KARAKTERISTIK KESTABILAN LERENG DAERAH JATIGEDE KABUPATEN SUMEDANG, PROVINSI JAWA BARAT BERDASARKAN ANALISIS KINEMATIK
DOI:
https://doi.org/10.30556/jtmb.Vol15.No2.2019.1009Kata Kunci:
Bendungan Jatigede, uniaxial compressive strenght, keruntuhan lereng, analisis kinematikAbstrak
Daerah penelitian secara administratif berada di Kecamatan Jatigede, Kabupaten Sumedang, Provinsi Jawa Barat. Berdasarkan sudut pandang geologi, daerah Jatigede memiliki beberapa permasalahan yang timbul akibat kondisi geologi daerah tersebut yaitu berupa pengaruh keberadaan struktur geologi yang berhubungan dengan stabilitas maupun keruntuhan lereng. Untuk dapat mengidentifikasi tipe keruntuhan lereng batuan, dapat dilakukan analisis kinematik menggunakan metode scanline sampling. Penelitian ini dibagi menjadi 15 lokasi scanline sampling. Pada penelitian, dilakukan juga perhitungan uniaxial compressive strenght (UCS) dan rock quality designation (RQD) pada lereng tumpuan barat Bendungan Jatigede. Hasil analisis kinematik mendapatkan potensi tipe keruntuhan baji pada lereng scanline (SL) 1, 4 – 11 sedangkan pada lereng SL 2 dan 3 tidak memenuhi syarat keruntuhan baji serta didapatkan kualitas massa batuan (RQD) sedang-sangat baik serta penentuan nilai UCS yang menunjukan kekuatan material batuan yang lemah.
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