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

• Autorzy: Młynarek Z. , Wierzbicki J. , Lunne T.

Identyfikatory

DOI

10.2478/sgem-2023-0021

• Konferencja: 19th KKMGiIG
• Języki publikacji: EN

Abstrakty

EN

The article presents the concept of determining constrained modulus—M₀, initial shear modulus—G₀, 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 over consolidation. It also comments on the interrelationship between constrained modulus M₀ from CPTU and DMT test for soils in Poland.

Słowa kluczowe

EN

CPTU; piezocone penetration testing; DMT; flat dilatometer test; deformation moduli

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2023
• Tom: Vol. 45, nr s1
• Strony: 304--332
• Opis fizyczny: Bibliogr. 79 poz., rys., tab.

Twórcy

autor

Młynarek Z.

• Poznań University of Life Sciences, Poland

autor

Wierzbicki J.

• Institute of Geology, Adam Mickiewicz University, Poznan, Poland

autor

Lunne T.

• Norwegian Geotechnical Institute, Oslo, Norway

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