Landslide disasters in the study area are analyzed.The length of the main axis in Kuludnengsai landslide area is about 160-300 m,the average width is about 100-300 m,the thickness of the sliding body is between 8.0-40.0 m,the volume of the landslide is between 128-1.8 million m~3,the length of the main axis in Aksai landslide area is about 30-50 m,the average width is about 15-25 m,the average thickness of the sliding body is about 3.0-4.0 m,and the sliding body is about 3.0-4.0 m The slope volume is about 1350-5000 m~3;the Kuldnengsai landslides belong to the pushing type of Loess landslides,while the Aksai landslides belong to the small shallow traction type of Loess landslides.(2)The stability of typical landslides in the study area is evaluated and analyzed.The evaluation results show that the 1~# landslide and 2~# landslide of the Kuludnengsai are basically stable under the condition of dead weight,while the 3~# landslide is stable;the 1~# landslide and 2~# landslide are both unstable under the condition of dead weight+rainstorm,while the 3~# landslide is in a basically stable state;the 1~# landslide and 2~# landslide are in unstable state;3~# landslide are in unstable state under the condition of dead weight+earthquake.1~# landslide and 2~# landslide of the Aksai are in stable state under the condition of dead weight;1~# landslide and 2~# landslide are basically stable under the condition of dead weight+rainstorm;the 1~# landslide and 2~# landslide are in unstable state under the condition of dead weight+earthquake.(3)A preliminary proposal for prevention and control of typical landslide hazards in the study area is proposed.For the 1~# and2~# landslides in Kurodesayi,it is suggested to adopt the engineering treatment scheme of route avoidance,drainage and joint filling,and for the 3~# landslide,the engineering treatment scheme of drainage and joint filling should be adopted,and the monitoring and early warning should be strengthened.Back-pressure is applied to the overhead surface of the old road excavation at the bottom of the landslide to prevent further slide caused by slope excavation.