The Study And Development Of CAD System For Stabilizing Piles With Pre-stressed Anchored Cables

Landslide is a kind of slope geologic hazard which usually occur and cause extremely damage. Concerned it's usually happened in country's western mountain area, the research work about landslide's prevention and control must be done. The anti-slide pile become widest application in the landslide prevention and control project. Compare with common anti-slide piles, the prestressed anchor cable anti-slide pile, which is the new type retain structure come into use by the project application of anchor cable, have more logical strained condition and can effective control pile body's displacement with relevant stress distribution, and get extensive application. But because of the complicacy of interrelations between anchor-pile structure and landslide mass, the research about the prestressed anchor cable anti-slide pile's mechanism of action still under exploration stage, and it's mechanics computation model,computing method and project application still need to further improve.In this article, the author made analysis and summary for the interrelation among piles, anchors and soil body, probe into the problems about pile-anchor structure's compatible distortion which exist in the present prestressed anchor cable anti-slide pile's mechanics model, and also tried to build reasonable mechanics computation model. Then the author made research about the present prestressed anchor cable anti-slide pile's design, used developed computing method to solve the built mechanics computation model, and also used developed structure design method to finish the structure design. Finally the author used Visual C++ to develop the program, to complete the present prestressed anchor cable anti-slide pile's structural calculation and structure design, and automatic made the contract drawing.Through the research and summarize, the thesis got some conclusions and achievements which shows below:1 After analysis some of pile-anchor structure integrate reconfiguration factors in the existing literature, and considered the pile had already deformation when the prestressing force working, the author developed the pile-anchor structure deformation factors and built the integrate deformation equations. The improved models more fit for the piles and anchor's real force situation;2 From the literature analysis, the author summarized that the pre-reinforcing force only limit the deformation which caused by the prestressing force to the stage pile body,and the force have no too much influence to the pile body stabilize stage's mechanics computation model, the slide force don't need require deduction;3 The author improved the prestressed anchor cable anti-slide pile's mechanics computation model based on the pile-anchor structure's coordination effect. the author used the traditional computing method to try to solve the improved prestressed anchor cable anti-slide pile's elastic pile and rigid pile mechanics model, and then derivate the anchor cable's prestress amount or tension amount's formula;4 When use the Visual C++ to write the program, the author used two kinds of algorithm which are matrix analysis method and finite difference method, to finally achieve the mechanical calculation about the prestressed anchor cable anti-slide pile's mechanics computation model which the author used in this thesis, and autogeneration the shift diagram about bending moment, shearing force and pile body, finally the author was running the design about pile body reinforcing bars and anchor- chain structure, and automatic mapping;5 At final stage, the author made case history comparing, as result, because the anchor cable was concerned the pile and anchor's stress coordinate and then reduced the pile and anchor's bearing capacity design value, the project investment was effective economized.