Assessment and verification of correlations in CPTu testing on the example of soil from the Wroclaw surroundings (Poland)

• Autorzy: Tankiewicz Matylda , Bagińska Irena

Identyfikatory

DOI

10.24425/ams.2021.137464

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of a series of Cone Penetration Test CPTu performed near the city of Wroclaw (Poland). The tests were carried out in 13 testing points located in close distance to each other. To verify the results of the penetration tests, fine-grained soil samples from selected depths were taken for laboratory tests. The study focuses on the evaluation of soil type, unit weight, and undrained shear strength cu, and compression index Cc. The grain size distribution of the soil and its mechanical parameters on the basis of a uniaxial compression and an oedometer tests were estimated. A comparison of laboratory and CPTu for selected values is presented. Determination of soil type was carried out on the basis of ISBT and IC values and good agreement with the granulometric composition was found. For undrained shear strength, commonly used correlations based on Nk, Nkt and Nke were adopted. However, the values obtained from the CPT are significantly lower than the results from laboratory tests. Therefore, values of cone factors suitable for investigated soil type and reference test were proposed. In the case of the compression index, the coefficient values βc and αm obtained agreed with those available in the literature. The findings presented in the paper indicate that laboratory tests remain necessary to identify soil properties from CPTu. The presented results are also a contribution to the knowledge of local soil conditions in the Lower Silesia area (Poland).

Słowa kluczowe

EN

cone penetration test; in situ testing; undrained shear strength; uniaxial compression; compression index; oedometer test

PL

wskaźnik ściśliwości; wytrzymałość na ścinanie; ściskanie jednoosiowe

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2021
• Tom: Vol. 66, no. 2
• Strony: 313--327
• Opis fizyczny: Bibliogr. 41 poz., rys., tab., wykr.

Twórcy

autor

Tankiewicz Matylda

• Wrocław University of Environmental and Life Sciences, 25 Norwida Str., 50-375 Wrocław, Poland

• https://orcid.org/0000-0003-3523-028X

autor

Bagińska Irena

• Wroclaw University of Science and Technology, 27 Wybrzeże Wyspiańskiego St., 50-370 Wrocław, Poland

• https://orcid.org/0000-0002-8481-5893

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)