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IJSTR >> Volume 8 - Issue 8, August 2019 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Evaluation Of Seepage Discharge On Jatibarang Dam Based On Instrumentation Data Monitoring

[Full Text]

 

AUTHOR(S)

Siswanto, Suprapto

 

KEYWORDS

Seepage, Instruments, Piezometer, V-Notch, Rockfill Dam

 

ABSTRACT

More than 90% of dams in Indonesia are fill type dams (rocks and soil). Rockfill dam has better stability than the homogeneous soil dam. So that it is possible to be made leaner in volume. The disadvantage of rockfill dam lies in the core zone which functions as an impermeable zone. Fill type dam failures are usually caused by: seepage, piping, overtopping, hidraulic failure and structural failure. At the fill type dam seepage occupy the first ranks towards the risk of failure. Dam failure is statistically potentially large happened in the first 5 years since impounding. Geotechnical design and engineering is a major challenge due to the many influential factors. Rock fill dam with zonal core is a combination of various material properties. Geometry and drainage design will affect the seepage and phreatic line properties that occur. So it is not easy to make an analysis of seepage with these limitations. Based on the evaluation of the instrument since the impounding period of May 2014 to November 2018, data was obtained that seepage discharge was 648,864 liters/day. The discharge is still below the maximum allowable limit. So it can be assumed that the body of the Jatibarang dam is safe towards seepage that occurs.

 

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