| The terrain of the valley plain on the leading edge of the Xishan III landslide is relatively flat and open.There are mainly public service facilities on the terrace,such as residential buildings,highways and municipal pipe networks.Human engineering activities are very powerful.It laid a hidden danger for the occurrence of landslide disasters,especially in Siheji Village and Siheji Temple.The excavation of soil was carried out.The position of the slope foot formed a number of steep slopes,resulting in changes in the stress state of the slope and reducing the sliding power of the slope foot.In addition,the local forestry department faces the slope body.Afforestation,afforestation,irrigation,etc..The severe local environment has undergone varying degrees of change and destruction,which has had a very negative impact on the stability of landslides.In addition,due to excavation and planting,many platforms with a width of approximately1.0-1.5 meters and a height of approximately 0.5-3.0 meters are formed on the slope.Although this reduces the intensity of slope runoff erosion,it extends the infiltration time,increases the permeability,and increases the possibility of landslide instability.This paper combines the investigation report of Xishan III landslide and the design of construction drawings,"Geological Survey-Cause Analysis-Quantitative Evaluation",and combines relevant data and required knowledge.The stability of the landslide under special Geological environment conditions(slope of mountain filling)is fully analyzed.On this basis,according to the terrain and geological conditions of the site,the suitable treatment scheme for the landslide is selected and designed.The following are known:The first phase of the slide is mainly the rise of the terrain in the area.Later,it was cut by the Longwu River erosion and gully erosion,forming a steep slope.Coupled with theinfluence of precipitation and earthquakes,a large-scale landslide group was formed in the Xishan area.The first phase of landslide III was formed by the overall slip after the overall down fault.The main influencing factor of the second phase sliding is the further erosion and cutting of the Longwu River.The Longwu River branch ditch was formed in the landslide area of Xishan III.The branch ditch cuts and decomposes the deposit of the first phase of the landslide,causing local instability of the deposit of the first phase of the landslide.,coupled with the loose deposit of the landslide,precipitation and other effects,In the first stage,the landslide sediments slide twice.2.Using the transfer coefficient method,the stability of landslide is analyzed according to the shape of the line.3.in order to ensure the overall stability of the slope body,to ensure the effective use of the original design functions of the site,according to the analysis results,The comprehensive prevention and control project of the support project(anti-skid pile +anti-skid retaining wall)+ drainage project + cutting project + pile backfill project +greening project is adopted.4.Simulate and verify the landslide stability after the project is implemented,and compare the results before and after.It can be seen that after the project is implemented,the decline of the landslide will be effectively controlled and the stability will reach the relevant specifications. |
PDF Full Text Request