Mechanics Analysis Of Tendon Anti-slide Pile With Finite Element Method

There is extensive application of anti-slide pile in slide treatment in resent years, especially those with prestressed anchor cables. However, the design theory lags behind engineering application. The design and calculation lacks guidance such as corresponding specifications. Besides experiments, the present domestic and abroad study on anti-slide pile is mainly analysis by traditional cantilever beam method, foundation coefficient method and elastic mechanic method.On the basis of previous studies, this paper carries out a research on relevant design and calculation theory about anti-slide piles, comprising the interaction between anti-slide piles and rock and soil of side slopes, the soil arching model of anti-slide piles and the internal stress calculation method of prestressed anchor cables. The following parts are included in detail.Firstly, a synthesize analysis is carried out on the developments of domestic and abroad studies about anti-slide piles and those with prestressed anchor cables. On basis of the calculation method of residue sliding force, the transfer coefficient method is improved to obtain the slide block balance method, the application scope of which is wider.Secondly, the foundation coefficient method, which is the calculation method of anti-slide piles, is simulated by finite element method. The large scale finite element software ANSYS is adopted to establish finite element model of anti-slide piles and prestressed anchor cables. Springs are used to simulate the action on piles by soil and rocks. The bearing performance of anti-slide piles and those with prestressed anchor cables are compared by illustration examples.Thirdly, on basis of analyzing the previous studies about pile-soil interaction, soil arching theory is applied to analyze the transfer mechanism of sliding thrust between anti-slide piles and soil and rock among piles. A plane soil arch model is established and used to simulate the soil arch effect between anti-slide piles and soil and to study the main influencing factors as well. This serves as a guide for determining the pile diameter and space between piles.Finally, the design and calculation method of prestressed anchor cables of anti-slide piles is studied. On basis of foundation coefficient method and finite element method, the anti-slide piles are dispersed to be rod element. The main...