Modeling Local Scour Characteristics on The Batujajar Bridge Pillar Using HEC-RAS Software
- 10.2991/aer.k.201221.049How to use a DOI?
- HEC-RAS, live-bed scour, pillar, Batujajar bridge
The bridge collapse is often the result of scouring. The potential for flooding can increase riverbed degradation and local scouring, which adds to the bridge threat sub-structures. Batujajar Bridge, located in Batujajar District, West Bandung Regency, has two pillars within the Citarum river. The 150 m long bridge is at risk of collapse due to local scouring of the pillars. So it’s necessary to evaluate the depth of the scours with mathematical modeling using the HEC-RAS application in live-bed scour conditions. In general, scour modeling is obtained by modeling river geometry, bridge design, and river flow. Scour modeling used the CSU method and the Froechlich method in the HEC-RAS 5.0.7 application. Topographical conditions were obtained from the DEM of the study area using Global Mapper 2.0 software and river geometry modeling using RAS Mapper. Discharge data is used for steady flow modeling and hydrograph data for unsteady flow modeling from the Upper Citarum Watershed and Cimahi Sub Watershed. The bridge design used existing data. Index properties (grain size analysis, specific gravity test, and soil content weight test) were tested at the Bandung State Polytechnic Soil Testing Laboratory from soil samples around the existing Batujajar bridge’s pillars. The hydraulic simulation shows that the scour depth reaches 1.89 m, affecting the bridge stability. So, scour protection is required. The scouring depth of the live bed can be used as a parameter for handling bridges in the dry and rainy seasons.
- © 2020, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Nita Widia Khairinnisa Rustawa AU - Bambang Setio Budianto AU - Djuwadi PY - 2020 DA - 2020/12/22 TI - Modeling Local Scour Characteristics on The Batujajar Bridge Pillar Using HEC-RAS Software BT - Proceedings of the International Seminar of Science and Applied Technology (ISSAT 2020) PB - Atlantis Press SP - 290 EP - 295 SN - 2352-5401 UR - https://doi.org/10.2991/aer.k.201221.049 DO - 10.2991/aer.k.201221.049 ID - Rustawa2020 ER -