2D Physical Model Of The Sheet-Pile Building Of The Komering River At Sugih Waras Village, Ogan Komering Ilir Regency

Yogi Adinata Adinata, Achmad Syarifudin


Abstract— The conditions on the slopes of Komering river have a soft soil layer (back fill) and less strong soil reinforcement with a depth ranging from 20 m to 25 m, with the presence of a soil layer like this, plus a soil reinforcement that is less supportive to withstand the loads that are above it, so if there is a disturbance or the maximum load occurs on the slope soil surface, it will cause landslides.This study aims to draw and produce how much erosion and sedimentation that occurs in the river bends with sheet-pile with a physical model approach in the laboratory and dimensional analysis using the Langhaar method.The results of the study, the depth of erosion around the sheet-pile building with a relative erosion (ds/t) of 0.068. This means that there is an increase in the depth of erosion within 15 minutes of 1.02 cm in the model or with a scale in the field of 1:100, there is an erosion depth of 1.02 m. When the experiment lasted for 30 minutes, it was seen that the maximal relative sedimentation (ds/t) of 0.02 occurred at a relative speed (v/t) of 0.0012. This means that the sediment accumulation that occurs around the sheet-pile building in the model within 30 minutes is 0.6 cm or on a 1:100 scale in the prototype there will be sedimentation of 0.6 m.


Keywords: river cliffs, dimensional analysis, Langhaar method, erosion and Sedimentation

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DOI: http://dx.doi.org/10.52155/ijpsat.v31.2.4146


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