PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI BERDASARKAN UJI SHAKING TABLE
Liquefaction is the changing events of soil characteristic from the solid state into liquid, caused by cyclic loading when an earthquake occurs that increases the pore water pressure exceeds effective stress soil. Liquefaction generally occurs in regions which are formed by a layer of granular sedim...
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| Format: | Thesis |
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[Yogyakarta] : Universitas Gadjah Mada
2014
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| author | , Bimawijaya Laia , Teuku Faisal Fathani ST. MT. Ph.D |
| author_facet | , Bimawijaya Laia , Teuku Faisal Fathani ST. MT. Ph.D |
| author_sort | , Bimawijaya Laia |
| collection | UGM |
| description | Liquefaction is the changing events of soil characteristic from the solid state into liquid, caused by cyclic loading when an earthquake occurs that increases the pore water pressure exceeds effective stress soil. Liquefaction generally occurs in regions which are formed by a layer of granular sediment, and water saturated with sufficiently low density. Evaluation of the effect of the relative density of the soil liquefaction mechanism can be determined by performing an experimental test using a vibrating table (shaking table) that can model the shear waves caused by earthquakes.
Experimental test was conducted using soil samples from Kali Opak Pleret districts, Bantul, Yogyakarta, with value of coefficient of curvature (Cc) of 1,63 and coefficient of uniformity (Cu) of 2,44, which indicates that sandy soil inculded in the poorly grade. Variations of soil relative density used were 25%, 35%, 45%, and 55%. Variations of earthquake maximum ground acceleration used were 0.3g, 0.35g, 0.4g, with vibrating duration of 32 second. Parameter used to determine liquefaction was excess pore water pressure ratio (ru). If ru � 1 then liquefaction could occur, whereas if ru < 1 then liquefaction could not occur.
From the results of soil physical properties test, it is known that Kali Opak Pleret sand is loose sandy soil type, its sand particles tend to be spherical and similar and on the range of the most potential liquefaction zones based on granular gradation test results. Analysis of the shaking table test showed that the relative density of the soil greatly affects the liquefaction potential. The largest liquefaction potential in soil relative density of 25 % with the highest ratio of maximum excess pore water pressure (rumaks) recorded of 1,74 for maximum ground acceleration of 0.4g, and the lowest was recorded at 0.27 in the relative density of 55% for maximum ground acceleration of 0.3g. These result indicate that the relative density of 25 % soil and 35 % had a liquefaction potential, but the relative density of 45 % soil and 55 % there were no potential liquefaction. These results indicate soil Opak Pleret with density of 24.35% in the field, has potential to experience liquefaction. The greatest surface settlement occured at relative density of 25% is equal to 4 cm, and the lowest is at relative density of 55% equal to 0,5 cm. |
| first_indexed | 2024-03-13T23:30:08Z |
| format | Thesis |
| id | oai:generic.eprints.org:130697 |
| institution | Universiti Gadjah Mada |
| last_indexed | 2024-03-13T23:30:08Z |
| publishDate | 2014 |
| publisher | [Yogyakarta] : Universitas Gadjah Mada |
| record_format | dspace |
| spelling | oai:generic.eprints.org:1306972016-03-04T07:53:27Z https://repository.ugm.ac.id/130697/ PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI BERDASARKAN UJI SHAKING TABLE , Bimawijaya Laia , Teuku Faisal Fathani ST. MT. Ph.D ETD Liquefaction is the changing events of soil characteristic from the solid state into liquid, caused by cyclic loading when an earthquake occurs that increases the pore water pressure exceeds effective stress soil. Liquefaction generally occurs in regions which are formed by a layer of granular sediment, and water saturated with sufficiently low density. Evaluation of the effect of the relative density of the soil liquefaction mechanism can be determined by performing an experimental test using a vibrating table (shaking table) that can model the shear waves caused by earthquakes. Experimental test was conducted using soil samples from Kali Opak Pleret districts, Bantul, Yogyakarta, with value of coefficient of curvature (Cc) of 1,63 and coefficient of uniformity (Cu) of 2,44, which indicates that sandy soil inculded in the poorly grade. Variations of soil relative density used were 25%, 35%, 45%, and 55%. Variations of earthquake maximum ground acceleration used were 0.3g, 0.35g, 0.4g, with vibrating duration of 32 second. Parameter used to determine liquefaction was excess pore water pressure ratio (ru). If ru � 1 then liquefaction could occur, whereas if ru < 1 then liquefaction could not occur. From the results of soil physical properties test, it is known that Kali Opak Pleret sand is loose sandy soil type, its sand particles tend to be spherical and similar and on the range of the most potential liquefaction zones based on granular gradation test results. Analysis of the shaking table test showed that the relative density of the soil greatly affects the liquefaction potential. The largest liquefaction potential in soil relative density of 25 % with the highest ratio of maximum excess pore water pressure (rumaks) recorded of 1,74 for maximum ground acceleration of 0.4g, and the lowest was recorded at 0.27 in the relative density of 55% for maximum ground acceleration of 0.3g. These result indicate that the relative density of 25 % soil and 35 % had a liquefaction potential, but the relative density of 45 % soil and 55 % there were no potential liquefaction. These results indicate soil Opak Pleret with density of 24.35% in the field, has potential to experience liquefaction. The greatest surface settlement occured at relative density of 25% is equal to 4 cm, and the lowest is at relative density of 55% equal to 0,5 cm. [Yogyakarta] : Universitas Gadjah Mada 2014 Thesis NonPeerReviewed , Bimawijaya Laia and , Teuku Faisal Fathani ST. MT. Ph.D (2014) PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI BERDASARKAN UJI SHAKING TABLE. UNSPECIFIED thesis, UNSPECIFIED. http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=71124 |
| spellingShingle | ETD , Bimawijaya Laia , Teuku Faisal Fathani ST. MT. Ph.D PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI BERDASARKAN UJI SHAKING TABLE |
| title | PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI
BERDASARKAN UJI SHAKING TABLE |
| title_full | PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI
BERDASARKAN UJI SHAKING TABLE |
| title_fullStr | PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI
BERDASARKAN UJI SHAKING TABLE |
| title_full_unstemmed | PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI
BERDASARKAN UJI SHAKING TABLE |
| title_short | PENGARUH KERAPATAN TANAH PASIR KALI OPAK PLERET YOGYAKARTA TERHADAP POTENSI LIKUIFAKSI
BERDASARKAN UJI SHAKING TABLE |
| title_sort | pengaruh kerapatan tanah pasir kali opak pleret yogyakarta terhadap potensi likuifaksi berdasarkan uji shaking table |
| topic | ETD |
| work_keys_str_mv | AT bimawijayalaia pengaruhkerapatantanahpasirkaliopakpleretyogyakartaterhadappotensilikuifaksiberdasarkanujishakingtable AT teukufaisalfathanistmtphd pengaruhkerapatantanahpasirkaliopakpleretyogyakartaterhadappotensilikuifaksiberdasarkanujishakingtable |