Faktor Koreksi terhadap Daya Dukung Selimut Tiang pada Pasir akibat Perlakuan Limbah Cair Tahu

Bagas Dwi Indrawan; Agata Iwan Candra

doi:10.28932/jts.v22i2.13374

Penulis

Bagas Dwi Indrawan Program Studi Teknik Sipil, Universitas Kadiri, Kediri, 64112, Indonesia
Agata Iwan Candra Program Studi Teknik Sipil, Universitas Kadiri, Kediri, 64112, Indonesia

DOI:

https://doi.org/10.28932/jts.v22i2.13374

Kata Kunci:

Biocementation, Daya dukung tiang, Enzyme-induced precipitation, Koefisien tekanan tanah, Pasir, Urease

Abstrak

Pasir lepas memiliki densitas rendah dan hampir tidak memiliki kohesi, yang menyebabkan daya dukung pondasi tiang terbatas, baik terhadap beban aksial maupun lateral. Penelitian ini mengevaluasi efektivitas limbah cair tahu (LCT) sebagai sumber urease alami dalam metode Enzyme-Induced Carbonate Precipitation (EICP) untuk meningkatkan kapasitas dukung selimut (Qs) dan koefisien tekanan tanah lateral (K). Sampel pasir SP dicampur LCT sebesar 28,17% dari berat kering, diinkubasi lima hari, dan dibandingkan dengan air biasa sebagai kontrol. Pengujian menggunakan model tiang baja diameter 12 mm dipancang hingga 100 mm, sesuai ASTM D1143. Nilai Qu meningkat dari 0,0257 kN menjadi 0,1347 kN (424%), Qs meningkat dari 0,01064 kN menjadi 0,02885 kN (171%), dan koefisien tekanan tanah lateral (K) meningkat dari 0,83 menjadi 5,23 (530%). Faktor koreksi empiris (Fc = 6,2988) diintegrasikan dalam formulasi K untuk meningkatkan akurasi prediksi. Uji ANOVA menunjukkan perbedaan yang signifikan (p = 0,0211) antara perlakuan LCT dan kontrol. Hasil ini menunjukkan bahwa LCT mampu meningkatkan interaksi tanah–tiang melalui perubahan sifat mekanik, kohesi tanah di sekitar tiang, serta dapat menjadi solusi perbaikan tanah pasir lepas yang berkelanjutan dan ekonomis.

Unduhan

Data unduhan belum tersedia.

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