PERENCANAAN STRUKTUR BAWAH PADA GEDUNG KANTOR WILAYAH BANK RAKYAT INDONESIA KOTA MALANG MENGGUNAKAN PONDASI TIANG PANCANG

Malang City is one of the cities in East Java which has a fairly dense population. This can lead to community demands in the fulfillment of living facilities and infrastructure, one of which is the construction of buildings for community services such as bank offices. Bank Rakyat Indonesia Regional Office Building is one of the branch offices located on Jalan Laksamana Martadinata No.80 which has a height of 46.4 m consisting of 11 floors, including 8 main floors along with 1 roof floor, and 2 basement floors as parking lots. Based on the structural analysis of the supporting application STAADPro V22, the largest axial force at the foot of column K-10 is 18400 KN. A spun pile with a diameter of 0.6 m is planned, with a bearing capacity of 2256.37 kN for a depth of 12.2m from the basement floor. Pile cap is planned for 4 types, where in the existing condition the largest type is type 1 with pile cap dimensions of 5.4 m x 8 m x 1.2 m with D28-75 mm main reinforcement, while shrinkage reinforcement uses ∅19-150 mm. The length of filler concrete is planned at 950 mm with 14-D19 longitudinal reinforcement and ∅10-60 mm spiral reinforcement. The largest settlement occurred in pile cap type 1 of 0.8 cm.