Analisis Kapasitas Daya Dukung Pondasi Bored Pile dengan Metode Empiris, Metode Dinamis, dan Software Plaxis pada Jembatan STA 4+575 Proyek Pembangunan Jalan Lintas Selatan (JLS) Lot 6A: P. Sine – Bts. Kab. Blitar 1

Analysis Bearing Capacity of Bored Pile Foundation by Empirical Method, Dynamic Method, and Plaxis Software at Bridge STA 4+575 Of South Cross Road Construction Project (JLS) Lot 6A: P. Sine – Bts. Kab. Blitar 1

Jembatan STA 4+575 merupakan salah satu kontruksi proyek Jalan Lintas Selatan (JLS) Lot 6A dengan tipe pondasi bored pile. Rancangan konstruksi pondasi bored pile dihitung menggunakan perhitungan metode empiris untuk memperoleh besaran beban pondasi. Uji dinamis Pile Driving Analyzer (PDA) di lapangan dan pemodelan software Plaxis menjadi pilihan untuk memperoleh hasil kapasitas daya dukung pondasi. Penelitian ini bertujuan mengetahui hasil dan analisis perbandingan kapasitas daya dukung pondasi bored pile hasil data N-SPT dengan metode empiris berdasarkan teori Mayerhoff (1976), Reese and Wright (1977), dan Luciano Decourt (1987), metode dinamis uji Pile Driving Analyzer (PDA), dan software Plaxis. Perhitungan analisis kapasitas daya dukung izin (Qall) pondasi bored pile menghasilkan besaran dengan metode empiris teori Mayerhoff sebesar 304,04 ton, Reese and Wright sebesar 275,608 ton, Luciano Decourt sebesar 152,608 ton. Metode dinamis uji PDA sebesar 176,7 ton, dan hasil software Plaxis sebesar 165,38 ton. Selisih persentase ketiga metode yaitu uji PDA-metode empiris Mayerhoff sebesar 41,88%, uji PDA-metode empiris Reese and Wright sebesar 35,89%, uji PDA-metode empiris Luciano Decourt sebesar 15,61%, dan uji PDA-software Plaxis sebesar 6,41%. Hasil dari ketiga metode menyatakan bahwa metode empiris Luciano Decourt paling mendekati dengan metode dinamis uji PDA.

Kata kunci: Kapasitas Daya Dukung Pondasi Bored Pile, Software Plaxis, Uji PDA

The STA 4+575 bridge is one of the constructions in the Lot 6A South Cross Road (JLS) project with a bored pile foundation type. The construction design of a bored pile foundation is calculated using an empirical method to obtain the bearing capacity of the foundation. Pile Driving Analyzer (PDA) dynamic test in the field and Plaxis software modelling are the options to analyze the bearing capacity of the foundation. This research aims to identify the results and comparative analysis of the bearing capacity of bored pile foundations using           N-SPT data based on empirical methods theories of Mayerhoff (1976), Reese and Wright (1977), and Luciano Decourt (1987), the dynamic method using the Pile Driving Analyzer (PDA) test, and Plaxis software. The Qall results of the bored pile foundation empirical method theories of Mayerhoff are 304.04 tons, Reese and Wright are 275.608 tons, and Luciano Decourt are 152.608 tons. The dynamic method of PDA test result is 176.7 tons, and the Plaxis software result is 165.38 tons. The percentage differences of the three methods are the Mayerhoff’s theori-PDA test of 41.88%, Reese and Wright’s theori-PDA test of 35.89%, Luciano Decourt’s theori-PDA test of 15.61%, and the PDA test-Plaxis software of 6.41%. The results of the three methods suggest that the empirical method of Luciano Decourt is closest to the dynamic method of the PDA test.

Keywords: Bearing Capacity of Bored Pile Foundation, PDA Test, Plaxis Software