The inter-bedded layers of sand and clayey soils of the 'Perth Formation' (often referred to as the 'Guildford Formation') underlying Perth CBD provide significant challenges for geotechnical engineers. Surprisingly, no systematic laboratory investigation of the 'Perth Formation' has been published to date and designers use in situ test data almost exclusively to provide parameters for foundation design. To address the shortage of element test data in the public domain, this paper presents the findings of a laboratory investigation supplemented by in situ test data for a typical 9 m thick horizon of the 'Perth Formation' at St Georges Terrace in the centre of Perth CBD. The paper provides results from classification tests including electron microscopy and X-ray diffractometer analyses in addition to state-of-the-art triaxial, simple shear and oedometer tests. The in situ test data are compared with these results to provide a basis for comparison at other sites in the Perth area.
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机译：珀斯CBD下方的“珀斯地层”（通常称为“吉尔福德地层”）的砂土和黏土的层间层对岩土工程师提出了重大挑战。出乎意料的是，迄今为止尚未发布有关“珀斯地层”的系统实验室研究报告，设计人员几乎只使用原位测试数据来为基础设计提供参数。为了解决公共领域中元素测试数据的短缺问题，本文介绍了实验室研究的结果，并补充了珀斯中心St Georges Terrace“珀斯组”典型9 m厚地平线的原位测试数据CBD。本文提供了分类测试的结果，包括电子显微镜和X射线衍射仪分析，以及最新的三轴，简单剪切和里程表测试。将原位测试数据与这些结果进行比较，以提供在珀斯地区其他站点进行比较的基础。
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