| In the northwest region of our country,there is a large area of loess resources,which have different characteristics in the generation and construction of loess resources,which show some differences.Generally speaking,the Loess resource itself has poor physical properties of water and anti rain erosion ability is low,this characteristic makes the Loess resources wider distribution area is prone to loess landslide and debris flow disasters,especially when heavy rainfall conditions,geological disasters caused by heavy rain and loess resource interaction is more serious.After the new century,our country clearly and the implementation of the western development strategy,to further promote the development of regional economy,which makes the Weibei area become an important object of economic development,a large number of projects carried out in Weibei area.In a large number of engineering development and construction,the slope as a natural or artificial development of the geological form of universal existence,it has an important role in the engineering project.Under normal circumstances,the natural slope is gradually produced by the change of the nature environment,and the artificial slope is a slope that needs to be constructed by the human to adapt to the construction of the project.Weibei loess area is a typical distribution of resources,mainly in the north wind,the south is a hilly landform,the region of loess slope is usually under relatively complex geological conditions of the landslide,a great chance,this is the landslide disaster in Weibei area is more serious reason.Landslide hazards in the loess slope has many aspects,such as traffic,agriculture,residents,towns and other adverse effects,and even endanger personal safety.In view of this,this thesis focus on the analysis of Weibei loess slope stability and reinforcement optimization research,the research process in accordance with the questions,analyze problems and solve problems.This thesis is the theory research of loess landslide,loess landslide,clear categories of anti sliding technology basic theory and technology of loess slope landslide;after specific analysis,discusses the causes,influence the stability of loess slope,loess landslide physics factors of loess;then on the basis of the survey on Weibei area loess slope terrain and slope,slope stability of the whole region is subdivided into 1 zone and 2 zone and 3 zone,and to start monitoring 3-1 sub region as the main monitoring area,monitoring results show that loess slope level 3-1 sub area changes basically consistent with the following the water front,and the underground water level is relatively low,which makes the slope groundwater effect is not particularly large,the regional deformation speed of loess slope The rate is similar at all point performance,and has obvious zoning in monitoring periods,deformation of the slope surface has two peak,are rising every year the water level, which indicates that the slope deformation associated with precipitation,on the whole,in Weibei loess slope has obvious there are signs of deformation instability.In the monitoring on the basis of the experiment through the physical property test of loess in Weibei loess slope was carried out,and then puts forward some concrete reinforcement optimization scheme,including cleaning brush,toe wall,anchor frame,anti slide pile,slope greening,sinkholes fill,drain settings and other implementation and with the help of the finite element software of MIDAS/GIS before and after the reinforcement of loess slope model and numerical simulation,the numerical simulation results showed that the reinforcement of slope safety factor optimization after the Loess reached 1.54,than the previous 0.97 safety factor optimization of reinforcement to improve significantly,has reached a steady state,indicating that the optimization scheme proposed in this thesis is feasible.This study will be fully in Weibei loess slope reinforcement and stability of loess slope in Weibei area to prevent landslides,reduce soil erosion for the purpose,and put forward the specific techniques of Weibei loess slope reinforcement optimization,to improve soil structure in Weibei Loess Area in our country,strengthen the stability of loess the slope,it is of great realistic significance to protect the ecological environment and reduce the occurrence of Loess landslide. |
