Analisis Potensi Likuefaksi dan Daya Dukung Fondasi Gedung Warehouse Finished Product PT. Unilever Indonesia Tbk., Rungkut, Surabaya

Agustadi, Asiva (2024) Analisis Potensi Likuefaksi dan Daya Dukung Fondasi Gedung Warehouse Finished Product PT. Unilever Indonesia Tbk., Rungkut, Surabaya. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tanah gedung gudang penyimpanan Warehouse Finished Product PT. Unilever Indonesia Tbk. berpotensi berbahaya mengalami likuefaksi. Tanah yang mengalami likuefaksi tentunya kehilangan daya dukung menjalar memengaruhi struktur bangunan atas dan bawah terutama struktur fondasi tiang pancang spun pile pracetak (precast spun pile).
Data SPT-CPT Laporan Penyelidikan Tanah Gedung Gudang Penyimpanan Warehouse Finished Product PT. Unilever Indonesia Tbk., Rungkut, Surabaya Berdasarkan Pengamatan Laboratorium dan Lapangan digunakan sebagai database untuk menganalisis potensi likuefaksi dan daya dukung fondasi tiang pancang gedung Warehouse Finished Product sebagai tindak lanjut permasalahan.Masing-masing dengan metode perhitungan perbandingan antara angka rasio tahanan siklik,Cyclic Resistance Ratio (CRR) terhadap angka rasio tegangan siklik, Cyclic Stress Ratio (CSR), Seed-Idriss-Boulanger untuk menganalisis potensi likuefaksi; Mayerhoff, daya dukung tanah untuk struktur fondasi tiang pancang; Reese-Wright, Terzaghi-Peck (1960), dan Luciano Decourt, daya dukung tiang yang keseluruhan analisisnya dilakukan dengan dan tanpa pengaruh likuefaksi dengan spesifikasi kebutuhan tiang pancang spun pile pracetak (precast spun pile) yang diinstal ke pile cap direkomendasikan, merupakan hasil hitungan keseluruhan analisis dengan perencanaan di dalam 2 kondisi dengan acuan angka keamanan (safety factor (SF)) masing-masing SF = 1,5; perencanaan dengan pengaruh likuefaksi akibat gempa berkekuatan 3 SR, 5 SR, dan 7 SR, dan SF = 3 tanah tidak terjadi apapun.
Sampel bore log SPT BH1 menunjukkan masing-masing gempa berkekuatan 3 SR dan 7 SR, dengan total tebal lapisan tanah 5,50 m dengan rentang kedalaman 5,50 m – 11,00 m, dan seluruh lapisan tanah sampel terlikuefaksi tak terkecuali akibat gempa berkekuatan 7 SR. Sedangkan 6 sampel CPT, hanya gempa berkekuatan 7 SR saja yang mengakibatkan likuefaksi dengan total tebal lapisan tanah terlikuefaksi rata-rata 7,33 m, mulai dari kedalaman -2,00 m lapisan tanah pertama sudah terlikuefaksi. Kebutuhan tiang pancang diinstal ke pile cap dengan acuan angka keamanan (safety factor (SF)) masing-masing SF = 1,5 = 498 precast spun pile, SF = 3 = 480 precast spun pile yang diinstal ke 5 jenis pile cap gedung gudang penyimpanan Warehouse Finished Product dengan luas bangunannya saja = 2160 m2 (60 m × 36 m).
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Warehouse Finished Product Unilever Indonesia Co. Ltd. building soil is potentially hazardous to be liquefacted. Liquefacted soil definitely loses its own bearing capacity that affects upper and lower structures, especially the precast spun piles.
The Warehouse Finished Product SPT-CPT data soil investigation report is used as a database to conduct the liquefaction potential and pile foundation bearing capacity analysis. By calculating the ratio between the Cyclic Resistance Ratio (CRR) toward Cyclic Stress Ratio (CSR), Seed-Idriss-Boulanger to do the liquefaction potential analysis, Mayerhoff to analyze the soil for the pile bearing capacity, next, Reese-Wright, Terzaghi-Peck (1960), and Luciano Decourt to analyze the pile bearing capacity. Every analysis through pile foundation design is done within with and without liquefaction conditions along safety factor (SF) references each SF = 1,5 and SF = 3, under the condition where there are 3 RS, 5 RS, and 7 RS earthquakes that trigger liquefaction, and as nothing happens to the soil.
A bore log SPT sample BH1 shows each 5,50 m – 11,00 m with the 5.5 m total soil layer thickness, and the whole soil layer liquefacted by each 3 RS and 7 RS earthquakes. 6 CPTs shows only the 7 RS earthquake settles 7,33 m total average soil layer thickness starts from -2,00 m depth already liquefacted. Precast spun-piles to pile caps requirements along safety factor (SF) references each SF 1,5 = 498 spun piles and SF = 3 = 480 spun piles installed to 5 types of pile cap for 2160 m2(60 m × 36 m) Warehouse Finished Product building only area.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Daya Dukung Tiang, Likuefaksi, Seed-Idriss-Boulanger, Liquefaction, Pile Bearing Capacity, Seed-Idriss-Boulanger
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction)
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	ASIVA AGUSTADI
Date Deposited:	16 Aug 2024 07:06
Last Modified:	16 Aug 2024 07:06
URI:	http://repository.its.ac.id/id/eprint/115411

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