By Stabilizing Piles For Landslide Support Design Theory

Along with the society's development, the land resource is getting much tighter. The humanity can not but excavate the mountains and massifs, then use the limited cut slopes to construct kinds of engineering constructions and buildings, this brings the question of slope stability. As an effective landslide control measure, the anti-sliding pile holds an important status in global. According to statistics, it is the most applied measure in landslide until now. The commonly used anti-sliding pile force analysis method separates the landside and the anti-sliding pile, and considers that the interaction between landside and anti-sliding pile as a simple force function, neglects the distortion coordination and stress coordination between landside and anti-sliding pile. In fact, the soil-arch effect is the fundamental mode of landside and anti-sliding pile, which is related to the anti-sliding pile can exert fully function or not. Considering the various influence factors and the complex interaction between them, this article studies on soil-arch effect, research the supporting and detaining structures of anti-sliding pile system,the passive earth thickness and the optimization design of anti-sliding pile.Through the finite difference software, model,calculate and then analyze the anti-sliding pile system, summarize various factors influence to soil-arch effect, finally propose that methods of the supporting and detaining structures of anti-sliding pile system,the passive earth thickness and the optimum design of anti-sliding pile. Specifically,has carried out following several researches:1) Thrust calculation of soil between piles and anti-sliding design. Use the finite difference software to prove the existing of pressure arch, calculate the relations among size of pressure,soil parameter and pile spacing; Then discover the method of thrust calculation of soil between piles through pressure arch theory;Proposed the design theory of the retaining wall and reinforced concrete anti-sliding pile after consideration soil-arch effect.2) The passive soil thickness in front of anti-sliding piles.Through the theoretical analysis, proposed that regarding to special geological condition, should check calculation of slope rock pile foundation stability and ultimate lateral bearing capacity, guarantee that the passive soil's thickness achieves the design requirements.3) The optimization of anti-sliding pile. According to the stress distribution situation which calculates, consider construction convenient and economic factors carry on the reinforcement placement; finally comprehensively consider economic factors and construction safety,optimize the anti-sliding pile.The paper main innovation work is as follows:1) According to mechanics principle, proposed the theoretical calculation method of soil-arch between piles;2) Fully using the soil-arch effect, proposed the design concept of soil between piles supporting and retaining structure;3) Proposed the theory that regarding to special geological condition, should check calculation of slope rock pile foundation stability and ultimate lateral bearing capacity, carry out the method to calculate passive soil's thickness;4) Put forward the anti-sliding pile system's optimum design method.