摘要
本文依托某船闸改建工程,利用COMSOL Multiphysics有限元软件对基坑开挖过程中的双排桩支护结构进行三维数值模拟。研究对比了三维数值模拟与二维计算方法在结构变形方面的差异,并与现场监测结果进行对照,以期为软土地区双排桩支护结构设计提供参考。研究发现,COMSOL Multiphysics三维数值计算结果与实际监测值较为接近,而基于二维计算方法所得结果与实际偏差较大;在软土地区支护结构设计初期应充分考虑土层流变特性,合理折减土层参数,并在施工阶段对桩间土体进行加固处理,以提高土体自承能力。
Based on the reconstruction project of a ship lock,uses the COMSOL Multiphysics finite element software to perform a three-dimensional numerical simulation of a double-row pile support structure during the excavation process of a foundation pit.The study compares the differences in structural deformation between three-dimensional numerical simulations and two-dimensional calculation methods,and validates the results against field monitoring data.The goal is to provide a reference for the design of double-row pile support structures in soft soil regions.The research reveals that the three-dimensional numerical results from COMSOL Multiphysics align closely with the actual monitoring data,while the results obtained using two-dimensional calculation methods show significant deviations.It is recommended that,in the initial design phase of support structures in soft soil areas,the rheological characteristics of the soil layers should be fully considered,soil layer parameters should be reasonably reduced,and reinforcement of the soil between piles should be carried out during the construction stage to enhance the soil's self-supporting capacity.
作者
陈海军
槐伟
柯松
孙志磊
吴哲辉
Chen Hai-jun;Huai Wei;Ke Song;Sun Zhi-lei;Wu Zhe-hui(Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China)
基金
南京水利科学研究院研究生学位论文基金(Yy324007)。
关键词
双排桩支护
有限元模拟
船闸基坑
数值模拟
结构变形
double-row pile support
finite element simulation
lock foundation pit
numerical simulation
structural deformation
