Analisis Daya Dukung Aksial Bored Pile Ø 80 Cm dengan Menggunakan Uji Beban Statik dan Menggunakan Metode Elemen Hingga pada Proyek Menara BRI – Medan

Abstract

The high population in various large cities such as Medan City makes the development of buildings in this city increasingly rapid. This affects the need for piles on a building's foundation because the development of a building that has a vertical concept requires a strong foundation to accept the load from the upper structure. The foundations used in the city of Medan generally use bored pile foundations, because these foundations, which are classified as deep foundations, have a small vibration impact during construction and are suitable for use in densely populated areas. This really determines the bored pile foundation design that suits the project needs. One of the strategies that will be used for the problem in this research is by collecting data from the project such as soil data which will then be analyzed using the Reese and O'Neill method to obtain the bearing capacity value from the SPT test results and we will calculate the amount of settlement that occurs in the bored foundation. pile at point BH-2 of the BRI-Medan Tower project using analytical calculations and the finite element method using PLAXIS 2D and 3D software using Mohr-Coulomb and Hardening Soil types of soil. After the analysis, the ultimate bored pile carrying capacity value based on SPT data using the O'Neill and Reese equation is 565 tons, then analysis using the Davisson method is 410 tons, using the Mazurkiewiech method is 350 tons and the Chin method gives a carrying capacity of 344 tons. tons. And for the settlement value that occurs in the bored pile foundation at point BH-2, analytically the settlement is 3.80 mm, which we then compare using the FEM PLAXIS 2D Mohr- Coulomb program, the decline is 4.51 mm and the Hardening Soil decline is 3 .85 mm, as well as analysis based on FEM PLAXIS 3D Mohr-Coulomb decrease of 3.87 mm, and Hardening Soil decrease of 3.41 mm. Based on the results of the analysis, it can be concluded that the O'Neil and Reese equation provides a greater value than the interpretation of the loading test so that it will provide a large safety value if used during design and settlement analysis. The results in the field is the analysis with PLAXIS 3D with the Hardening Soil.