三维数值仿真计算分析在多种支护结构项目中的应用  

Application of Three-dimensional Numerical Simulation Calculation and Analysis in the Project with Multiple Support Structures

作　　者：张成武 左人宇 朱玉清 ZHANG Chengwu;ZUO Renyu;ZHU Yuqing(Shenzhen Gongkan Geotechnical Engineering Co.,Ltd.Shenzhen 518000,China)

机构地区：[1]深圳市工勘岩土集团有限公司岩土工程设计所,深圳518000

出　　处：《广东土木与建筑》2025年第3期53-57,共5页Guangdong Architecture Civil Engineering

摘　　要：以深圳市南山区某山地基坑支护项目为背景,考虑土体的小应变刚度特性,采用有限元软件PLAXIS3D建立由多种支护结构组成的三维非线性数值计算模型,分析多种支护结构基坑开挖全过程中不同支护结构间的相互影响及变形协调作用,以及对项目周边建筑物的影响。计算结果表明,邻近建筑物的变形场明显受到基坑开挖的影响,临近放坡段阴角处沉降值较小,越靠近放坡段阳角处沉降值越大,但建筑物差异沉降值满足相关规范要求。同时也揭示了多种支护结构间存在相互作用及变形协调关系。Taking a mountainous foundation pit support project in Nanshan District,Shenzhen as the background,considering the small strain stiffness characteristics of soil,a three-dimensional nonlinear numerical calculation model composed of multiple types of support structures was established using the finite element software PLAXIS 3D.The mutual influence and deformation coordination between different types of support structures during the entire excavation process of the foundation pit with multiple types of support structures were analyzed,as well as their impact on the surrounding buildings of the project.The calculation results show that the deformation field of adjacent buildings is significantly affected by the excavation of the foundation pit.The settlement value at the inner corner of the adjacent sloping section is smaller,and the settlement value at the outer corner of the sloping section is larger.However,the differential settlement value of the buildings meets the relevant specifications.At the same time,it also reveals the interaction and deformation coordination relationship between multiple types of support structures.

关 键 词：基坑支护设计 多种支护形式 数值模拟 土体小应变硬化模型 

分 类 号：TU476.3[建筑科学—结构工程]