STUDI EVALUASI PONDASI TIANG PANCANG (SPUN PILE) DENGAN PONDASI TIANG BOR (BORED PILE) PADA GEDUNG KANTOR PEMERINTAH KABUPATEN LAMONGAN

Abstract

Foundation planning must be done carefully and correctly. The planning of this foundation aims to compare the axial forces acting with the carrying capacity of the foundation between the original foundation that spooked the spune pile and bored pile on the construction of the Lamongan Regency Government office building to obtain safe control. The carrying capacity of the foundation is planned to use Standard Penetration Test (SPT) data. The initial calculation of loading analysis includes dead load, live load and earthquake. These expenses are combined then analyzed with the Staad.Pro program. The reduction calculation uses a method of reduction in clay. Calculation of pile cap and foundation reinforcement using SNI 1726-2012. The output of the Staad.Pro program is obtained axial force in the column that is reviewed at 1260 kN. Carrying capacity of a single pole pole diameter of 40 cm with a depth of 20 m obtained compressive strength of 431.49 kN. Taking into account the efficiency figures obtained group carrying capacity (Qg) of 1715.52 kN> 1260 kN, so that it meets the requirements. The flexural reinforcement D16-125 mm is planned to hold the moment in the pile cap which occurs at 211.6 kN-m. The decrease in total (St) is the immediate total decrease (Si) and the decrease in consolidation (Sc) which is 1.673 <15 cm. The decrease in total (St) on the group pole meets the permitted conditions for the building based on the Geotechnical RSNI.