Dini Salasi, Mukti (2016) ANALISIS POTENSI, TINGKAT PENCAPAIAN TARGET DAN KONTRIBUSI PAJAK MINERAL BUKAN LOGAM DAN BATUAN TERHADAP PAJAK DAERAH DI KABUPATEN KLATEN. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
Daerah penelitian terletak di area southeast wall phase 5 dengan jenis material
terdiri dari batuan vulkanik, diorit, dan intermediate tonalite. Terdapat 8 monitoring
sector untuk mengukur water pressure dengan kedalaman dan kemiringan yang
berbeda-beda yaitu BHMW-01, BHMW-04, SBD 554, SBD 557, SBD 567, HD 705,
HD 698, dan HD 720. Alat yang digunakan untuk mengukur water pressure ialah
Readout manual dan Datalogger dimana pengukuran water pressure dilakukan dua
hari sekali yang dimaksudkan untuk mengetahui tingkat perubahan water pressure.
Di daerah penelitian terdapat dua sayatan yang dibuat berdasarkan letak monitoring
sector yaitu N1170E dan N1630E. Untuk menganalisis kestabilan lereng akan
menggunakan metode Bishop dan bantuan software Slide v.05.
Pada analisis kestabilan lereng phase 5 baik pada sayatan N1170E maupun
sayatan N1630E tergolong aman dengan faktor keamanan masing-masing 2,214 dan
2,24, akan tetapi ketika water pressure diaplikasikan pada lereng phase 6 yang jarak
nya sekitar 115 m tegak lurus dari lereng phase 5, baik N1170E maupun sayatan
N1630E mengalami ketidakstabilan dengan faktor keamanan 0,128 dan 0,592.
Untuk itu pada lereng phase 6 perlu dilakukan penentuan ambang batas water
pressure sebagai tindakan pencegahan terjadinya longsor yaitu dengan menjaga water
pressure di jarak 25 meter pertama tegak lurus lereng pada angka 350-450 kPa serta
di jarak 50 meter pertama pada angka 750-800 kPa. Dengan adanya penentuan
ambang batas water pressure tersebut, kondisi lereng phase 6 menjadi stabil dengan
nilai faktor keamanan sayatan N1170E maupun sayatan N1630E masing-masing 1,211
dan 1,206.
Rekomendasi jarak ambang batas tersebut dapat juga diaplikasikan pada
kedalaman drain hole yaitu dengan menjaga water pressure diantara angka 500-675
kPa untuk kedalaman 50 meter, 1100-1200 kPa untuk kedalaman 100 meter, dan
1550-1650 kPa untuk kedalaman 150 meter.
ABSTRACT
Observation area located in the Southeast area of phase 5 by type of wall
material consists of volcanic rocks, diorite, intermediate tonalite. There are eight
monitoring sectors to measure water pressure with varying depth and slope they are
BHMW-01, BHMW-04, SBD 554, SBD 557, SBD 567, HD 705, HD 698, and HD
720. The instrument used to measure water pressure is Readout manual and
Datalogger where water pressure measurements performed every two days is
intended to determine the rate of change in water pressure. In the observation area
there are two sections are made based on the location of monitoring sector those are
N1170E and N1630E. To analyze the stability of the slope, will use the Bishop
method and the help of software Slide v.05.
In the analysis of phase 5 slope stability both at the section N1170E and section
N1630E is safe with each safety factor 2,214 and 2,24, but when the water pressure
applied to the phase 6 slope, which is about 115 m distance perpendicular to the
phase 5 slope, either section N1170E and section N1630E are instability by safety
factor 0,128 and 0,592.
Therefore phase 6 slope necessary to determine the water pressure threshold as
a preventive action of the landslides, it’s by keep the water pressure distance in the
first 25 meters perpendicular to the slope in number 350-450 kPa and also in the
distance of first 50 meters in number 750-800 kPa. With the existence of that
threshold determination of water pressure, the condition of the phase 6 slope become
stable with the safety factor in section N1170E and section N1630E respectively
1,211 and 1,206.
The distance threshold recommendations can also be applied to the depth of
drain hole to keep the water pressure between the number of 500-675 kPa in the
depth of 50 meters, from 1100-1200 kPa for the depth of 100 meters, and 1550-1650
kPa for the depth of 150 meters.
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eny Suparny |
| Date Deposited: | 04 Aug 2016 07:57 |
| Last Modified: | 04 Aug 2016 07:57 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/4993 |
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