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Three Dimensional Analysis of Diaphragm Walls Supported by Passive Berms

机译:被动巴塞尔斯支持的隔膜墙三维分析

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This paper discusses the stability and performance of embedded retaining structures supported by leaving a temporary earth berm on the passive side of the wall in a thick clay deposit characterized by weak soil properties. The objective of this paper is to verify the suitability of using three dimensional finite element software to simulate a bermed excavation. A three-dimensional finite element analysis using PLAXIS 3D software was used to simulate a case history of a monitored retaining wall with a berm in its front side. Analysis and justification of the different parameters used to model the soil and wall is described in this paper. Two different approaches of analysis were applied and compared to account for the stress dependency of soil strength and stiffness. The applicability of the results and adequacy of software were verified by comparing the computed deflections with the monitoring results and a good agreement was realized. Furthermore, the anisotropy of the diaphragm walls was considered to assess its implication on the wall performance during berm removal, as it's deemed to be the most critical stage during construction.
机译:本文讨论了通过在厚厚的粘土沉积物中留下壁的无源侧,其特征在于薄粘土沉积物的封闭式保留结构的稳定性和性能。本文的目的是验证使用三维有限元软件模拟密布挖掘的适用性。使用PLAXIS 3D软件的三维有限元分析用于模拟在其前侧的受监控挡土墙的壳体历史。本文描述了用于模拟土壤和壁的不同参数的分析和理由。应用了两种不同的分析方法,并比较了土壤强度和刚度的应力依赖性。通过将计算的偏转与监测结果进行比较,实现了对软件的结果和充分性的适用性,并实现了一个良好的协议。此外,认为隔膜壁的各向异性被认为是在再生过程中评估其对墙壁性能的暗示,因为它被认为是建筑过程中最关键的阶段。

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