Analisa Potensi Likuifaksi Berdasarkan Data Pengujian Sondir (Studi Kasus Gor Haji Agus Salim Dan Lapai, Padang)

Putra, Hendri Gusti; Hakam, Abdul; Lastaruna, Dody

doi:10.25077/jrs.5.1.11-22.2009

Cited by 6 publications

(3 citation statements)

References 0 publications

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“…Setelah melakukan pengujian sifat fisik tanah dan pengambilan berat volume maka akan diperoleh nilai GS, dmak dan dmin Untuk mengetahui berapa massa pasir dan massa air yang akan digunakan pada tiap-tiap kepadatan relatif desain, maka dilakukan perhitungan menggunakan hubungan Pers. 1-7 [11][12][13][14][15].…”

Section: Penyiapan Benda Ujiunclassified

Pengaruh Tinggi Muka Air Terhadap Deformasi Tanah Terlikuefaksi

Beddu

Rahainun

Fadliah

et al. 2022

RTCEJRD

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Liquefaction occurs in saturated loose sandy soils that experience an increase in pore water pressure due to the propagation of earthquake waves to the ground surface. This phenomenon raises various questions such as how the groundwater level can affect the occurrence of liquefaction events at different earthquake strengths. The purpose of this study was to determine the effect of groundwater level on liquefaction-prone soils at different seismic peak acceleration values and the effect of relative density (Dr) values on liquefaction-prone soils with variations in groundwater level and earthquake acceleration. In this study, a sample of Jono Oge sand soil was used from the occurrence of liquefaction that met the gradation criteria. The soil was separated through the #8 sieve and retained #100. The modeling technique is carried out with several variables such as the ratio of groundwater level (Hw/Hs) of 25%, 50%, 75%, and 90%, relative density (Dr) 30%-40% and 40%-50%, and at different peak accelerations of 0.3g and 0.4g. The modeling test uses a sieve shaker for earthquake vibrations.. The results of the study show that the difference in groundwater level affects the subsidence of liquefied soil where the settlement will be accure greater in the ratio of the groundwater level (Hw/Hs) and the peak acceleration is greater and vice versa, the difference in relative density (Dr) also affects the magnitude of the the settlement where the lower the Dr value for Hw/Hs and the greater the peak acceleration, the greater the settlement will be occure.

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Section: Penyiapan Benda Ujiunclassified

Pengaruh Tinggi Muka Air Terhadap Deformasi Tanah Terlikuefaksi

Beddu

Rahainun

Fadliah

et al. 2022

RTCEJRD

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“…According to Marcuson [8] the liquefaction is defined as a granular material transformation from solid to liquid form as a result of rising pore water pressure and effective stress loss. Rising water pressure of pores is caused by the tendency of granular material to become dense due to cyclic shear deformations.…”

Section: Liquefactionmentioning

confidence: 99%

Vibration Impact on Potentially Liquefactions Slope Deformation

Yusuf¹,

Haryadhi²,

Dermawan³

2021

Civense

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In an area that has potential for earthquake has possibility of losing soil stability and causing physical soil damage, one of them is liquefaction. This research was conducted to determine the magnitude of deformation on slopes with potentially liquefaction. The soil slope samples were tested using shaking table with slope 6°, 12°, 18°, 24° and the frequency was set 6.6 Hz, 7.4 Hz, 8 Hz, 9.5 Hz. Research began with examination of soil physical properties which had unit weight of density 1.81 gr/cm3, moisture content 2.31%, specific gravity 2.72, sand with coefficient of uniform is 2.1, coefficient curvature is 0.98 and angle of repose is 23.962°. By giving earthquake acceleration of 0.4g, 0.5g, 0.6g and 0.7g in the soil slope sample that was tested by shaking table, it was liquefaction occurred. Results of research, the greater slope and frequency given, so the lateral and axial deformation will increase. Minimum lateral deformation occurs at frequency 6.6 Hz with a slope 6° and maximum lateral deformation is 17 cm at frequency 9.5 Hz with a slope 24°, while minimum axial deformation is 0.5 cm at frequency 8 Hz with a slope 6° and a maximum axial deformation is 5 cm at frequency 9.5 Hz with a slope 24°, but 12-degree slope can considered as a safe slope for slope which holding vibration

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“…Compared to a predetermined safety factor of 1.50. It is concluded that the research area has a considerable liquefaction potential [2]. Based on previous research in Padang city, in planning the foundation for high-rise buildings and considering the tsunami load, it is also necessary to consider soil conditions in areas with liquefaction potential.…”

Section: Introductionmentioning

confidence: 99%

Planning of the foundation a three-story building constructed on potential liquefaction area in Air Tawar Estuary of Padang City

2021

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The earthquake has become one of the most lethal problems in Indonesia, especially across the ring of the fire zone. On September 30th, 2009, an earthquake with a magnitude of 7.6 SR occurred, triggering tsunami and liquefaction. The liquefaction potential and tsunami forces need to be mitigated when an earthquake happens to reduce the risk. This study designs the building foundation that can endure the loads from an earthquake, tsunami, and liquefaction in the Air Tawar estuary of Padang City. The soil profile and liquefaction potential can be identified with CPT (Cone Penetration Test) data. After identifying the liquefaction potential, the upper structure was designed to consider the earthquake load and tsunami waves according to FEMA P-464 (2012). Afterward, design the foundation dimensions based on the ultimate load from the upper structure, wherein the amount of the settlement should be smaller than the tolerable soil settlement. The method used in the paper is taking the CPT data in the Air Tawar Estuary. After analyzing the liquefaction potential, making an upper structure design with ETABS 2016, recapitulate the maximum joint reaction to design the foundation that can withstand the ultimate load, and calculate the amount of soil settlement. Thus the design of the upper structure and lower structure take into account liquefaction. The amount of soil settlement obtained in the building design is still within the tolerance range of 9.79 mm, where the maximum limit of reduction is 32m.

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Analisa Potensi Likuifaksi Berdasarkan Data Pengujian Sondir (Studi Kasus Gor Haji Agus Salim Dan Lapai, Padang)

Cited by 6 publications

References 0 publications

Pengaruh Tinggi Muka Air Terhadap Deformasi Tanah Terlikuefaksi

Pengaruh Tinggi Muka Air Terhadap Deformasi Tanah Terlikuefaksi

Vibration Impact on Potentially Liquefactions Slope Deformation

Planning of the foundation a three-story building constructed on potential liquefaction area in Air Tawar Estuary of Padang City

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