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为了深入了解临近开挖施工的基坑与附近既有重力式挡土墙之间相互作用所引起的力学行为,利用快速拉格朗日方法(FLAC3D)建立既有重力式挡土墙与临近基坑开挖的实际模型和等效模型,并通过这2个模型的对比数值模拟,分析了既有重力式挡土墙与临近基坑开挖的相互影响.将重力式挡土墙及其背后土体等效为相应荷载进行模拟,其土体变形和支护结构受力与实际模型模拟的结果较为相似.按照等效模型进行基坑支护结构设计是可行的,但同时也要注意分析重力式挡土墙的稳定性.
In order to deeply understand the mechanical behavior caused by the interaction between the excavation near the excavation and the existing gravity retaining wall, the fast Lagrangian method (FLAC3D) is used to establish the existing gravity retaining wall and adjacent base The actual model and equivalent model of pit excavation are analyzed, and the interaction between the existing gravity retaining wall and excavation near the foundation pit is analyzed through the comparative numerical simulation of the two models. The soil equivalent is equivalent to the corresponding load, and the deformation of the soil and the force of the support structure are similar to the results of the actual model.The design of the foundation pit supporting structure based on the equivalent model is feasible, but also pay attention to the analysis Gravity retaining wall stability.