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All Journal Indonesian Mining Journal JURNAL SUMBER DAYA AIR
Hendarmawan H
Universitas Padjadjaran
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

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KORELASI NILAI SONDIR terhadap PARAMETER GEOTEKNIK dan rembesan pada PONDASI TANGGUL FASE E, KALIBARU, JAKARTA UTARA Pulung Arya Pranantya; Emi Sukiyah; Edi Prasetyo Utomo; Hendarmawan H
JURNAL SUMBER DAYA AIR Vol 14, No 2 (2018)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2153.085 KB) | DOI: 10.32679/jsda.v14i2.177

Abstract

Tembok sisi luar waduk pada rancangan fase Darurat tanggul laut NCICD merupakan rencana pengamanan kawasan DKI Jakarta dari banjir ROB. Banjir yang terjadi merupakan rangkaian dari besarnya curah hujan di bagian hulu dan naiknnya muka air laut di bagian hilir. Diantara penyebab tersebut juga terdapat fenomena land subsidence yang memberi dampak terhadap banjir. Tanggul sisi luar tersebut masih memiliki beberapa alternatif jensi tanggul yang akan dibangun, diantaranya adalah tembok laut, sheet pile, spun pile bahkan timbunan tanah biasa. Dalam penelitian ini akan dibahas mengenai kemungkinan tanggul timbunan untuk pengamanan banjir Ketersediaan data untuk perhitungan adalah tiga buah titik sondir di sekitar kawasan muara Kalibaru. Dari data tersebut, didapatkan parameter masing masing litologi sehingga analisis dapat dilanjutkan menjadi analisis rembesan dan stabilitas. Berdasarkan perhitungan tersebut, dapat juga diprediksi mengenai bahaya piping atau erosi buluh di dasar timbunan. Bahaya piping di dasar tanggul terjadi pada material pasir pada saat ketinggian muka air laut existing dan saat ketinggian muka air laut bertambah dua meter tanpa menggunakan sheet pile. Berdasarkan korelasi tiga titik lokasi data sondir di daerah penelitian terhadap Grafik Robertson 1990 didapatkan lima lapisan tanah berturut-turut dari atas ke bawah adalah: lempung lanauan, pasir lanauan, lanau pasiran, pasir lanauan, dan pasir.
PRELIMINARY GEOMECHANICAL ANALYSIS ON LIMESTONES IN PPSDM GEOMINERBA CAMPUS, PADALARANG, WEST JAVA Irvan Sophian; Herlinawati H; Nur Khairullah; Abdurrokhim A; Iyan Haryanto; Hendarmawan H
Indonesian Mining Journal Vol 22, No 1 (2019): INDONESIAN MINING JOURNAL, Vol. 22 No. 1, April 2019
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1123.8 KB) | DOI: 10.30556/imj.Vol22.No1.2019.985

Abstract

The research location is in the PPSDM Geominerba field campus. The campus is located in Padalarang, West Java that is surrounded by the open-pit mining of limestone and marble. This limestone was formed in Oligo-Miocene of Rajamandala Formation. The research objective was to determine the condition of the slopes around the campus based on geomechanical characteristics. Based on field observations, the slope angle in the area is dominated by steep slopes. The rock hardness level is dominated by hard rock with a hardness ranging from 50-100 MPa. Rock Mass Rating shows that the area is dominated by good rocks. While the Slope Mass Rating calculation show that the maximum slope angle is between 52-75°. Level of deformation and intensive weathering process will reduce the strength of the rock in the future. Several rock fall occurrences on this research area support this assumption. Yet, some local open pit mining area activity near the toe hill of the area need to be concerned regarding the effect of the local rock fall occurrences.
Co-Authors Abdurrokhim ⠀ Edi Prasetyo Utomo Emi Sukiyah Herlinawati H Irvan Sophian Iyan Haryanto Nur Khairullah Pulung Arya Pranantya