Analisis Daya Dukung Pondasi pada Tiang Pancang Sta 10+776 menggunakan Metode Analitis dan Metode Elemen Hingga Pada Bore Hole 14r (Studi Kasus Proyek Jalan Tol Ruas Binjai – Langsa, Seksi Binjai – Pangkalan Brandan

Abstract

The foundation is the lower structure of the building which functions to support the load of the structure above it, and must be strong, sturdy and safe to be able to carry the load of the structure above and its own weight. In The Toll Road Development Project Section Binjai-Langsa, Section Binjai-Pangkalan Brandan STA 10+776 several stages of research were carried out such as reviewing the project location, collecting field data from consultants or contractors, while several other things were carried out such as collecting some related literature so as to enable the results of the analysis and development of more accurate information. The ultimate axial bearing capacity of a single pile with a diameter of 60 cm at bore hole 14R at a depth of 18 m is obtained from: Based on SPT data using the Meyerhof method was 586.725 tonnes, based on Calendering data using the Hiley method, namely 606.85 tonnes, using the Danish method yielded 1,053.7 tonnes, and using the ENR method obtained 1,917.51 tonnes, while based on the Finite Element Method with the program PLAXIS 8.6 and Mohr-Coloumb modeling yielded 388,427 tonnes. The ultimate lateral bearing capacity of the foundation using the Broms Method is analytically 58.28 tons and graphically 62.228 tons and these values are not much different. The efficiency value of the pile group is obtained from the Converse-Labarre method, which is 0.591. The elastic settlement of a single pile was 24.92 mm, the settlement of the pile with the Poulos and Davis (end bearing) method was 4.17 mm, and the settlement with the Finite Element Method of the PLAXIS V.8.6 program was 1.79 mm due to a load of 165 tons. The large difference in carrying capacity obtained from various methods can be caused by differences in test points and depth so that the types and properties of the soil studied are also different, and the method of carrying out tests in the field is less through (human error), as well as differences in the parameters used in each method, calculation. The value of the ultimate bearing capacity of the foundation based on the results of the SPT, and calendaring (Janbu Method), and the Finite Element Method from the PLAXIS Program are not much different, so they can be used as a comparison.