复杂环境下软土基坑分区开挖数值模拟及监测分析  

Numerical Simulation and Monitoring Analysis of Zonal Excavation of Soft Soil Foundation Excavation in Complex Environments

作　　者：周云军 丁盼 ZHOU Yunjun;DING Pan(Greentown Real Estate Construction&Management Group Co.,Ltd.,Hangzhou,Zhejiang 310000,China;Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China)

机构地区：[1]绿城房地产建设管理集团有限公司,浙江杭州310000 [2]浙江理工大学,浙江杭州310018

出　　处：《施工技术(中英文)》2025年第7期71-76,共6页Construction Technology

基　　金：国家自然科学基金(52408405)。

摘　　要：城市复杂环境下软土基坑分区施工策略及开挖顺序对基坑空间变形规律和施工安全性具有显著影响。基于杭州某临水西岸公园基坑工程,运用ABAQUS数值分析软件构建三维实体非线性有限元模型,探讨了基坑开挖不同施工顺序对其侧向变形的影响规律。根据数值分析结果并结合工程现场情况,制定具体的施工策略,并对开挖过程进行全程监测,评估复杂环境下基坑分区开挖方式对其变形的影响。研究结果表明,合理的分区开挖方式可以显著减小基坑变形,而不合理的施工策略则会增加变形控制和支撑轴力的负担。建议采用分区开挖、优化施工顺序、减少基坑暴露时间等方法,在施工过程中要加强监测,及时发现和处理问题,以减轻施工对基坑自身变形及周边环境的影响。The construction strategy and excavation sequence of soft soil foundation excavation in complex urban environments have a significant impact on the spatial deformation law and construction safety of foundation excavation.Based on the foundation excavation project of a waterside West Bank Park in the City of Hangzhou,a three-dimensional solid nonlinear finite element model was constructed by using ABAQUS numerical analysis software.And the influence of different construction sequences of excavation on its lateral deformation was discussed.A specific construction strategy was formulated in accordance with the results of the numerical analysis and the actual situation of the project site.The whole process of excavation was monitored to evaluate the influence of the excavation method on the deformation of the foundation excavation in the complex environment.The results indicate that a reasonable partition excavation method can significantly reduce the deformation of the foundation excavation,while an unreasonable construction strategy will increase the burden of both deformation control and support axial force.To reduce the influence of construction on the deformation of the foundation excavation and the surrounding environment,it is recommended to adopt the methods of partitioned excavation,optimized construction sequence,and reduced exposure time of the foundation excavation.In the construction process,monitoring should be strengthened,and problems should be found and dealt with in time to reduce the influence of construction on the deformation of the foundation excavation and the surrounding environment.

关 键 词：基坑 软土 分区开挖 数值模拟 变形 监测 

分 类 号：TU753.1[建筑科学—建筑技术科学]