Numerical Simulation Analysis of Settlement of Ultra-long Pile Foundations under Complex Geological Conditions
Taking the underground ultra-long pile group foundation of a high-speed railway station as an example,this paper studies the settlement and vertical bearing characteristics of ultra-long pile foundations under complex geological conditions.By simulating the settlement variation and stress distribution of the pile foundation and different soil layers around the piles,the settlement issue of ultra-long pile foundations in different soil layer environments is deeply discussed,and the interaction between piles and soil is analyzed.The research finds that the settlement of ultra-long pile foundations exhibits slow changes under load,with the main stress concentrated in the upper half of the pile.Among different soil layers,granite serves as the main bearing layer,and the ultra-long pile foundation penetrates into the bearing layer,forming a pile-soil synergistic effect.Due to the much higher strength of granite compared to other soil layers,the settlement is relatively small.
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