Design And Application Of Frame Type Double Row Anti-slide Pile In Landslide

The reinforcement and control of large landslide is affected by many factors,such as geological conditions,project investment,construction period,construction risk,etc.Based on the actual project of excavating a huge landslide in linxi to zhijin railway,this paper studies and analyzes a new type of frame double-row anti-slide pile structure.The main research results are as follows:(1)It is verified that the rectangular distribution is used to simplify the reasonableness of the landslide thrust,and the magnitude of the landslide thrust is calculated according to the transfer coefficient method.The resistance of the slope is the minimum value of the passive earth pressure,the residual anti-sliding force and the elastic resistance;(2)A simplified calculation model of the internal force of the frame-type anti-slide pile is proposed.The frame-type anti-slide pile is decomposed into three sub-structures,and the structural mechanics and elastic foundation beam theory are used to calculate respectively.(3)The calculation results of numerical simulation verify the correctness of the theoretical calculation method.At the same time,the internal force distribution of the frame anti-slide pile in the numerical calculation is consistent with the theoretical calculation,and the numerical calculation value is generally smaller than the theoretical calculation value.(4)The change of pile spacing has great influence on the internal force deformation of the structure.The anchorage depth of front and rear piles has little influence on the force and deformation of the structure.The increase of beam stiffness can improve the structural stress and reduce the horizontal displacement of the structure.(5)The results of the model test obtained the soil pressure distribution characteristics of the frame-type anti-slide pile under the action of different landslide thrust,which verified the correctness of the theoretical hypothesis.At the same time,it reveals the internal force and deformation response law of the frame anti-slide pile under different landslide thrust,and the dangerous section appears at the junction of pile and beam,which is consistent with the theoretical analysis and verifies the rationality of the theoretical calculation.(6)Based on the concept of BIM,with the help of Revit software,the parametric design of the frame-type double-row anti-slide pile structure is carried out,the BIM model of the frame-type anti-slide pile is established,and the virtual construction simulation of the frame-type anti-slide pile is carried out to obtain the design advantages based on the concept of BIM.