LAPORAN PENDAHULUAN Sertifikasi Desain Bendungan Ameroro di Kabupaten Konawe, Provinsi Sulawesi Tenggara KATA PENGANTAR Berdasarkan Kontrak Kerja antara PPK Pembangunan Bendungan, Satuan Kerja Balai Wilayah Sungai Sulawesi IV Kendari, dengan PT. Mettana No. Kontrak No. : HK.02.03/BWS.14.05.2/ 144/2019, tanggal 05 April 2019 tentang pelaksanaan Pekerjaan Sertifikasi Desain Bendungan Ameroro di Kabupaten Konawe, Provinsi Sulawesi Tenggara, berikut ini kami sampaikan: LAPORAN PENDAHULUAN Laporan Pendahuluan ini berisikan tentang latar belakang, maksud dan tujuan, kriteria desain bendungan, hasil studi terdahulu, metodologi pelaksanaan kegiatan sertfikasi desain bendungan, organisasi pelaksana pekerjaan, dan rencana jadwal pelaksanaan pekerjaan. Demikian Laporan Pendahuluan ini kami sampaikan. Selanjutnya atas semua bantuan dan dukungan dari semua pihak terkait kami ucapkan terima kasih. PT. Mettana Jehan Bramantyo, ST., MT. Direktur i E N G IN E E R IN G C O N S U L T A N T LAPORAN PENDAHULUAN Sertifikasi Desain Bendungan Ameroro di Kabupaten Konawe, Provinsi Sulawesi Tenggara DAFTAR ISI KATA PENGANTAR ....................................................................................................... i DAFTAR ISI ................................................................................................................ ii BAB I PENDAHULUAN ............................................................................................. I-1 1.1 1.2 LATAR BELAKANG ............................................................................................... I-1 MAKSUD, TUJUAN DAN SASARAN PEKERJAAN ....................................................... I-2 1.2.1 Maksud Pekerjaan......................................................................................... I-2 1.2.3 Sasaran Pekerjaan ........................................................................................ I-2 1.2.2 1.3 Tujuan Pekerjaan ......................................................................................... I-2 LINGKUP PEKERJAAN .......................................................................................... I-2 1.3.1 Pekerjaan Persiapan...................................................................................... I-2 1.3.2 Pengumpulan Data Sekunder ......................................................................... I-3 1.3.4 Investigasi Geologi/Geologi Teknik/Mekanika Tanah ........................................ I-4 1.3.6 Kajian Penyempurnaan Desain ....................................................................... I-7 1.3.3 1.3.5 1.3.7 Kegiatan Pengukuran dan PemetaanTopografi ................................................ I-3 Kegiatan Pengujian Laboratorium ................................................................... I-6 Kegiatan Proses Sertifikasi Desain Komisi Keamanan Bendungan .................... I-11 1.4 LOKASI PEKERJAAN........................................................................................... I-11 1.6 SISTEMATIKA LAPORAN PENDAHULUAN ............................................................. I-20 1.5 DATA TEKNIS ................................................................................................... I-14 BAB II KRITERIA DESAIN...................................................................................... II-1 2.1 2.2 PERSYARATAN TEKNIS DAN ADMINISTRASI ....................................................... II-1 NSPM BENDUNGAN URUGAN ............................................................................. II-2 2.2.1 Bendungan Tipe Urugan .............................................................................. II-3 2.2.3 Lebar Puncak ............................................................................................. II-3 2.2.2 2.2.4 2.2.5 2.2.6 2.2.7 Elevasi Puncak Bendungan .......................................................................... II-3 Kemiringan Lereng Urugan .......................................................................... II-5 Tinggi Jagaan ............................................................................................. II-5 Tinggi Tubuh Bendungan ............................................................................ II-5 Ketersediaan Material .................................................................................. II-6 2.2.8 Selimut Kedap Air Kolam Bendungan ............................................................ II-6 2.2.10 Selimut Semen-Tanah ................................................................................. II-6 2.2.9 2.2.11 2.2.12 Selimut Kedap Air dari Bahan Alami (Lempung) ............................................. II-6 Selimut Bahan Sintetis ................................................................................ II-7 Pelindung Lereng ........................................................................................ II-7 E N G IN E E R IN G C O N S U L T A N T ii LAPORAN PENDAHULUAN Sertifikasi Desain Bendungan Ameroro di Kabupaten Konawe, Provinsi Sulawesi Tenggara 2.2.13 Bangunan Penyadap (Intake) ...................................................................... II-8 2.3.1 Klasifikasi Kelas Risiko ................................................................................. II-9 2.3.3 Kriteria Faktor Keamanan ...........................................................................II-11 2.3 KLASIFIKASI BAHAYA BENDUNGAN .................................................................... II-9 2.3.2 Kriteria Beban Gempa untuk Desain Bendungan ........................................... II-10 BAB III HASIL STUDI TERDAHULU ...................................................................... III-1 3.1 3.2 RANGKAIAN KEGIATAN..................................................................................... III-1 KEGIATAN SURVEY LAPANGAN YANG TELAH DILAKUKAN.................................... III-1 3.2.1 Survey Topografi ....................................................................................... III-1 3.2.3 Rencana As Bendungan ............................................................................ III-20 3.2.2 3.2.4 3.2.5 3.2.6 3.3 Investigasi Geologi dan Geologi Teknik ........................................................ III-7 Bangunan Pelimpah (Spillway) .................................................................. III-23 Bangunan Pengelak (Conduit) ................................................................... III-24 Permeabilitas........................................................................................... III-25 KEGIATAN ANALISIS DAN DESAIN ................................................................... III-26 3.3.1 Analisis Hidrologi ..................................................................................... III-26 3.3.3 Perencanaan Pelimpah ............................................................................. III-32 3.3.2 3.3.4 3.3.5 Perencanaan Tubuh Bendungan ................................................................ III-30 Desain Pengelak ...................................................................................... III-33 Rencana Anggaran Biaya .......................................................................... III-35 BAB 4 METODOLOGI SERTIFIKASI ........................................................................ IV-1 4.1 UMUM .............................................................................................................. IV-1 4.3 BAGAN ALIR PELAKSANAAN PEKERJAAN ............................................................. IV-4 4.2 METODOLOGI ................................................................................................... IV-2 BAB V ORGANISASI PELAKSANAAN PEKERJAAN DAN RENCANA KERJA ................... 1 5.1 STRUKTUR ORGANISASI ..................................................................................... V-1 5.1.1 Struktur Organisasi Pemilik Pekerjaan ............................................................ V-1 5.1.3 Struktur Organisasi Pemilik Pekerjaan dan Penyedia Jasa ................................ V-1 5.1.2 5.2 TUGAS DAN TANGGUNG JAWAB PERSONIL PELAKSANA ........................................ V-5 5.2.1 5.2.2 5.3 Struktur Organisasi Penyedia Jasa ................................................................. V-1 Tenaga Ahli ................................................................................................. V-5 Tenaga Penunjang ....................................................................................... V-9 RENCANA KERJA .............................................................................................. V-10 5.3.1 Jadwal Pelaksanaan Pekerjaan .................................................................... V-10 5.3.3 Jadwal Penggunaan Peralatan..................................................................... V-10 5.3.2 Jadwal Penugasan Personil ......................................................................... V-10 iii E N G IN E E R IN G C O N S U L T A N T