TRIPUTRANTO, FILIPUS ANGGARA (2013) ANALISIS KEKUATAN GESER TANAH SEKITAR AKAR BAMBU DIBANDINGKAN TANAH DILUAR DAERAH AKAR BAMBU DI DISPOSAL PIT 3 BANKO BARAT PT. BUKIT ASAM,. TBK TANJUNG ENIM, SUMATRA SELATAN. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
Areal Penambangan PT. Bukit Asam (Persero) Tbk Unit Penambangan
Tanjung Enim (PTBA UPTE) berlokasi di Kecamatan Tanjung Enim, Kabupaten
Muara Enim, Propinsi Sumatera Selatan. Lokasi penelitian berada pada disposal
Pit 3 Banko Barat dengan koordinat titik tengah daerah BA (sampel tanah tidak
terganggu mengandung akar tanaman bambu) A,B,C (X = 0368129m ; Y =
9586972m ) dan koordinat titik tengah daerah TA (sampel tanah tidak terganggu
tidak mengandung akar tanaman bambu) D,E,F (X = 0368113m ; Y = 9586987m).
Penelitian ini berawal mula dari tanaman yang ditanam pada area disposal PTBA
sebagai penahan gerakan tanah yakni tanaman akasia pada waktu yang belum
lama diketahui bahwa bunganya dapat mengganggu pernapasan manusia sehingga
dicari alternatif tanaman lain. Secara khusus dalam penelitian ini yang dianalisis
adalah tanaman bambu sebab pada lokasi sekitar ditemukan sejumlah rumpun
bambu yang mampu hidup.
Pengujian secara khusus yang dilakukan adalah uji geser langsung
menggunakan alat uji motorized direct shear test (sifat mekanik) dan beberapa
pengujian lain : kandungan air tanah dan batuan, specific gravity tanah, densitas
tanah dan batuan, batas cair, batas plastis, dan indeks plastisitas tanah, serta
ukuran butir tanah (sifat fisik)
Hasil analisis pengujian sifat mekanik menunjukkan bahwa akar tanaman
bambu memberikan pengaruh peningkatan terhadap besarnya nilai kuat geser
tanah pada sampel BA apabila dibandingkan dengan sampel TA. Nilai kuat geser
pick point sampel BA adalah 61,5 kPa sedangkan sampel TA adalah 57,21 kPa
kemudian nilai kuat geser residual point sampel BA adalah 53,76 kPa sedangkan
sampel TA adalah 43,54 kPa.
Hasil analisis pengujian-pengujian sifat fisik bahwa keseluruhan sampel
tergolong lempung anorganik, berplastisitas tinggi, pada sampel BA A, BA B, BA
C, TA D, TA E termasuk pada golongan tanah basah sedangkan sampel TA F
termasuk pada golongan tanah sangat lembab, berdasarkan sistem USCS seluruh
sampel termasuk golongan CH sedangkan berdasarkan sistem AASHTO sampel
BA termasuk A-7-6 (34) dan sampel TA termasuk A-7-6 (36)
ABSTRACT
PT. Bukit Asam (Persero) Tbk, Tanjung Enim Mining Unit (PTBA UPTE)
District is located in Tanjung Enim, Muara Enim regency, South Sumatra
Province. The study site is located at disposal Pit 3 West Banko in which the
midpoint coordinates of BA area (undisturbed soil samples containing roots of
bamboo plants) is A, B, C (X = 0368129m ; Y = 9586972m) and the coordinates
of the midpoint of TA area (undisturbed soil samples did not contain bamboo
plant roots) is D, E, F (X = 0368113m ; Y = 9586987m ). This study begins from
plants grown in the PTBA disposal area in order to retain soil movement, the plant
chosen is acacia, in which recently knows that the pollen can interfere human’s
respiration, so that alternative plant is needed. The object analyzed in this study is
bamboo, seeing that bamboo groves grow on that area.
The certain test conducted is direct shear test using test equipment
motorized direct shear test (mechanical properties) and some other tests: the water
content on the ground and rocks, specific soil gravity, soil and rock density, liquid
limit, plastic limit, and plasticity index of the soil, as well as soil grain size
(physical properties)
The analysis results on the mechanical properties show that bamboo roots
influence the increasing magnitude in shear strength of the soil at the BA samples
compare with the TA samples. The pick point shear strength value in sample BA
is 61.5 kPa, while the TA sample is 57.21 kPa. However the residual shear
strength value of the sample point BA is 53.76 kPa, while the TA sample is 43.54
kPa.
The result analysis of the tests shows that the physical properties of the
overall samples are classified as inorganic clays, high plasticity. The BA A, BA
B, BA C, D TA, TA E samples are including wet soil. However the TA F sample
is categorized as very humid soil. Based on USCS system, all samples are
categorized on CH group. However based AASHTO system, the BA samples are
categorized as A-7-6 (34) and the A-TA samples are categorized as 7-6 (36).
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TD Environmental technology. Sanitary engineering |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment |
| Depositing User: | Mr Suninto Prabowo |
| Date Deposited: | 25 May 2016 02:48 |
| Last Modified: | 25 May 2016 03:37 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/2374 |
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