Analisis Daya Dukung dan Penurunan Bored Pile (Diameter 1,2) dengan Metode Analitis dan Metode Elemen Hingga (Studi Kasus Pembangunan Jalur Kereta Api Medan-Binjai BH-49)

Abstract

In the construction of the Medan-Binjai railway, the construction consists of the upper structure and lower structure. In this project work, a type of deep foundation is used, namely bored pile. This study aims to find the analytical axial bearing capacity of the bored pile foundation based on SPT (Standard Penetration Test) data using the Reese and Wright method using the finite element method with the help of Plaxis 2D software. And also analyze the lateral bearing capacity using the Brooms method, the ultimate bearing capacity of the bored pile with PDA (Pile Driven Analysis) test data, the decrease in elasticity in single and group piles. From the calculations carried out on the bored pile foundation with a diameter of 1.2 m and a depth of 38 m at bore hole - 49. From the results of the PDA (Pile Driven Analysis) Test, the ultimate bearing capacity at a depth of 38 m is 975 tons. The calculation results with PLAXIS 2D software are 1,322.79 tons at a depth of 38 m. Lateral bearing capacity based on the Brooms Method on bore hole – 49 analytically is 56.1 tons and graphically is 51.93 tons. The resulting single elastic settlement is 4.69 mm. The settlement with PLAXIS 2D software is 11 mm. The settlement of the pile group is 8.16 mm. Differences in bearing capacity and settlement values can differ due to the depth reviewed, testing methods, parameters, and safety factors used.