REMBESAN AIR PADA MODEL BENDUNGAN URUGAN TANAH DENGAN VARIASI TINGGI HIDROSTATIS

Nurnawaty, Nurnawaty and Abd., Rakhim (2018) REMBESAN AIR PADA MODEL BENDUNGAN URUGAN TANAH DENGAN VARIASI TINGGI HIDROSTATIS. PROSIDING SNTT-VI (SEMINAR NASIONAL TEKNOLOGI TERAPAN). ISSN 2339-028x

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Abstract

A dam Urugan type’s is a construction structure built to withstand water rates from upstream to downstream. One of the problems with the dam is the seepage. Seepage is defined as the nature of the porous material that allows liquid in the form of water or oil to flow through the pore cavity. The purpose of this study is to determine the effect of hydrostatic high variation on seepage that occurs in dam body. This research was conducted dam model experimentally in laboratory with material of the body dam is a type of organic clay soil. This study looks at seepage patterns and seepage discharge against high hydrostatic variations. The seepage discharge (Qf) is calculated using 3 methods of Dupuit method, Schaffernak method, and Cassagrande method. The hydrostatic high variations studied were H10, H15, and H20. In the Cassagrande method showing the highest discharge for H10 and H15, the seepage pattern is not significant, because the seepage time is very slowly, the resutls seepage discharge is very small. While on hydrostatic high H20 Schaffernak method showed the highest discharge. In contrast to the high variation of H20 seepage pattern that occurs very significant, because the time of seepage is very fast, resulting in the resulting seepage discharge is very large.

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