Evaluation of the Performance of Reinforced Red Coffee Soils Embankments Subject to Rainfall Event

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dc.contributor.author Zimbu, Salim A.
dc.contributor.author Thuo, Joseph N.
dc.contributor.author Ambassah, Nathaniel
dc.date.accessioned 2018-12-04T06:27:46Z
dc.date.available 2018-12-04T06:27:46Z
dc.date.issued 2018-10-07
dc.identifier.citation 10.28991/cej-03091180 en_US
dc.description.abstract Infrastructure development in Kenya has led to the need for alternative material in slopes and embankments construction. Sourcing of recommended cohesionless material often leads to the destruction of the environmental features such as rivers and involves high extraction and transportation costs. The need for alternative material is the motivation behind this study. The study aims to evaluate the potential of Red coffee soils of Kenya as a backfill material in the construction of slopes and embankments. Provision of sand cushion layers to sandwich non-woven geotextile material has been suggested to overcome the water drainage and stability problems that have been associated with these soils. The study first involved identifying the properties of both the Red coffee soils (RCS) and the river sand that is to aid in drainage. Numerical model SEEP/W was used in evaluating the effect of geotextile inclination on the performance of RCS embankments before the effect of introducing sand cushions of different thickness evaluated. The numerical results revealed that the stability of reinforced RCS decreased with increase in pore water pressure in the embankments due to rainfall infiltration. Provision of sand cushion layers helped improve both the local and global stabilities of the RCS subjected to rainfall infiltration. The results showed that 150mm sand cushion layer was adequate to improve the performance of RCS embankments and reduced the sand consumption in the construction of embankments to 15%. en_US
dc.language.iso en en_US
dc.publisher Civil Engineering Journal en_US
dc.relation.ispartofseries Volume 4;Issue paper 11
dc.subject Embankments; Non-Woven Geotextile; Red Coffee Soils; Sand Cushion; Slope Stability. en_US
dc.title Evaluation of the Performance of Reinforced Red Coffee Soils Embankments Subject to Rainfall Event en_US
dc.type Article en_US

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