Pengaruh Variasi Jarak Pondasi dan Panjang Geotekstil Dengan Jarak Vertikal Antarlapis Perkuatan 9,1cm Terhadap Daya Dukung Pondasi Pada Pemodelan Fisik Lereng Pasir Kepadatan 74%

Igam, AmurKhikmi (2014) Pengaruh Variasi Jarak Pondasi dan Panjang Geotekstil Dengan Jarak Vertikal Antarlapis Perkuatan 9,1cm Terhadap Daya Dukung Pondasi Pada Pemodelan Fisik Lereng Pasir Kepadatan 74%. Sarjana thesis, Universitas Brawijaya.

Abstract

Di Indonesia, tanah longsor menduduki peringkat ketiga bencana yang banyak terjadi. Salah satu cara untuk mengatasi kelongsoran lereng dapat ditempuh dengan melakukan perkuatan lereng. Sistem perkuatan lereng yang digunakan adalah dengan memasang geotekstilwoven.Fungsi geotekstil dalam hal ini adalah untuk perkuatan tanah dimana geotekstil berinteraksi dengan tanah melalui gaya gesek atau gaya adhesi untuk menahan gaya tarik atau gaya geser, sehingga daya dukung lereng dapat meningkat. Pada penelitian ini dipakai model test dengan ukuran panjang 1,50 m, lebar 1,0 m dan tinggi 1,0 m. Penelitian ini dilakukan untuk mengetahui lokasi perkuatan optimum, dimana jarak pondasi dari tepi lereng dipasang dengan tiga variasi berbedayaitu d=b, d=1,5B dan d=2B. Serta dengan melakukan variasi panjang geotekstil dengan tiga variasi yaitu Lx=0,45H, Lx=0,52H dan Lx=0,59H. Proses pemadatan yang dipakai dalam penelitian ini adalah dengan cara membagi lereng model sebanyak tujuh lapisan dan dipadatkan dengan silinder beton yang digelindingkan. Pembebanan dilakukan dengan menambahkan beban setiap 25 kg secara bertahap hingga mencapai beban runtuh pada pemodelan lereng. Hasil dari pemasangan geotekstil dalam penelitian ini menunjukkan bahwa model lereng mengalami peningkatan daya dukung. Dimana peningkatan daya dukung paling maksimum terjadi saat jarak pondasi dari tepi lereng sebesar d=2B dengan panjang lapisan geotekstil sebesar Lx=0,59H. Berdasarkan pengujian ini dapat disimpulkan bahwa semakin jauh jarak pondasi dari tepi lereng dan semakin panjang lapisan geotekstil maka daya dukung semakin besar juga.

Item Type: Thesis (Sarjana)
Identification Number: SKR/FT/2014/23/051400733
Subjects: 600 Technology (Applied sciences) > 624 Civil engineering
Divisions: Fakultas Teknik > Teknik Sipil
Depositing User: Hasbi
Date Deposited: 10 Feb 2014 09:50
Last Modified: 21 Oct 2021 13:39
URI: http://repository.ub.ac.id/id/eprint/142510
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