The Use of CPTU and DMT Methods to Determine Soil Deformation Moduli—Perspectives and Limitations

IF 0.7 Q4 MECHANICS
Z. Młynarek, J. Wierzbicki, T. Lunne
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引用次数: 0

Abstract

Abstract The article presents the concept of determining constrained modulus— M 0 , initial shear modulus— G 0 , Young modulus— E , and rigidity index— I R on the basis of parameters from static penetration tests CPTU (Piezocone Penetration Testing), SCPTU (Seismic Piezocone Penetration Testing) and dilatometer tests DMT (Flat Dilatometer Test), SDMT (Seismic Flat Dilatometer Test). The basis for constructing the empirical relationships between the mentioned modules and parameters from the CPTU and DMT studies was to determine the factors that affect these relationships. The article discusses the impact of the following factors; geological and geotechnical conditions, conditions of recording measurements in CPTU and DMT tests, factors relating to the CPTU and DMT testing methods, factors affecting reference parameters from laboratory tests, factors related to subsoil properties. The basis for obtaining the empirical relationships for determining the analyzed modules and rigidity index were extensive research of the soils of various origins, in Poland. Measurement uncertainties and factors influencing the recorded parameters in the CPTU study were documented by the studies of the Norwegian Geotechnical Institute and the former Department of Geotechnics of the Agricultural University in Poznań. In these studies, penetrometers from several reputable manufacturers were used. The article summarizes the established empirical relationships for individual modules, taking into account the effect of overconsolidation. It also comments on the interrelationship between constrained modulus M 0 from CPTU and DMT test for soils in Poland.
使用CPTU和DMT方法确定土壤变形模量-前景和局限性
摘要本文提出了根据静力侵彻试验CPTU(压电锥侵彻试验)、地震压电锥侵彻试验SCPTU(地震压电锥侵彻试验)和膨胀试验DMT(平面膨胀试验)、SDMT(地震平面膨胀试验)的参数确定约束模量m0、初始剪切模量g0、杨氏模量E和刚度指数I R的概念。从CPTU和DMT研究中构建上述模块与参数之间的经验关系的基础是确定影响这些关系的因素。本文讨论了以下因素的影响;地质和岩土条件、CPTU和DMT测试中记录测量的条件、与CPTU和DMT测试方法有关的因素、影响实验室测试参考参数的因素、与底土性质有关的因素。获得用于确定分析模块和刚度指数的经验关系的基础是对波兰各种来源的土壤的广泛研究。测量不确定度和影响CPTU研究中记录参数的因素由挪威岩土研究所和波兹纳斯农业大学前岩土工程系的研究记录。在这些研究中,使用了几家信誉良好的制造商的穿透计。本文在考虑过固结效应的情况下,总结了各个模块已建立的经验关系。对波兰土壤CPTU约束模量m0与DMT试验的相互关系进行了评述。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.30
自引率
16.70%
发文量
20
审稿时长
16 weeks
期刊介绍: An international journal ‘Studia Geotechnica et Mechanica’ covers new developments in the broad areas of geomechanics as well as structural mechanics. The journal welcomes contributions dealing with original theoretical, numerical as well as experimental work. The following topics are of special interest: Constitutive relations for geomaterials (soils, rocks, concrete, etc.) Modeling of mechanical behaviour of heterogeneous materials at different scales Analysis of coupled thermo-hydro-chemo-mechanical problems Modeling of instabilities and localized deformation Experimental investigations of material properties at different scales Numerical algorithms: formulation and performance Application of numerical techniques to analysis of problems involving foundations, underground structures, slopes and embankment Risk and reliability analysis Analysis of concrete and masonry structures Modeling of case histories
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