Research On Optimization Of High Slope Rei Reinforced By Anti-slide Pile With Pre-stressed Anchor Cables

Pre-stressed anchor cables and anti-slide pile is a new supporting structure which composed of pre-stressed anchor cable and anti-slide pile retaining structure, the stress and structure is more reasonable, and it possess other two retaining structures’advantages, in actual engineering, it can not only give full play to the strength of material but also to meet the reasonable economic requirements, and can greatly improve the requirements of the overall stability of the slope. It has been widely used in engineering, but the theoretical research has not yet made a larger breakthrough, the actual results are far behind engineering practice. According to the research status at home and abroad, combined with the related research results, in-depth analysis of the supporting effect by use the large-scale finite element analysis software MIDAS/GTS of anti-slide piles with pre-stressed anchor cables. Compared with the simulation and engineering results, verification of the selected model parameters are reasonable. Select slope safety factor as objective function in this paper.To the section size of anti-slide piles, pile anchorage depth of anti-slide pile position, buried, spacing between piles and anchor length, anchor direction angle and anchor cable prestress parameter selection for further optimization.Then get the pile, anchor, slope in the best optimization parameter, pre-stressed anchor cable anti-slide pile can provide the minimum resistance or play a maximum safety coefficient.To provide a reference to select the related parameter optimization for high slope engineering similar.In this paper, the main work includes the following aspects:1、By reading a lot of literatures, discuss the research on reinforcement present situation of pre-stressed anchor cable and anti-slide pile from the test, calculation and optimization design on three aspects.Then analysis of the difference between two kinds of supporting str-ucture alone support and combined support2、Discusses the main adopted constitutive model by the theory of finite element and constitutive relationship, summarizes the application conditions of different constitutive models and scope, select constitutive model suitable for the actual situation of this article. Meanwhile, introduce the research thinking of finite element numerical simulation analysis and related supporting structure model.3、Combined with the K21+240geologic information of the coastal highway in western slope, used in, analysis of the slope of the displacement characteristic and stability and internal force of support structure in different stages and different support conditions by using MIDAS/GTS finite element software. Compared with the simulation and actual monitoring results, arrival at a rule of slope displacement and stability and distribution of internal forces of supporting structure force distribution.4、Based on the original model, adjust related parameters, such as changing the pile section size, pile depth, pile spacing, depth of adjacent anchor, anchor inclination and cable stress, analysis influence on slope displacement and internal force with the change of parameters, then arrival at an optimal value.Based on the parameters of the rational model, select the slope safety factor as the main target function, using single factor method to optimize pile section size, pile depth, pile embedded location, adjacent pile spacing, anchoring length, angle of pre-stressed anchor cable and the size and related parameters, get the anti-slide pile with pre-stressed anchor cable can provide the minimum resistance or play a maximum safety coefficient, finally obtains the corresponding optimal value.5、Summarize and conclude the main research results of this article, points out the shortcomings and problems to be further solved problems, and then put relate forecast forward on the original basis of the anti-slide pile and prestressed anchor cable supporting technology.