Fundamental Study of Pressuremeter Testing in Stiff Clay

传统上，硬粘土的设计和分析参数是 更多的是根据有根据的猜测和过去的经验来选择 而不是直接测试结果。 这对于以下值尤其如此： 侧土压力模量和系数。 以试图 减少了参数定义过程中的主观性， 越来越多的人使用一种或其他形式的压力计， 以坚硬的粘土为特征。 这项研究是一项多阶段的努力 包括现场、实验室和分析方法， 深入了解硬粘土的压力计测试。 近 理想的硬粘土介质位于弗吉尼亚州的里士满，用于测试， 并进行了初步的实验室工作。 的结果 研究应加强对硬粘土反应的理解， 压力计加载，并帮助定义适当的技术， 在硬粘土中进行压力计测试。

Traditionally, design and analysis parameters for stiff clays are selected more on the basis of educated guesswork and past experience than from direct test results. This is particularly true for values of modulus and coefficients of lateral earth pressure. In an attempt to reduce the subjectivity in the parameter definition process, there is a growing trend to use one or other forms of pressuremeter in characterizing stiff clays. This research is a multi-phased effort involving field, laboratory, and analytical approaches designed to provide insight into pressuremeter testing of stiff clays. A near ideal stiff clay medium has been located in Richmond, VA, for testing, and preliminary laboratory work has been performed. The results of the research should enhance the understanding of stiff clay response to pressuremeter loading and help define the proper techniques for pressuremeter testing in stiff clays.