Analisis Daya Dukung Spun Pile Pada Proyek Pembangunan Jalan Lingkar Luar Barat (JLLB) Surabaya

Bearing Capacity Analysis of Spun Pile Foundation in Jalan Lingkar Luar Barat (JLLB) Surabaya Construction Project

            Abstrak

        Pondasi merupakan salah satu konstruksi penting dalam sebuah bangunan. Pondasi sebagai struktur bawah sangat penting untuk dilakukan perhitungan analisis daya dukung agar tidak terjadi kegagalan struktur. Proyek pembangunan Jalan Lingkar Luar Barat (JLLB) menggunakan pondasi jenis tiang pancang spun pile. Analisis daya dukung pondasi dapat dilakukan dengan cara empiris, pengujian statis, dan pengujian dinamik. Pada penelitian ini, untuk menghitung analisis daya dukung spun pile menggunakan pengujian dinamik yaitu, Standard Penetration Test (SPT), Pile Driving Analysis (PDA), dan Kalendering. Daya dukung spun pile dari data SPT dihitung menggunakan metode Luciano Decourt, Tomlinson, dan US Army Corps. Daya dukung spun pile dari data Kalendering dihitung menggunakan metode Hiley, Engineering News Record (ENR), dan Olsen & Flaate, sedangkan pada pengujian PDA dilakukan interpretasi nilai hasil PDA. Pengujian tes SPT dilakukan pada dua titik yaitu titik DB – 1 dan titik DB – 2. Pengujian PDA dilakukan pada pile PB 3A – 1, PB 3A – 9, PHC 2A – 4, PHD 9A – 1, PHF 5A – 4, PHF 6A – 5, PC 4 – 34, dan PC 4 – 42. Perhitungan kalendering pada penelitian ini dilakukan pada pile yang mendekati titik soil test yaitu pile PB 1A – 11, PB 1A – 17, PB 3A – 1, PB 3A – 9, PC 2A – 45, dan PC 2A – 52.

            Perbandingan daya dukung spun pile menggunakan data SPT metode Luciano Decourt dengan interpretasi PDA yang paling mendekati yaitu pile PB 3A – 9 sebesar 40%, metode Tomlinson yaitu pile PB 3A – 9 sebesar 29%, dan metode US Army Corps yaitu pile PB 3A – 9 sebesar 30%. Perbandingan daya dukung spun pile menggunakan data kalendering metode Hilley dengan interpretasi PDA yang paling mendekati pada pile PB 3A – 9 sebesar 7%, metode ENR yaitu pile PB 3A – 9 sebesar 64%, dan metode Olsen&Flaate yaitu pile PB 3A – 9 sebesar 24%. Perbandingan daya dukung spun pile menggunakan data kalendering metode Hilley dengan data rata-rata SPT yang paling mendekati yaitu pile PB 1A – 11 sebesar 7%, metode ENR yaitu pile PB 1A – 17 sebesar 71%, dan metode Olsen&Flaate yaitu pile PB 1A – 11 sebesar 12%, pile PB 3A – 1 sebesar 12%, dan pile PB 3A – 9 sebesar 12%.

Kata Kunci: spun pile, Standard Penetration Test (SPT), Pile Driving Analysis (PDA), Kalendering

Abstract

        The foundation is one of the essential constructions in a building. The foundation as the lower structure is fundamental to carrying out the calculation of the carrying capacity analysis so that there is no structural failure. The Jalan Lingkar Luar Barat (JLLB) construction project uses a spun pile type of foundation. The foundation's bearing capacity can be analyzed by empirical, static, and dynamic testing. In this study, to calculate the analysis of the carrying capacity of the spun pile, only dynamic tests are used, namely, Standard Penetration Test (SPT), Pile Driving Analysis (PDA), and Calendaring. The carrying capacity of the spun pile from the SPT data was calculated using the Luciano Decourt, Tomlinson, and US Army Corps methods. The carrying capacity of the spun pile from the calendaring data was calculated using the Hiley, Engineering News-Record (ENR), and Olsen & Flaate methods. At the same time, the PDA test was interpreted to interpret the PDA results. The SPT test was carried out at two points, DB – 1 and DB – 2. PDA testing was carried out on piles PB 3A – 1, PB 3A – 9, PHC 2A – 4, PHD 9A – 1, PHF 5A – 4, PHF 6A – 5, PC 4 – 34, and PC 4 – 42. Calculation calculations in this study were carried out on piles close to the soil test point, namely piles PB 1A – 11, PB 1A – 17, PB 3A – 1, PB 3A – 9, PC 2A – 45, and PC 2A – 52.

        Comparison of the carrying capacity of spun piles using SPT data using the Luciano Decourt method with the closest PDA interpretation, namely PB 3A – 9 piles of 40%, Tomlinson's method of PB 3A – 9 piles of 29%, and the US Army Corps method is to pile PB 3A – 9 by 30%. Comparison of the carrying capacity of spun piles using calendaring data using the Hilley method with the closest PDA interpretation on PB 3A – 9 piles of 7%, the ENR method of PB 3A – 9 piles of 64%, and the Olsen&Flaate method of PB 3A – 9 piles of 24%. Comparison of the carrying capacity of spun piles using the Hilley method calendaring data with the closest SPT average data, namely PB 1A - 11 piles of 7%, the ENR method of PB 1A - 17 piles of 71%, and the Olsen & Flaate method of PB 1A - 11 piles by 12%, pile PB 3A – 1 by 12%, and pile PB 3A – 9 by 12%.

Keywords: spun pile, Standard Penetration Test (SPT), Pile Driving Analysis (PDA), Calendering