Perlindungan Tebing Sungai Ciliwung dengan Dinding Kantilever Ruas Kampung Legok Nyenang, Kabupaten Bogor

Abstract

Riverbanks as areas prone to erosion caused by water flow. Continuous erosion causes landslides. In general, soil types in Bogor Regency are dominated by latosols which are easily eroded, apart from that it is due to high rainfall and also increases the risk of landslides. One of them is a landslide incident on the cliffs of the Ciliwung River on the section of Legok Nyenang RT.01 / 03, Leuwimalang Village, Cisarua District. The length of the landslide reached 27 meters with a height up to 10.20 meters. The structure of the retaining wall is needed to prevent more extensive landslides. Considering the slope conditions and physical parameters of the soil, a cantilever type retaining wall is chosen for this area. The results of the analysis Mononobe-Okabe method show that the safety value of the retaining wall against shear is 0.36, and against rolling is 0.21, lower than safety factor required, which is 1.5, thus the retaining wall is not strong enough to withstand the lateral earth pressure. Therefore, the strength of the walls is completely transferred to the subgrade, using a bored pile foundation. The results of the soil bearing capacity analysis showed that the ultimate safe capacity (qs) value was 223.93 kN/m2 which was greater than the total vertical load value, which was 204.52 kN/m2, while the permitted capacity of one foundation reached 569.89 kN.