Research on 1 International Standardization of Geotechnical Investigation Method by Considering Locality of Natural Ground

在这份报告中，一些关于现场/实验室测量波速的细节，以及它们的比较，铭记上述的“三位一体”。讨论了原位地震试验在了解各种岩土材料工程特性中的应用。最后，详细介绍了两个工程实例，每个实例都说明了现场地震勘探在岩土工程勘察中的重要性，并讨论了岩土材料剪切特性中的准弹性刚度。本文概述了用现场地震测量方法测量天然地基弹性波速度的最新进展，以及在实验室中进行弹性波速度的可比测量。结合现场/实验室测量的应用，讨论了QES和强度之间的相互联系，实验室样品的质量和天然沉积粘土的现场“结构”。本文介绍了两个现场地震勘测的重要性：一是曼谷地铁工程中深基坑开挖引起的软土地基变形预测;二是2003年9月在比萨斜塔进行的岩土工程现场勘测。

In this report, some details regarding in-situ/lab measurements of wave velocity, together with their comparisons are outlined, bearing the above-mentioned 'trinitarianism' in mind. Application of in-situ seismic tests in understanding engineering properties of various geomaterials is discussed. Lastly, two case histories, each demonstrating the importance of in-situ seismic survey in geotechnical site investigation scheme are described in detail.Quasi-elastic stiffness (QES) in shear behaviour of geomaterials is discussed. Recent developments in measurement of QES of natural ground by a means of in-situ seismic survey, together with comparable measurement of elastic wave velocities in the laboratory are outlined. Application of combined in-situ/lab measurements is discussed with reference to the interlink between QES and strengths, the quality of laboratory sample and the in-situ 'structure' of natural sedimentary clay. Two case records, each demonstrating the importance of in-situ seismic survey are described : these are i)prediction of soft clay ground deformation associated with deep excavation in Bangkok Metro project, and ii)geotechnical site investigation performed at leaning tower of Pisa in September 2003.