SPT- and CPT-Based Relationships for The Residual Shear Strength of Liquefied Soils
SPT- and CPT-Based Relationships for The Residual Shear Strength of Liquefied Soils
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基于 SPT 和 CPT 的液化土残余剪切强度关系
DOI：
10.1007/978-1-4020-5893-6_1
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
R. Boulanger
中科院分区：
文献类型：
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作者：
I. M. Idriss;R. Boulanger
对含有或建立在可能液化的土壤上的土堤或斜坡的震后稳定性评估需要估计液化土壤的残余剪切强度 Sr。有关是否需要昂贵的缓解措施（包括地面改良工作）的决定通常取决于所选的 Sr 值。本文基于对先前案例研究、实验室测试研究以及有关空隙重新分布机制的最新发现的回顾，提出了建议的基于 SPT 和 CPT 的关系，用于估计现场液化非塑性土的残余剪切强度比 Sr/σ′ vo。推荐的关系为实践中不可避免的任务提供了指导，即必须在可用的病例历史数据之外进行推断。讨论了知识状态的局限性。
An evaluation of post-earthquake stability of earth embankments or slopes that contain, or are founded on, soils that may liquefy requires estimating the liquefied soil’s residual shear strength, Sr. Decisions regarding the need for expensive mitigation efforts, including ground improvement work, often hinge on the selected Srvalues. This paper presents recommended SPTand CPT-based relationships for estimating the residual shear strength ratio, Sr/σ′ vo, of liquefied nonplastic soils in the field based on a review of prior case history studies, laboratory testing studies, and recent findings regarding void redistribution mechanisms. The recommended relationships provide guidance regarding the unavoidable task in practice of having to extrapolate beyond the available case history data. Limitations in the state of knowledge are discussed.