Study On The Calculating And Designing Method Of Anti-sliding Pile With Pre-stressed Anchored Cables Based On Comptible Distortion

With the rapid development of water conservancy and hydropower project onstruction, as well as large-scale key projects of the growing number of landslide control project becomes less prominent, which has been attached great importance to landslide control measures by geotechnical engineering departments,and the results of research about landslide control have also been made for a very great achievement. Which, anti-sliding pile with the prestressed anchor is created as a new type of anti-slide retaining structures with the applications of anchor in slope engineering.This technique relative to the general anti-sliding pile, its mechanical condition is more reasonable, can reduce the cross-section and embedded depth of the pile.The project costs can been reduced significantly, so such structure is widely used in the field of repairing landslide .The main research in this paper are as follows:1.Through the interaction research of rock-soil and the pile-anchor. The landsliding thrust transmission mechanism and its distribution of forms before and after anti-sliding piles is analyzed and summarized landslide thrust calculation methods; derived formula for calculating the thrust of the landslide; Mechanical effects of the soil arching between piles is analyzed , and the biggest pile spacing formula was derived. Through the mechanism research of pile-anchor's co-operation and put forward an improved calculation model of pile-anchor deformation of the coordination, as well as the corresponding deformation of the coordination of equations, in order to provide a basis for the calculation of anchor cable tension.2.Through the analysis about the existing design and calculation method of the anti-sliding pile with prestressed cables,and aiming at the existing problems and proposed an improved calculation method and to establish a more realistic calculation model of the anti-sliding piles with prestressed anchors. On this basis, According to the construction order of the anti-sliding pile with prestressed cables and its force characteristics . the calculation of the anti-sliding pile with prestressed cables is carried out by two-stage,that is tension phase and the stabilization phase of deformation, force calculation formula of the anti-sliding pile with prestressed cables is derived in this paper according to elastic pile model and rigid pile model.3. Through the analysis about the existing calculation method of the cable tension on the anti-sliding pile with prestressed cables,and aiming at the existing problems,based on the improved equation of the displacement of deformation coordination of the anchor- pile, according to the actual force characteristics of the anti-sliding pile with prestressed cables, from the prestressing phase and the stability phaseof the anchor anti-slide Pile, The cable tension calculation formula of the anchor anti-slide Pile is gived in this paper according to elastic pile model and rigid pile model.4. The design steps of the the anti-sliding pile with prestressed cables are summarized. At last combined an engineering example, Internal forces on the anchor anti-slide pile is calculated by the method in this paper,and the calculation results are compared with the analysis results by the method of the predecessor, accordingly demonstrate the method proposed in this paper is reasonable.