ABSTRACT
The flood that occurred in the Sampang area was caused by the low capacity of the Kemuning River. One of the possible methods to solve flood overflow is to increase the capacity using normalization, by dredging sediments in the river channel. To carry out normalization, it is necessary to consider the impact on the stability of the existing CCSP (Corrugated Concrete Sheet Pile) embankment. This study is intended to analyze the impact of normalization against the stability of the CCSP embankment in 500 m long using the finite ele-ment method (FEM) program. This study consisted of several stages, namely soil data analysis, lateral pile analysis, and safety factor analysis. Based on the calculation results, all stationing segment is safe for normalization because they have an faktor keamanan (SF) value above the SF limit required by SNI 8460: 2017, that is (SF=1.5) under normal conditions and (SF=1.1) under earthquake conditions. Likewise, when normalization is carried out at the depth limit of the river bed elevation, the CCSP embankment still meets the stability requirements with an average SF value in earthquake conditions of SF=1.27 and SF=2.46 in non-earthquake conditions. The stability of the CCSP reaches its limit when the average dredging depth elevation is 4.71 m and 5.92 m below the river's normal water level in earthquake and non-earthquake conditions.
