Komparasi Kuat Dukung Tiang Pancang Menggunakan Beberapa Metode Dinamik dan Metode Statis Terhadap Hasil PDA Test Pada Pembangunan Masjid Raya Provinsi Riau

Nurhazizah, Putri (2020) Komparasi Kuat Dukung Tiang Pancang Menggunakan Beberapa Metode Dinamik dan Metode Statis Terhadap Hasil PDA Test Pada Pembangunan Masjid Raya Provinsi Riau. Other thesis, Universitas Islam Riau.

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Abstract

The Grand Mosque of Riau Province uses a mini pile foundation with a diameter 0f 25 cm, K-450 concrete. Have a problem formulation knowing how the results of the comparison the bearing capacity of the pile using three method (using static, dynamic and 2D finite element methods) the results of field tests or the PDA test. The purpose of this studies are determine the bearing capacity of the pile and the settlement that occurs, the safety factor that will be obtained from the methods used, and to compare the results obtained with the results of field tests or the PDA test. In analyzing the workload on buildings the calculation using ETABS software. T he calculation of the bearing capacity of piles is carried out using static, dynamic and 2D finite element methods. Analysis on the static method was carried out using the analysis of the bearing strength capacity of a single pile foundation with the Schmertmann and Nottingham method and the deRuiter and Beringen; the Mayerhof and deRuiter and Beringen; and the end Bearing and Friction Pile method. Analysis of the dynamic method in this study was carried out using the Hiley Formula, Denmark, Eytelwein, Janbu, News-Record, ASSHTO, Nacy-Mickay, Pacific Coast Uniform Building Code (PCUBS), and the Gates method, and 2D axysimmetry finite element method with interface. Furthermore, the analysis of the reduction was carried out using the Poulus and Davus methods and the 2D axysimmetry finite element method using PLAXIS software. From the above analysis, obtained a test comparison in accordance of the PDA test As C7 test point, pile No. 1 17 m depth, in the static method the bearing strength value obtained from all methods can be obtained the the one using 2D finite elements which is the smaller difference, namely using the end Bearing and Friction Pile method (Sardjono HS, 1984), with the difference in the carrying strength value of 1.19% 1,046 kN> 1,251 kN, for the 2D finite element method the bearing strength value is smaller than end Bearing and Friction Pile method 457 kN <1.251 kN. If using a dynamic method that is close to the PDA test value, namely using the Danish equation (Olson and Flate (1967)) with a bearing strength value of 1.261 kN, 1.261 kN ≈ 1.251 kN a difference of 1%, for the 2D finite element method the carrying strength value is smaller than the strength value support 2D finite element method 457 kN <1,251 kN. The comparisons obtained for the carrying strength value against the PDA test result, the carrying strength value which is close to the carrying strength value of the PDA test, is using the dynamic method. The safety factor obtained from the dynamic method is 2.47 while with other methods the safety factor obtained is greater than the PDA test. The decrease that approximates the decrease in PDA test is by using the 2D finite element method ranging from 1.37 mm to 2.72 mm. The stake is safe against strong bearing and dropping. The safety factor obtained from the dynamics method was 2.47 while from other methods, the safety factor obtained was greater than the PDA test. The settlement that approximates to the settlement in PDA test was the one using 2D finite elements, which is in the range of 1.27 mm - 2.72 mm. The pile of foundation was concluded to be safe against bearing and settlement.

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