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深基坑降水会引起周围土体应力的重分布,造成基坑相邻建筑物的附加沉降。应用地下水动力学的非稳定渗流原理及土力学的基本理论,对基坑降水设计引起的周围地面沉降进行预测,并建立数值分析模型对实际施工工况进行模拟,分析结果可为上海地区城市开发过程中的地铁隧道保护提供理论依据与工程案例参考。
Deep foundation pit dewatering will cause the stress of the surrounding soil redistribution, resulting in additional settlement of the adjacent pit excavation. The unsteady seepage principle of groundwater dynamics and the basic theory of soil mechanics are applied to predict the surrounding land subsidence caused by the design of foundation pit dewatering and establish the numerical analysis model to simulate the actual construction conditions. The analysis results can be used for the urban development in Shanghai Subway tunnel protection in the process of providing theoretical basis and project case reference.