The Effect Analysis And Simulation Of Excavation Of Engineering Pile In Soft Soil Area

Weakly genetic errors will lead to the bearing capacity of pile foundation of excavation unloading loss and deviation of pile and tensile damage, on the other hand,due to the rheological, plastic yielding and consolidation of soft soil itself characteristics caused by relative displacement, which produces thrust to pile foundation, pile foundation generate large bending moment and then leads to destruction, reduce the pile foundation of the bearing and the ability to resist deformation. Nowadays,there have been many at home and abroad due to soil mass excavation unloading of pile foundation engineering accidents.The research content of this article is based on this background, the analysis of foundation pit in soft soil area under the influence of excavation unloading, the interaction mechanism of piles and soil and pile body stress and strain, to better understand and evaluate the safety of the excavation, so as to guide the foundation pit excavation. In this paper,by setting the different excavation pile in the process of excavation under the condition of stress deformation condition and limit of study as the breakthrough point,by adopting the combination of theoretical analysis and numerical simulation method to study the excavation unloading of soil under the condition of deformation and stress of piles and soil properties.(1)plane model is established, a preliminary verifies the correctness of material parameters selection, and a preliminary analysis of the behavior of deformation and stress in the process of single pile in construction.(2)the different condition of pile deformation and stress in the process of soil excavation, etc, were calculated, the purpose is to optimize the excavation of foundation pit construction process.(3)establish three-dimensional structure model in using ABAQUS and calculation analysis, get some engineering pile under flow deformation and stress distribution of soil mass under the action of regular conclusions, and analyzes the regularity of deformation and stress of soil Discusses the different slope angles,different excavation method and different pile spacing and slope toe of the influence law of the net distance on the behavior of pile reaction.