Anti-sliding Pile With Multi-row Prestressed Anchoring Cables And Soil Interaction Analysis

The anti-sliding pile with multi-row prestressed anchoring cables is a new retaining structure in combination with multi-row prestressed cables and anti-sliding pile,which is able to quickly restore and increase the landslide stabilizing force to the steady landslide, especially for prevention and treatment of engineering landslide and landslide or important buildings at the leading edge of the landslide.The anti-sliding pile with prestressed anchoring cables composite structure has been widely used because of its significant advantages. However,the study interaction mechanism and the theory of computation of the anti-sliding pile with multi-row prestressed anchoring cables are far behind in engineering applications. Therefore, the study interaction mechanism,load transfer path, coordination function and mechanical properties of the anti-sliding pile with multi-row prestressed anchoring cables and soil have a great significance in the practical application of anti-sliding pile with prestressed anchoring cables.The main research work of the thesis is as following:â‘ T he interaction mechanism and load transfer path of the anti-sliding pile with multi-row prestressed anchoring cables and soil are analyzed, namely soil arching effect of the anti-sliding pile with prestressed anchoring cables. The formation conditions and influencing factors of the horizontal arching and vertical arching and the formulas of the critical pile spacing and cable spacing are derived.â‘¡On the basis of the summary and analysis the distribution form of landslides thrust and soil resistance on the general piles,considering the cables prestressed to impact the distribution form of landslides thrust, the distribution form of landslides thrust on the anti-sliding pile with prestressed anchoring cables is proposed to be modified.â‘¢A ccording to the actual stress state of the anti-sliding pile with prestressed anchoring cables,the improved deformation compatibility and force coordination equation are proposed.The control scope coefficient k of the cable prestressing is introduced and the formula of multi-row cables tension are derived.â‘£With slope treatment project in Chongqing Mansion, considering the anti-sliding pile with prestressed anchoring cables and soil as a whole, the three-dimensional elasto-plastic finite element model of ANSYS is established to simulate the anti-sliding pile with prestressed anchoring cables.At first strength reduction finite element method is adopted to analyse the landslide stability before and after strengthening respectively. Compared with the results calculated by finite difference FLAC3D.Secondly changing a single factor(the external conditions,cable design parameters and pile design parameters) method is adopted to analyse the influencing law of the slope displacement,the displacement and internal force of the pile.In addition the design parameters of anti-sliding pile with prestressed anchoring cables are optimized the combination. Finally the soil arching effect's formation law and influencing factors of anti-sliding pile with prestressed anchoring cables are simulated.