Stability Analysis And Prevention Of Zhaoshuling Landslide In Badong County

This paper takes the Zhaoshuling landslide in Badong as the research object.Firstly,through the methods of data collection and on-site investigation,the engineering geological characteristics of the Zhaoshuling landslide are studied in detail.Then,with the traditional limit equilibrium method and numerical simulation method,the landslide is respectively The stability and stability of natural and heavy rain conditions are analyzed and evaluated.Then,numerical simulation is taken as the main research method,and the influence of different design parameters of anti-slide piles on the stability of landslide is studied.Supported by different support schemes The horizontal comparison of the effects finally gives a more economical and rational treatment plan.The main conclusions of this paper are as follows:(1)Through detailed investigation and research on the geological conditions of the Zhaoshuling landslide,it is found that the landslide belongs to large-scale bedding rock landslide;under heavy rain conditions,a large amount of surface water can penetrate into the sliding body through the surface crack of the landslide body,resulting in landslide soil correlation.The large drop of physical and mechanical parameters causes the overall instability of the landslide.Therefore,the stability of the landslide under heavy rain conditions needs to be analyzed and evaluated.(2)Based on the two-dimensional numerical analysis software GEO-slope,the stability calculations under natural conditions and heavy rain conditions were calculated for the two typical profiles.It was found that the landslide was stable under natural conditions and was in heavy rain conditions.The lower one is in an unstable state.(3)Since the two-dimensional numerical analysis can only calculate the stability of a single landslide profile,it does not reflect the overall stability of the landslide.Therefore,the FLAC3 D numerical simulation method is adopted to construct the overall shape of the landslide,and then the overall stability of the Zhaoshuling landslide is carried out.The analysis and evaluation,meanwhile,with the help of the numerical simulation,also analyzed the overall displacement of the landslide,the displacement in the main sliding direction,the maximum and minimum principal stress and the deformation state of the plastic zone.(4)In order to explore the sensitive factors of landslide stability,the shear strength parameters cohesive force c and the internal friction angle φ values were selected.By controlling the variables,the landslide stability coefficient was taken as the research object,and the stability of the landslide was sensitive.The analysis shows that for the Zhaoshuling landslide,the influence of the internal friction angle φ on the stability of the landslide is more significant than the cohesion c,so that the stability of the landslide can be judged to be more sensitive to the change of the φ value.(5)Taking numerical simulation as the research method,the effects of design parameters such as pile position,pile section size and pile spacing on the stability of landslide are studied.It is found that: 1 From the position of piles,the anti-slide piles are arranged in the landslide.The middle and lower parts can increase the landslide thrust value of the anti-slide pile,thereby improving the stability of the landslide.2 From the point of view of pile spacing,the smaller the pile spacing,the better the landslide stability,but the engineering cost will increase accordingly.For landslides,the reasonable pile spacing is 4-6 m;3 from the perspective of pile section size,the larger the section size of the pile,the greater the landslide thrust transmitted by the sliding body to the anti-slide pile,and the displacement of the landslide Then it is reduced,the stability of the landslide is higher,but from the economic point of view,the pile section size is not as large as possible.On the basis of satisfying the stability of the landslide,the economical small cross-section size should be adopted as much as possible,and the Zhaoshuling landslide should be adopted.In terms of 1.5m×1.0m and 2.0m×1.5m,it is superior.