Study On Slope Supporting System Of Bamboo Pipe Concrete Anti-slide Pile

Landslide control in western China has always been a research problem faced by researchers.The traditional linear pile row structure has been widely used in loess slope support engineering,but there are still some problems,such as unreasonable stress,waste of resources and soil pollution.Aiming at the limitations of traditional anti-sliding structure,the authors of this article puts forward selecting bamboo tube concrete as the main material of anti-sliding pile body structure,change the structure to decorate,arch and coupling beam at the top of the pile to establish and improve the structure of the stiffness and stability,through the theoretical analysis,model test and numerical calculation to prove the rationality and feasibility of structure,the main research work and achievements are as follows:(1 Load-bearing characteristics of building concrete components and the stress of the arch structure characteristics,combined with the landslide thrust been anti-slide piles under the distribution characteristics of arch effect,bamboo tubes arch concrete pile structure was applied to landslide treatment engineering of loess region,and put forward its under uniformly distributed load is derived reasonable arch axis decorate a form.(2)Model tests of three types of concrete filled steel tube,linear concrete filled steel tube,arch concrete filled bamboo tube and arch concrete filled steel tube are carried out.By observing the test results,it is found that the distribution of earth pressure behind the pile is basically the same under the three working conditions,showing a "triangle"distribution.The tangential displacement of the pile tip in the straight-line arrangement is almost zero,and the normal displacement is 6 times that of the two kinds of piles in the arched arrangement.Three kinds of working conditions of pile bending moment along the pile body is roughly first increases then decreases to reverse a trend of decrease the increase,decorate arch when test pile bending moment when compared with rectilinear layout,reduce near the pile anchorage section bending moment value 177 kN m.respectively and 156 kN m.,explain the arch beam can play a pile top displacement and improve the effect of pile bending moment.(3)By ABAQUS finite element analysis software for numerical calculation of three kinds of anti-sliding retaining structure analysis,it is concluded that under ideal conditions and the characteristics of stressed deformation of beam structure,and the results of numerical calculation and indoor model test,this paper compares and analyzes the results show that the internal force of anti-slide pile,pile body displacement and strain and displacement distribution law of coupling beam cap,Only the distribution trend of bending moment near pile tip has some difference.(4)By analyzing the stress characteristics of arch anti-skid structure when the ratio of arch to span and the anchorage depth of pile body change,the reasonable ratio of arch to span and anchorage depth of pile body are obtained.Combined with the analysis of the effect of anti-skid supporting structure,the economy and applicability of arch bamboo pipe concrete anti-skid structure system applied to landslide control in loess area are obtained.