Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A Centrifuge Study on the Effects of Soil Gradation on CPT Tip Resistance
The cone penetration test (CPT) is routinely used when characterizing cohesionless soil deposits; however, there is limited understanding regarding its performance in soils with increasing coarse-grained content. A series of centrifuge tests on coarse-grained soil mixtures was conducted at the UC Davis Center for Geotechnical Modeling to study the effects of soil gradation on CPT tip resistance (qc). Four uniformly-graded soils with mean grain diameters (D50) ranging from 0.18 to 2.58 mm were used to construct three soil mixtures: two uniformly-graded and one well-graded. All soils are of alluvial origin and were not crushed during processing; thus, any variations in minerology or particle shape are consistent with natural deposition. CPT tip resistance was dependent on probe diameter (DCPT) and relative density (DR), with lower qc values typically occurring for the cone with the low DCPT at high DR. Additionally, CPT qc was not uniquely related to relative density. Both particle size and packing efficiency effects resulted in different tip resistance values for each soil mixture.
A Centrifuge Study on the Effects of Soil Gradation on CPT Tip Resistance
The cone penetration test (CPT) is routinely used when characterizing cohesionless soil deposits; however, there is limited understanding regarding its performance in soils with increasing coarse-grained content. A series of centrifuge tests on coarse-grained soil mixtures was conducted at the UC Davis Center for Geotechnical Modeling to study the effects of soil gradation on CPT tip resistance (qc). Four uniformly-graded soils with mean grain diameters (D50) ranging from 0.18 to 2.58 mm were used to construct three soil mixtures: two uniformly-graded and one well-graded. All soils are of alluvial origin and were not crushed during processing; thus, any variations in minerology or particle shape are consistent with natural deposition. CPT tip resistance was dependent on probe diameter (DCPT) and relative density (DR), with lower qc values typically occurring for the cone with the low DCPT at high DR. Additionally, CPT qc was not uniquely related to relative density. Both particle size and packing efficiency effects resulted in different tip resistance values for each soil mixture.
A Centrifuge Study on the Effects of Soil Gradation on CPT Tip Resistance
Sturm, Alexander P. (Autor:in) / Shepard, Gregory M. (Autor:in) / DeJong, Jason T. (Autor:in) / Wilson, Dan W. (Autor:in)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 100-109
21.03.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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