Foundation modelling for cooling water pump machine in PT Pupuk Sriwijaya (PURSI) II-B projects

Abstract

PT Pupuk Sriwijaya (PUSRI) in Palembang, South Sumatera, Indonesia uses a lot of machines to run the fabric. One of the project is PUSRI II-B, which use cooling water pump machine. The machine will not operate properly if it does not use the appropriate foundation to support static and dynamic loads. The Terzaghi and Meyerhof methods were used in static analysis to measure the settlement in the pile group and soil bearing capacity. The frequency, damping, and vibration amplitude of the vibration that occur in a vertical and horizontal vibration, and the vibration rocking were calculated by using the trial error method for dynamic analysis. Modelling frame foundation machine is the main focus in this research. The result shows that the most effective foundation dimension for cooling water pump machine is frame foundation type with the pile cap dimensions of 9.8 m × 4 m × 1.5 m; column of 0.5 m × 0.5 m × 1 m and slab of 9.8 m × 4 m × 0.3 m, and using the piles with a diameter of 0.35 m, length of 21 m and the spacing between the piles is about 2.45 m. The gravel was compacted to the same level where the pile cap was planned in order to increase the soil shear modulus.