复杂地质条件下超长桩基础沉降数值模拟分析  

Numerical Simulation Analysis of Settlement of Ultra-long Pile Foundations under Complex Geological Conditions

作　　者：蒋兆威 JIANG Zhaowei

机构地区：[1]中铁建设集团有限公司,广东汕头515054

出　　处：《重庆建筑》2024年第10期57-60,共4页Chongqing Architecture

摘　　要：以某高铁站地下超长群桩基础为例,针对复杂地质条件下超长桩基础沉降、竖向承载特性开展研究,通过模拟桩基础与桩周不同土层的沉降变化和应力分布,深入探讨不同土层环境下超长桩基础沉降问题,并分析桩-土之间的相互作用。研究发现:超长桩基础在承载荷载下沉降呈现出缓慢变化的特点,主要应力集中在桩身上半部分;不同土层中,花岗岩为主要持力层,超长桩基础深入持力层,形成桩-土协同作用,由于花岗岩的强度远高于其他土层,所以沉降量较小。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 ultralong 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.

关 键 词：超长桩 土体沉降 土分层 ABAQUS 数值模拟 

分 类 号：TU473.1[建筑科学—结构工程]