Research on Deformation and Stress Characteristics of Slide-resistant Piles Under Different Strata Thickness Ratios in Soft and Hard Strata
In order to study the deformation and stress characteristics of anti sliding piles under different strata thickness ratios in soft and hard strata,based on a railway landslide support project,numerical simulation calculations were conducted to analyze the displacement,bending moment,and shear force changes of slide-resistant piles.The research results show that under the action of landslide thrust,as the distance from the pile top increases,the displacement of the slide-resistant pile body gradually decreases,the bending moment of the pile body first increases and then decreases,and the shear force of the pile body first increases and then decreases and then increases.As the strata thickness ratio gradually decreases,the displacement of the slide-resistant pile body gradually increases.The trend of bending moment variation of slide-resistant pile body is similar under different strata thickness ratios.When all slide-resistant piles are embedded in soft rock,the displacement,bending moment and shear force of the pile body are maximized.When the strata thickness is relatively large,the thickness of hard rock is the main factor affecting the displacement and bending moment changes of the slide-resistant pile body.When the strata thickness is relatively small,the thickness of soft rock is the main factor affecting the displacement and bending moment changes of the slide-resistant pile body.In the process of landslide support,when the thickness of soft rock is large,the stiffness or cross-sectional area of the slide-resistant pile should be appropriately increased.
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