KAJIAN KINERJA DINDING PENGARAH REMBESAN DAN TES PERMEABILITAS DIAFRAGMA WALL PADA HILIR BENDUNGAN TUGU
DOI:
https://doi.org/10.32497/wahanats.v28i1.4560Keywords:
permeability, diaphragm walls, clay soil, observation wellAbstract
On the inside of the dam, there is a seamless instrumentation. V-Notch is one of the
standard dam safety instruments used to measure water dam seepage discharge. The
porous soil and high permeability around the V-Notch cause water seepage to not
be directed properly to the V-Notch. If it is not directed properly then the erosion of
the reed or piping cannot be detected. So we need a construction design of the
barrier wall for collecting water seepage, namely the wall diaphragm wall. The
purpose of this research is to analyze the material, evaluate the performance, and
compare the diaphragm wall. The method used is falling head test, monitoring
observation well (OW), direct observation method when working. The results of the
downstream wall diaphragm material permeability test using the fall head test show
that the largest permeability coefficient value is 1.3 x 10-5cm/sec. where this value
has reached a low coefficient of permeability. Results Downstream wall diaphragm
performance based on groundwater level at OW.8 < from OW.7. Downstream
diaphragm wall or water seepage collection barrier can be said to work well. From
the analysis method, the diaphragm wall is easier to work than using the Clay heap
method. This is proven because the diaphragm wall method can be carried out in the
rainy season and dry season. From the time calculation analysis, it is known that it
is faster to use the diaphragm method with an estimated working time of 4 months 2
days using 1 tool. As for the estimated length of time working with Clay soil piles is
7.5 months using 1.5 tools. Based on the calculation of the cost of drilling plastic
concrete is more expensive than the Clay heap method. The cost of diaphragm wall
is Rp. 9,581,703,257.38. and the cost of Clay is Rp. 8,742,490,556.95.
References
Arifin, M., & Budiyanto, M.A., 2021, Analisis Keruntuhan Bendungan (Dam Break Analysis) Dalam Upaya Mitigasi Bencana (Studi Kasus Di Waduk/ Bendungan Tempuran), CivETech, III (1).
BBWS. Brantas, 2018, Buku Kontrak III Proyek Bendungan Tugu Trenggalek.
Budiyanto, M.A, 2018, Penelusuran Waktu Perjalanan Banjir Dari Hulu Ke Hilir Sungai Code Sebagai Pertimbangan Early Warning Sistem, CivETech, 13 (1), 41”“52.
Lembaga penelitian tanah, 1979, Penuntun Analisa Fisika Tanah, Badan Litbang Pertanian
Mansuri, B., Salmasi, F., & Oghati, B., 2014, Effect of Location and Angle of Cutoff Wall on Uplift Pressure in Diversion Dam, Geotechnical and Geological Engineering, 32 (5), 1165”“1173.
Muchamad, O., & Udiyanto, A.B., 2017, Penelusuran Banjir Sungai Luk Ulo Akibat Perubahan Tutupan Lahan, Jurnal Geografi, 14 (1), 26”“39.
Mulyono, J., 2017, Konsepsi Keamanan Bendungan Dalam Pembangunan Dan Pengelolaan Bendungan, Jurnal Infrastruktur, 3 (01), 1”“62.
PT Gistec Prima, 2021a, Prosedur Manual Pemasangan Observation Well (Sumur Observasi).
PT Gistec Prima, 2021b, Prosedur Manual Pembacaan Observation Well dan Open Standpipe Piezometer & Pemeliharaan Water level meter (Deep Meters). 1”“5.
Purwanto; Pradoko Indra, Juwono; Pitojo Tri;, & Asmaranto; Runi., 2017, Analisa Keruntuhan Bendungan Tugu Kabupaten Trenggalek, Jurnal Teknik Pengairan, 8(2), 222”“230.
Reynold, W.D., and D.E.E., 2002, Falling head soil core (tank) method: Laboratory method. p. In D. E. Elrick and Campbell (Eds.), Method of Soil Analysis Part 4-Physical Method, 809”“812.
SDA, 2005, Pedoman Grouting Untuk Bendungan, Direktorat Jenderal Sumber Daya Air.
Sosrodarsono, S, 2002, Bendungan Tipe Urugan, jakarta:PT Pradnya Paramita
Sudaryanto, E., 2014, Laporan Kajian Singkat Desain, KSO Mettana - Brahma Setta Indonesia
Sudaryanto, E., 2016a, Justifikasi Teknis Bendungan Tugu Amandemen VI, KSO Mettana - Brahma Setta Indonesia
Sudaryanto, E., 2016b, Justifikasi Teknis Bendungan Tugu Amandemen VII, KSO Mettana - Brama Setta Indonesia
Sudaryanto, E., 2017, Justifikasi Teknis Bendungan Tugu Amandemen X, KSO Mettana - Brahma Setta Indonesia
Sudaryanto, E., 2020, Laporan Konsultan Bulan Juni, Trenggalek: Tim Konsultan Bendungan Tugu Trenggalek
Widagdo, 2018, Pelaksanaan Pengawasan Bangunan Utama Bendungan
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