Research To The Design,Strengthening Mechanism And Effect Of Anti-slide Pile With Pre-stressed Anchor Cable

The stability and reinforce treatments of engineering are problems which people have paid close attention at all times. So far a lot of achievements have been taken out in reinforce measures. But there are a lot of problems still waiting solved. Anti-slide pile with pre-stressed anchor cable is a kind of compound stress structure which uses anti-slide pile and anchor cables to resist the pushing force of landslide. By using it, the cross-section can be reduced and the length shortened, also the construction cost decreased and the construction progress accelerated. So, anti-slide pile with pre-stressed anchor cable is widely used in the field of repairing great slide, especially landslide these years.Through theoretical analysis and numerical simulation, the design, reinforcement mechanism and its evaluation to the anti-slide pile with pre-stressed anchor cable have been studied at large. It has great theoretical meaning and application value, also can offer references to reinforcement treatment.Firstly, improved calculation method is studied against the limitation in the design and calculation to the pre-stressed anchor cable with anti-slide pile nowadays. According to this kind of method, internal stress distribution of anti-slide pile is more reasonable, and is closer to the actually state of anti-slide pile.Secondly, the reciprocity relation of pre-stressed anchor cable, anti-slide pile and rock-soil mass has been analyzed, then the reinforcement mechanism and coordination deformation relative of anti-slide pile with pre-stressed anchor cable are discussed and summarized.Thirdly, safety factor formula is deduced by using general limit equilibrium method, the reinforcement effect is valued by using transfiguration body method and energy method, and the effect is also analyzed by using the safety factor of slope stability.Finally, the safety factor of the slope before and after reinforcement is calculated separately by using general limit equilibrium method and non-linearity FEM. Through the result, the differences between these two calculation methods are analyzed, and also the reason is summarized.