REINFORCEMENT DESIGN OF RIVER SLOPE AND MORPHOLOGY ALONG WITH FLOOD WATER ANALYSIS FROM RAILWAY BRIDGE SECTION KAYU TANAM–BATU TABAL–PADANG PANJANG

• Main Author: SIAGIAN , RIKARDY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30488
• Institution: Institut Teknologi Bandung

On the railway line Section Batu Tabal-Padang Panjang–Kayu Tanam, there are 14 (fourteen) railway crossing bridges. From 1813 until 1925, this bridge was used for transportation of coal. However, in 2003, the transportation of coal passing through the bridge was stopped because of the depletion of coal stock. Therefore, bridge revitalization design is needed on the corridor. This bridge will be revitalized with a new function, i.e. loading passengers to get access to Minangkabau International Airport. The planning aspects reviewed in this final project are floodwater analysis, and river reinforcement design of slope and morphology. <br /> <br /> Floodwater analysis process begins with conducting hydrological analysis. Performing maximum daily average rainfall treatment using Thiessen Polygon Method, then conducted the analysis of maximum rainfall frequency using Gumbel Method. This data is then tested using two tests of the suitability of the distribution, Chi-Square and Smirnov Kolgomorov. Next step is calculating flood discharge by comparing Rational Method and HEC-HMS software. The last step is to interpret the flood discharge in the river cross section by comparing the Manning Equations and the calculation of HEC-RAS software in unsteady flow condition, until finally the freeboard is calculated and used in the bridge design. <br /> <br /> River morphological reinforcement is carried out to ensure that there is no displacement of the river channel at the bottom of the bridge. River slope strengthening is done to keep the river slopes from degradation due to water flow, which may affect the foundation of the bridge. The method used for reinforcing river morphology is Groundsill (SNI 2851-2015) and the method used for reinforcing the river slope is Retaining Wall (DAS M. Braja 8th edition).