ANALISIS PERBANDINGAN KAPASITAS DAYA DUKUNG PONDASI TIANG PANCANG BERDASARKAN PERHITUNGAN DAN UJI LAPANGAN PADA PROYEK PENGEMBANGAN KAMPUS POLITEKNIK NEGERI MADIUN

Polytechnic State of Madiun development project is the multi-storey building that consist of 4 floors with a 8450 m2 total building area. The project was originally planned to use a bored pile 23 m depth. Taking into consideration of implementation efficiency, the author compared the initial application planning between bored pile and spun pile. Static analysis used Autodesk Robot Structural Analysis Professional 2018 and the loading used PPIUG 1983. Soil data N-SPT point DB-3 was used as reference calculation. Implementation used Drop Hammer machine then cost estimation calculation used HSPK Madiun. From the analysis result, it was found that the largest combination load was column 11 (Portal G A 11) and column 12 (Portal G As 12) with the 485.188,48 kg LRFD combination load and 380307,72 kg ASD combination load. The bearing capacity of spun pile was 130,025 ton while bearing capacity group was 589,887 ton with the decrease of total foundation was 8,880 cm. It needed Rp. 9.390.264.961. Different from spun pile, the bearing capacity of bored pile was 139,229 ton while bearing capacity group was 595,792 ton with the decrease of total foundation was 9,464 cm. It costed Rp. 15.248.960.510. Furthermore, based on bearing capacity calculation, implementation, and cost, Spun pile was the most efficient and lowest cost.