The Menard pressuremeter test is a relatively expensive in situ test, which generates useful information about the strength and deformation properties of any soil and weak rock, which is carried out in some projects. On the other hand, the SPT test is a rather inexpensive, simple and typical in situ test used to determine the engineering properties of silt, clay, sand, and fine gravel which is utilised in almost all projects.
In this study SPT blow counts (N60) were correlated with pressuremeter modulus (EPMT) and limit pressure (PL) and empirical equations were proposed to estimate PL and EPMT from N60 in silty sand and silty clay soils separately. These tests have been conducted during subway geotechnical investigation in Mashhad, Iran.
Moreover, in order to verify these empirical equations, they were compared with similar equations that have been proposed by other researchers. These comparisons display that in all equations a linear relationship exists between N60 - EPMT and N60 - PL. However, the line slopes are different so it can be concluded the line slopes are related to soil type and geological condition of an area. Thus, for each area a separate empirical equation must be presented. 相似文献
As an open standard of data representation,XML breathes new energy to the Web application and the network computing.The development,advantage and status of XML and some standards relating to XML are reviewed.In addition,the authors put forward a method representing logging data and using UML language to establish the conceptual and logical model of logging data;using a logging data,explain how to establish the model as well as how to use XML to display and process geology data. 相似文献
Two alternative approaches for the depiction of the geographic distribution of diurnal precipitation patterns are presented. The standard deviation method results in a plot of significant peak precipitation hours for several locations along a transect. The correlation fields approach allows researchers to visualize geographic patterns significantly associated with a given diurnal precipitation distribution. These techniques may be applied to reveal changes in diurnal patterns over both space and time. 相似文献