Analysis Rock Mass Rating (RMR) Elevation Inlet Diversion Tunel Luewikeris

Abstract

Leuwikeris Dam Project located in Handapherang Village, Cijeungjing District, Ciamis Regency, West Java Province is one of the dam projects built on volcanic sediment rocks including in the Old Volcanoes Formation. Limit Equilibrium Method (LEM), is a method used to find the Rock Mass Rating (RMR) value in each elevation on the slope of the Dodge Tunnel Inlet. Based on the analysis, the result of its RMR value at the elevation of 130 meters has rock mass class is II (Good), elevation of 140 meters has rock mass class is II (Good), elevation of 145 meters has rock mass class is III (Medium rock), and elevation 157 meters have a class of rock mass is III (Medium rocks).