REDESIGN OF BORE PILE FOUNDATION FOR ITS SURABAYA TOWER 3 BUILDING
DOI:
https://doi.org/10.26740/rekats.v14n02.p..Keywords:
Soil Parameters, Bore Pile, Bearing Capacity, Settlement, Plaxis 2DAbstract
ITS Tower 3 Building is one of the high-rise buildings in Surabaya, which originally has 11 floors with a planned height of 39 meters. However, there was a change in the number of floors to 13 floors. Therefore, the planned load for the 13-floor building is 504.54 tons. The foundation of ITS Tower 3 was redesigned using bored piles with the same specifications as the previous foundation, in the form of Ø60 spun piles with a depth of 30 m. Flexural reinforcement is planned using 12D19, while spiral reinforcement uses Ø 16-120. The planned bored pile concrete has a compressive strength of 30 MPa. This research was conducted to analyze the bearing capacity using the analytical method of Luciano Decourt, while the settlement analysis was carried out using the Vesic analytical method. The results of this study show that the bearing capacity obtained using the Luciano Decourt method is 490.94 tons, while using Plaxis 2D software it is 432.258 tons. The settlement value from the analytical method (Vesic method) is 3.5 cm, while using Plaxis 2D software it is 1.9 cm. The results of the bearing capacity and settlement analysis using Plaxis 2D software are smaller than those from the analytical method. This is due to the Plaxis 2D software parameters using a more diverse range of soil parameters compared to the analytical method. The cost required for the PC10 foundation is Rp 1,155,432,105.14.
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