Perencanaan Pondasi Bored Pile pada Pilar Jembatan Sungai Wain STA 19+350 - 19+600 Proyek Jalan Tol IKN Segmen 3A

Azzahra, Shafira Izza (2024) Perencanaan Pondasi Bored Pile pada Pilar Jembatan Sungai Wain STA 19+350 - 19+600 Proyek Jalan Tol IKN Segmen 3A. Diploma thesis, Institut Teknologi Sepuluh Nopember.

Text 2035201003_Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2026. Download (14MB) | Request a copy

Abstract

Jembatan Sungai Wain yang dibagi menjadi sisi utara dan selatan dengan panjang sisi Utara 918,2 m dan sisi Selatan 926,7 m dengan lebar jembatan 17,15 m. Perencanaan Jembatan Sungai Wain menggunakan struktur atas PCI girder 40,8 m, 45,8 m, 60,8 m dengan struktur bawah yaitu pile cap, pier leg, dan pier head. Penggunaan pondasi jembatan ini menggunakan pondasi tiang bor (bored pile) berdiameter 100 cm. Dalam merencanakan pondasi suatu bangunan, perlu memperhatikan beberapa faktor seperti jenis pondasi, kedalaman pondasi, jarak antar tiang, beban struktur, kondisi lingkungan, dan struktur tanah. Penggunaan pondasi bored pile sebagai struktur bawah pada Jembatan Sungai Wain proyek ini didasari oleh jenis tanah yang terdapat pada lokasi dominan berjenis tanah lempung. Tujuan perancangan ulang pondasi ini agar pondasi tersebut lebih kuat dalam menahan beban yang bekerja. Dalam proyek akhir ini akan dilakukan perencanaan kembali pondasi bored pile berdasarkan data hasil uji N-SPT dengan menggunakan metode Reese and O’neill,memperhitungkan penurunan elastis pada tiang tunggal dan kelompok, dan perhitungan penulangan struktur bawah. Hasil penurunan pada tiang kelompok akan dibandingkan menggunakan program bantu Plaxis 2D untuk mengontrol tingkat keakuratan. Hasil dari perencanaan pondasi direncanakan dengan 3 diameter berbeda yaitu 80 cm, 100 cm, dan 120 cm. Daya dukung ultimit (Qu) berdasarkan 5 data tanah yang ditinjau yaitu menghasilkan nilai pada JSW BH-14 kedalaman 32 m dengan diameter 80 cm sebesar 9613,385 kN, diameter 100 cm sebesar 12351,46 kN, diameter 120 cm sebesar 15223,41 kN. Pada BH-38 kedalaman 32 m diameter 80 cm sebesar 8232,386 kN, diameter 100 cm sebesar 10169,91 kN, diameter 120 cm 12624,4 kN. Pada JSW BH-16 kedalaman 32 m diameter 80 cm sebesar 9656,07 kN, diameter 100 cm sebesar 12539,67 kN, diameter 120 cm sebesar 15611,11 kN. Pada JBP 2 BH-1 kedalaman 26 m sebesar 8115,126 kN, diameter 100 cm sebesar 10516,94 kN, diameter 120 cm sebesar 13067,97 kN. Pada JBP 2 BH-3 diameter 80 cm sebesar 8503,606 kN, diameter 100 cm sebesar 11204,83 kN, diameter 120 cm sebesar 14136,19 kN. Berdasarkan perencanaan pondasi didapatkan tulangan pondasi pada tiga variasi diameter yaitu diameter 80 cm menggunakan tulangan longitudinal 12D25 an tulangan transversal spiral D13-200. Pada diameter 100 cm menggunakan tulangan longitudinal 18D25
dan tulangan transversal spiral D13-175. Pada diameter 120 cm menggunakan tulangan longitudianal 24D25 dengan tulangan transversal spiral D13-150. Nilai penurunan elastis total
tiang tunggal pada tiap pilar yang ditinjau memenuhi persyrataran ijin. Hasil perbandingan perhitungan penurunan manual dan Plaxis 2D didapatkan nilai hasil dari Plaxis 2D lebih kecil dibandingkan dengan perhitungan manual dengan selisih rata-rata penurunan tiang kelompok pada pilar yang ditinjau sebesar 68,41%. Berdasarkan perhitungan volume pekerjan pondasi bored pile pada setiap data yang ditinjau didapatkan nilai volume terkecil pada diameter 80 cm, maka pada perencanaan ini digunakan pondasi bored pile diameter 80 cm.

