Study On Bearing Characteristic Of Different Sections Of Anti-slide Piles

Anti-slide pile structure is widely used in landslide,slope reinforcement and foundation pit supporting project.However,domestic and foreign scholars for the study on the properties of anti-slide pile bearing are deficiency at present and the design of anti-slide pile is lack of the general theoretical basis.The study which focuses on anti-slide pile bearing characters of different slip cross section design has a great influence in section of anti-slide pile.So it is difficult to achieve both security and economic purpose of the design scheme of anti-slide pile retaining structure.Too conservative anti-slip section design will lead to excessive investment waste.On the contrary,it will cause the hidden danger of engineering safety.To this end,the study of the bearing characters of different cross-section anti-slip piles and the optimal design of anti-slip pile section is one of the important issues to be solved in the design of the current anti-slide pile support structure.On the basis of the principle of the soil arch effect,circular and rectangular cross section which is commonly used in engineering pile and a t-shaped cross-section optimization design of anti-slide pile load-bearing characteristics were studied.Simulated the actual working status of anti-slide pile in slope engineering through the indoor anti-slide pile model test and numerical analysis software FLAC3 D and researched different slip bearing character.The main work and conclusions are as follows:(1)Based on the literature review,the formation mechanism of soil arching effect and the classification of soil arching are briefly reviewed.Based on the analysis of previous studies on the effect of soil arching on the pile,the bearing behavior of different sections of anti-slide pile is studied.(2)The internal model of the anti-slide pile is designed,and the stress distribution of the post-pile soils with different cross-section anti-slide piles is studied.The stress distribution and the displacement of the pile are also studied.The effects of anti-slide piles on the soil arching effect of piles are pointed out.Under the premise of the same pile distance and the cross-sectional area of anti-slide pile,the displacement of pile top: T-shaped pile <square pile <round pile,Slip effect: round pile <square pile <T-shaped pile,pile around the soil arch effect of the degree of development: round pile <square pile <T-shaped pile.(3)The FLAC3 D numerical analysis software was used to calculate the application of different cross-section anti-slide piles in the slope.The numerical results were compared with those of the indoor model test,and the same rules were obtained.And with the comparing results,the bearing behavior of anti-slide piles with different sections is further discussed...