摘要
基坑群工程的分坑方式与开挖流程对基坑及周边环境的影响及其叠加效应较为复杂,采用规范规定的设计计算方法难以进行分析。以上海软土地区某基坑群工程为背景,建立多种概念模型,总结不同分坑方式对周边环境的影响规律,分析相邻基坑不同开挖顺序对周边环境影响的叠加效应,研究成果用以指导基坑群工程的总体分区与工况设计。监测数据表明,该基坑群工程按设计分区和工况实施对周边环境影响总体可控,尤其对运营地铁等敏感保护对象影响较小。分析结果与设计对策可供类似工程参考。
The divided pit excavation and excavation process of foundation pit group engineering are complex,and the environmental impact superimposed effect is significant.The above problems cannot be analyzed by the standard design and calculation method.Taking a project in a soft soil area of Shanghai as the background,a variety of conceptual models were established to analyze the impact of different divided pit excavation of large-area foundation pits on the surrounding environment,and analyze the superimposed impact of different excavation sequences of adjacent foundation pits on the environment,and guide the overall zoning and working condition design of foundation pit group projects.The monitoring data showed that the impact of the project implementation on the environment is generally controllable,and the key strengthening areas have little impact on the sensitive protection objects such as the operating subway.The relevant analysis results and design countermeasures can be used as a reference for similar projects.
作者
沈健
胡耘
王惠生
Shen Jian;Hu Yun;Wang Huisheng(Shanghai Engineering Research Center of Safety Control for Facilities Adjacent to Deep Excavations,Shanghai 200011,China;Shanghai Underground Space Engineering Design&Research Institute,East China Architecture Design&Research Institute Co.,Ltd.,Shanghai 200011,China)
出处
《岩土工程技术》
2024年第2期143-148,共6页
Geotechnical Engineering Technique
关键词
基坑群工程
环境影响
分区方式
叠加效应
数值分析
foundation pit engineering group
environment impact
divided pit excavation
superimposed effect
numerical analysis