============================================================

The Wain River Bridge is split into north and south sides. The north side spans 918.2 meters,the south side 926.7 meters, and the bridge width is 17.15 meters. The planning of the Wain River Bridge uses PCI girder superstructures of 40.8 meters, 45.8 meters, and 60.8 meters with substructures consisting of pile caps, pier legs, and pier heads. The foundation of the bridge uses bored piles with a 100 cm diameter. When planning the foundation of a building,several factors need to be considered, such as the type of foundation, depth of the foundation,spacing between piles, structural loads, environmental conditions, and soil structure. The use of bored pile foundations for the substructure of the Wain River Bridge project is based on the predominantly clay soil at the location. The purpose of redesigning the foundation is to make it stronger in bearing the working loads. In this final project, the bored pile foundation will be redesigned based on N-SPT test data using the Reese and O’Neill method, considering the elastic settlement on single and group piles, and calculating the reinforcement of the substructure. The settlement results on group piles will be compared using the Plaxis 2D program to control accuracy levels.The foundation design results are planned with three different diameters, namely 80 cm, 100 cm, and 120 cm. The ultimate bearing capacity (Qu) based on five soil data reviews produced values at JSW BH-14 at a depth of 32 meters with an 80 cm diameter of 9613.385 kN, a 100 cm diameter of 12351.46 kN, and a 120 cm diameter of 15223.41 kN. At BH-38 with a depth of 32 meters, the 80 cm diameter yielded 8232.386 kN, the 100 cm diameter 10169.91 kN, and the 120 cm diameter 12624.4 kN. At JSW BH-16 with a depth of 32 meters, the 80 cm diameter yielded 9656.07 kN, the 100 cm diameter 12539.67 kN, and the 120 cm diameter 15611.11 kN. At JBP 2 BH-1 with a depth of 26 meters, the 80 cm diameter yielded 8115.126 kN, the 100 cm diameter 10516.94 kN, and the 120 cm diameter 13067.97 kN. At JBP 2 BH3, the 80 cm diameter yielded 8503.606 kN, the 100 cm diameter 11204.83 kN, and the 120
cm diameter 14136.19 kN. Based on the foundation design, the reinforcement for the foundation in three diameter variations was determined as follows: an 80 cm diameter uses 12D25 longitudinal reinforcement and D13-200 spiral transverse reinforcement, a 100 cm diameter uses 18D25 longitudinal reinforcement and D13-175 spiral transverse reinforcement,and a 120 cm diameter uses 24D25 longitudinal reinforcement with D13-150 spiral transverse reinforcement. The total settlement value for individual piles on each examined pier meets the allowable requirements. The comparison between manual settlement calculations and Plaxis 2D results showed that the Plaxis 2D results were smaller than the manual calculations, with an average group pile settlement difference of 68.41%. Based on the volume calculations of bored pile foundation work for each reviewed data, the smallest volume value was found for the 80 cm diameter, thus, an 80 cm diameter bored pile foundation is used in this design.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Pondasi Tiang Bor, Daya Dukung Pondasi, Penurunan, Plaxis 2D. Bored Pile Foundation, Foundation Bearing Capacity, Settlements, Plaxis 2D.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Shafira Izza Azzahra
Date Deposited:	05 Aug 2024 07:21
Last Modified:	05 Aug 2024 07:21
URI:	http://repository.its.ac.id/id/eprint/112285

Actions (login required)

View Item