摘要
基于深厚软土刚性桩复合地基工程实例,运用ABAQUS有限元软件,对褥垫层厚度为0.6 m~1.2 m的深厚软土刚性桩复合地基进行数值模拟,研究褥垫层厚度对刚性桩复合地基沉降量及桩土应力比的影响。结果表明:随褥垫层厚度增加,地基沉降量增大,桩土应力比先减小后缓慢增大。当褥垫层厚度为1 m时,桩土应力比最小,此时厚度为最优褥垫层厚度。因此,采用大厚度褥垫层刚性桩复合地基加固深厚软土地基能有效的降低地基桩土应力比,充分发挥桩间土的承载作用。
The performance of a cushion layer with a thickness of 0.6m to 1.2 m over the rigid column improved soft soil layer is numerically simulated by using ABAQUS software.The cushion thickness on the stress ratio in the soil-column system and the settlement characteristics are evaluated.The results indicate that with the increase of cushion thickness,the foundation settlement increases,and the column-soil stress ratio decreases first and then increases slowly.When the cushion thickness is one meter,the column-soil stress ratio is the smallest,and this thickness is the optimal cushion thickness.Therefore,the use of large thickness cushion in the rigid column composite foundation for the soil improvement of thick,soft soil area can effectively reduce the stress ratio of foundation column to soil and the soil contribution to the bearing resistance could be fully utilized.
作者
蒲斯琦
陈俊桦
苏春晖
PU Siqi;CHEN Junhua;SU Chunhui(School of Architecture and Traffic Engineering,Guilin University of Electronic Technology,Guilin 541004)
出处
《土工基础》
2023年第6期966-970,共5页
Soil Engineering and Foundation
基金
广西高校中青年教师科研基础能力提升项目(2020ky05036)
广西基地人才计划项目(桂科AD21220051)。
关键词
褥垫层
数值模拟
刚性桩复合地基
地基沉降
桩土应力比
Cushion Layer
Numerical Simulation
Rigid Column Composite Foundation
Foundation Settlement
Column-Soil Stress Ratio
