Analisis Daya Dukung dan Penurunan Pondasi Berdasarkan Data N-SPT Diverifikasi dengan Nilai PDA dan CAPWAP

Abstract

Foundation planning begins with determining the loads that will work or be distributed from the structures above it and then proceed with the process of determining the value of the bearing capacity of the foundation by gathering information about soil parameters at the plan location. One of the bridges in Section 1 of the Yogyakarta-Bawen toll road development project is the Sangu Banyu Underbridge which is located at Sta 72+925. To support the bridge structure, bored pile foundations are used as structural elements at the bottom of the bridge. The bearing capacity calculation method used is the Reese & Wright (1997) method and the pile settlement calculation used is the empirical method. The results of calculating the percentage difference in the settlement of the empirical method and the PDA test are -38.90%, -44.46%, -50.01%, - 40.35%, and -45.77%. The results of these percentages indicate that there has been a large decrease in the settlement value of the piles for all the tested piles and the average settlement percentage is -43.90. The results of the calculation of the percentage difference in settlement of the empirical method and CAPWAP analysis are -6.69 %, -3.36 %, -24.46 %, -8.90 %, and -8.36 %. The results of these percentages indicate that there was a large decrease in the settlement value of the piles for all the tested piles and the average percentage settlement was -10.35%