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Profiling In-Situ Stresses in Clays Using Penetrometer Test Results

机译：使用渗透计测试结果分析粘土中的原地应力

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摘要

In this paper, a penetrometer-based methodology for characterizing in-situ stresses in clays is proposed. For this purpose, a correlation model between the effective stress and the penetration resistance is established. Piezocone and T-bar penetrom-eters, both of which are commonly used in practice, are introduced into the proposed method. The proposed correlation model is given as a function of the penetration resistance, penetration resistance factor and strength increase ratio, considering that the penetration resistance and undrained shear strength are both governed by the effective stress. To check the validity of the proposed method, case examples are selected and used to compare measured and predicted in-situ effective stress profiles. It is observed that the predicted stress profiles agree well with the measured profiles for both piezocone penetration test (PCPT) and T-bar test cases. The effect of soil constitution on the effective stress for the proposed method is also examined.
机译：在本文中，提出了一种基于渗透计的方法来表征粘土中的原地应力。为此，建立有效应力和抗穿透性之间的相关模型。在实践中常用的压电锥和T型杆渗透仪被引入了所提出的方法中。考虑到抗穿透强度和不排水抗剪强度均受有效应力支配，给出的相关模型是抗穿透强度，抗穿透系数和强度增加率的函数。为了检查所提出方法的有效性，选择了案例实例，并将其用于比较实测和预测的现场有效应力曲线。可以观察到，对于压电锥渗透测试（PCPT）和T型杆测试案例，预测的应力分布与测量的分布非常吻合。还研究了土壤成分对所提出方法的有效应力的影响。

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