Research On The Design Method And Application Of Anti-slide Piles In Slope Engineering

Based on the previous research,the Guizhou highway slope engineering is selected as the research object to investigate the stress characterization of anti-slide pile for verifying the rationality of circular anti-slide pile,through the theoretical calculation and field monitoring.The large-scale numerical analysis software FLAC3D is used to build the numerical model for the analysis of the influence of the different parameters,including the distance of the pile,the diameter of the pile and the anchorage depth etc.,on the performance of large diameter circular anti-slide pile,and further obtain its optimal design parameters.This work will provide the engineering experience for the application of large diameter circular anti-slide pile in the engineering of slope treatment,and will also provide a reference for subsequent design.The main results are illustrated as follows:(1)Through the comparative analysis of artificial digging pile and mechanical pile,it can be found that the circular anti-slide pile with mechanical perforation is superior to the rectangular artificial digging pile in the construction rate,safety,economy and convenient performance.Meanwhile,due to the development of mechanical equipment,the circular pile cross-sectional size has been greatly improved to meet the needs of large-scale slope management.(2)Using the on-site monitoring technology,the monitoring of slope and large diameter circular anti-slide piles are carried out.Based on the deformation and stress distribution of the pile body,the stress distributed in the pile is analyzed.The field monitoring value is compared with the theoretical calculation value,and their difference is analyzed,which is helpful for the optimization of the design parameter of pile applied in the subsequent engineering.(3)A three-dimensional numerical model is established to investigate the reinforcement effect of large diameter circular anti-slide pile on the slope.The parameters like the distance between pile and pile,pile diameter and anchorage depth were respectively analyzed by single factor method to research the changing rule of the deformation of anti-slide pile and stress in it with the the design parameters of the pile.Thus,the optimal range of pile spacing,anchorage depth and pile diameter is put forward.The numerical analysis is used to contrastively analyze the reinforcement effect of the optimized and unoptimized anti-slide pile,and the optimal design scheme of the anti-slide pile is obtained.