Research And Application Of Internal Force Calculation Method Of Anti Slide Piles Considering Soil Resistance Before Anti Slide Piles

The anti-slide pile has been developed as an important anti-slip retaining structure for slope support and landslide remediation.Its calculation method is directly related to the effect of landslide treatment and the project cost.However,the design method of anti-slide pile is not mature.Therefore,the design of anti-slide pile still needs to be further improved and supplemented.Based on the actual engineering,this paper mainly focuses on whether or not considering the pile front soil resistance and how to calculate the anti-slide pile internal force.the method of theoretical analysis and numerical simulation is used to perfect the internal force calculation formula of anti-slide pile.The main research work and achievements are as follows:(1)Based on the previous research results of the relevant scholars,the paper summarizes the design and calculation contents of the anti-slide piles,the determination of the landslide thrust and the elastic resistance of the soil,and the calculation method of the elastic anti-slide piles.This lays the foundation for the further study of the thesis.(2)The three-dimensional numerical model was established.For the same slope,the internal force and lateral displacement of the anti-slide pile considering the soil resistance before the pile and without considering the soil resistance before pile were compared and analyzed.The necessity of considering the resistance of soil before pile is verified.Through numerical simulation analysis of soil resistance under the condition of 5 kinds of strength parameters and 7 kinds of pile soil slope before the combined conditions before pile soil resistance,when the anterior surface of the pile slope more than 40 degrees,in front of the pile soil resistance effect can be ignored,they can be regarded as a kind of anti slide piles in slope safety reserves.(3)Based on the landslide thrust,the distribution pattern of the soil resistance of the pile and the position of resultant,the new derivation formula considering the soil resistance before the pile is obtained.Combined with engineering examples,three kinds of anti-slide pile internal force calculation method and numerical simulation results were compared and analyzed.The results show that the theoretical method of the internal force of the anti-slide pile is in good agreement with the numerical solution.(4)The calculation method of the anti-slide pile structure is summarized.Based on the internal force calculation formula of anti-slide pile of considering or unconsidering the soil resistance before the pile.Optimizing the reinforcement ratio of anti slide pile.It can save the project cost and has certain economic efficiency...