Article (Scientific journals)
Laboratory Geotechnical Investigations on Five Silty Soils Sampled Along the Banks of the Lubumbashi River/Haut-Katanga/DR Congo
Kiyukeno Kitwanyoka, Yannick; Mukoko, Gustave; François, Bertrand
2023In International Journal of Engineering Research in Africa, 65, p. 73 - 89
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Keywords :
Alluvial soils; Direct shear test; Identification test; Oedometric compression test; Triaxial compression test; Alluvial soil; Geotechnical; Geotechnical investigations; Plasticity indices; Silty soils; Tri-axial compression tests; Triaxial compression tests; Engineering (all); General Earth and Planetary Sciences; General Environmental Science
Abstract :
[en] An adequate design of port structures along waterways requires a good knowledge of the geotechnical properties of the surrounding soils. This study aims to characterize the geotechnical laboratory properties of alluvial soils along the Lubumbashi river (section between the Tshombe and Tshondo bridges, approximately 3 km long) in the city of Lubumbashi, province of Haut Katanga in DR Congo. To meet this objective, five sampling zones were selected from which samples were taken with a hand auger and various geotechnical laboratory tests were performed. Identification tests reveal that the tested soils have low to moderate plasticity and are in the range of sandy silt to silty sand with a low fraction of clay particles, essentially inactive. Oedometric compression tests reveal that the soils in place are (moderately) compressible. The consolidated undrained (CU) triaxial compression and direct shear tests indicate effective values of internal friction angle and negligible drained cohesion that, are consistent for this kind of soil. In the end, the compressibility and strength parameters of the five tested soils are correlated with their plasticity index, showing a decrease in the shear strength and an increase in the compressibility when the plasticity index increase.
Disciplines :
Civil engineering
Author, co-author :
Kiyukeno Kitwanyoka, Yannick ;  Université de Liège - ULiège > Urban and Environmental Engineering
Mukoko, Gustave;  Université de Lubumbashi, Ecole supérieure des ingénieurs industriels, Département de géniecivil, RD, Congo
François, Bertrand  ;  Université de Liège - ULiège > Urban and Environmental Engineering
Language :
English
Title :
Laboratory Geotechnical Investigations on Five Silty Soils Sampled Along the Banks of the Lubumbashi River/Haut-Katanga/DR Congo
Publication date :
2023
Journal title :
International Journal of Engineering Research in Africa
ISSN :
1663-3571
eISSN :
1663-4144
Publisher :
Trans Tech Publications Ltd
Volume :
65
Pages :
73 - 89
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
The authors express their deep appreciation to Pierre Illing from the Geotechnology Laboratory ofthe University of Liege (Belgium), for its technical support in the development and the carrying out of the experiments.
Available on ORBi :
since 11 December 2023

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