ABSTRAK Retaining wall is a construction that is built to hold land that has a slope or slope where the stability of the land cannot be guaranteed by the land itself. The building of retaining walls is used to hold lateral soil caused by topsoil or native soil which is labile due to topography. The purpose of this study was to find out efficiently the dimensions or size of the gravity retaining wall on the lambidaro river in the Lubuk Bakung area of Palembang City. So that it is stable against rolling forces, shear forces and bearing capacity. Calculation of soil pressure was calculated using the Coulomb and Rankine method and the calculation of soil bearing power pressure was calculated based on the Hansen and Vesic equations based on engineering characteristics data. The results of planning and calculation of retaining walls on the lambidaro river using soil data from laboratory tests obtained dimensions or sizes: Upper width 40 cm, Lower width 250 cm, 50 cm foundation height and overall wall height 350 cm. With that size it is efficient enough for retaining walls at the location of the Lambidaro river. So that it is stable against the rolling, shear and bearing capacity of the soil. iv
