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Fracture mechanics in ground improvement design

机译:地基改良设计中的断裂力学

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This paper discusses the mechanical response of shallow footings on a double-layer system where the upper layer is artificially cemented. The study combines measurements from small-scale laboratory models and results from numerical analysis based on a discrete element method. Both experimental and numerical evidence identifies the propagation of fractures within the cemented layer as having a dominant effect that controls the load-settlement response of the footing. A discrete method of fracture propagation was applied to soil mechanics and proved to be capable of capturing essential features of the failure mechanism developed under the footing. Data from various thicknesses, degrees of cementation and compaction energies of the cemented layer are reported, the combined analysis of which yields detailed and pertinent information on the design of strip footings on a double-layer system.
机译:本文讨论了在双层系统上浅层基础的机械响应,其中上层是人工胶结的。这项研究结合了小规模实验室模型的测量结果和基于离散元素方法的数值分析结果。实验和数值证据均表明,胶结层内裂缝的扩展具有控制支脚荷载沉降响应的主导作用。一种离散的裂缝传播方法被应用到土壤力学中,并被证明能够捕获在基础下发展的破坏机制的基本特征。报告了来自胶合层的各种厚度,胶结度和压实能的数据,对这些数据的综合分析得出了双层系统上带状基础设计的详细而相关的信息。

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