Numerical Analysis of Seepage in the Bener Dam, Purworejo Regency, Central Java
- DOI
- 10.2991/978-94-6463-086-2_91How to use a DOI?
- Keywords
- Seepage; Numerical Analysis; Embankment dam; Steady state; Rapid Drawdown
- ABSTRACT
The earth-fill and rock-fill dam are designed to be used for long-term storage, hydropower, flood control structure. The dam is set to design against failure due to various causes that can result in releasing the water catastrophically to the downstream area as a flood hazard. The consequences of the dam's failure can damage the downstream area infrastructure, properties, and loss of life. One of the main reasons causing the sliding or failure of the body dam is the seepage. The most critical issue induced by seepage is piping, which is internal erosion due to water movement inside the dam's body, which leads to dam structure failure. In terms of piping, dissolution, erosion, and uplift pressure prevention, the design of the dam must impose limitations on the allowable quantity of seepage. The seepage monitoring and control is a significant factor to guarantee that the dam does not collapse. The objective of this study is to analyse the seepage rate which is running through the dam body of rock-fill dam that can affect the stability of the dam. The seepage analysis in this research is applied on the Bener dam, which is the rock-fill dam with the good quality andesitic breccia rock and fair quality andesitic breccia rock used as the shell and core. The research is conducted by computing the Phase2 software. The numerical analysis by Finite Element Method (FEM) is applied in the analysis with the shear strength reduction approach. In this analysis, two different cases of operation, steady-state seepage, and rapid drawdown, are considered. The rapid drawdown is divided into two stages which are the 10 days with a total head of 80 m, and 15 days with the total head of 50 m. As a result, the total seepage through the dam body is 0.00014 m3/s for the steady-state seepage condition. Whilst the rapid drawdown condition after 10 days, 15 days have the total seepage through the dam body 0.00009 m3/s, 0.000007 m3/s, respectively. The strength reduction factor (SRF) for each stage is 3.11, 3.13, and 3.12, respectively. The results from this analysis method indicate that the seepage rate through the dam body is acceptable and will not affect the stability of the dam in both the steady-state seepage and rapid drawdown conditions.
- Copyright
- © 2023 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - Thuon Ranysakol AU - Wawan Budianta AU - I Gde Budi Indrawan PY - 2022 DA - 2022/12/28 TI - Numerical Analysis of Seepage in the Bener Dam, Purworejo Regency, Central Java BT - Proceedings of the International Conference on Sustainable Environment, Agriculture and Tourism (ICOSEAT 2022) PB - Atlantis Press SP - 684 EP - 691 SN - 2468-5747 UR - https://doi.org/10.2991/978-94-6463-086-2_91 DO - 10.2991/978-94-6463-086-2_91 ID - Ranysakol2022 ER -