Fatimah, Fatimah (2025) Analisis Stabilitas Abutment Sisi Rantau Kasih Jembatan Rangka Baja Rantau Kasih Kabupaten Kampar. Other thesis, Universitas Islam Riau.

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Abstract

In constructing infrastructure such as bridges, there are many factors that must be considered, one of which is the foundation. A strong foundation is essential for creating a sturdy structure, as it must be capable of supporting all the loads acting upon it and transferring them to the hard soil layer beneath. One common issue often encountered with foundations is the weak bearing capacity of the soil, which can lead to excessive and uneven settlement. This condition may ultimately result in the failure of the bridge structure. Therefore, the objective of this study is to analyze the axial and lateral bearing capacity of pile foundations both analytically and numerically, then compare the results with PDA test data, and also to assess the stability of Abutment 2 (Rantau Kasih side). The data used in this study include SPT, CPT, and PDA test results. The methods employed involve calculating the axial bearing capacity of a single pile based on SPT data using the Luciano Decourt method, CPT data using the Aoki & De Alencar method, and MEH 2D. Lateral bearing capacity is analyzed using the Broms method and MEH 2D. The bearing capacity of pile groups is evaluated using the Converse-Labarre formula, while pile settlement, deflection, and slope stability are assessed using MEH 2D. The analysis results show that the axial bearing capacity obtained from the Luciano Decourt method is 9432.92 kN, Aoki and De Alencar method is 4492.17 kN, and MEH 2D is 3236.81 kN. The lateral bearing capacity using the Broms method is 3306.08 kN and MEH 2D is 2962.80 kN. For pile group capacity, the Luciano Decourt method yields 113,761.02 kN and the Aoki & De Alencar method gives 54,175.57 kN. MEH 2D analysis shows a pile settlement of 0.05277 cm, a pile deflection of 1.195 cm, and a slope safety factor of 7.059. Based on the analysis, the pile foundation is capable of supporting an axial load of 586.82 kN and a lateral load of 419.72 kN. The settlement, deflection, and slope stability values xviii remain within the permissible limits, where the allowable settlement is 15.667 cm, allowable deflection is 20 cm, and the minimum slope safety factor is 1.5.

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