Shaking table tests on liquefaction mitigation of embedded lifelines by backfilling with recycled materials

Otsubo, Masahisa; Towhata, Ikuo; Hayashida, Toshihiko; Liu, Bangan; Goto, Shigeru

doi:10.1016/j.sandf.2016.04.004

Cited by 39 publications

(14 citation statements)

References 15 publications

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“…The test procedure to model liquefaction using shaking table machine had been presented by several researchers, such as Varghese and Latha [7], Otsubo et al [8], Banerjee et al [9], Unni et al [10], Moss et al [11], Pathak et al [15], and Singh et al [16]. In general, the physical model of liquefaction using shaking table consisted of some equipment, such as actuator to release the kinetic energy, sample container, roller to demonstrate harmonic motion, and measurement sensors (accelerometers and pressure transducers).…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Varghese and Latha [7] conducted shaking table test to investigate the various factors influencing liquefaction potential on poorly graded sand. Otsubo et al [8] performed several shaking table tests to investigate the performance of the recycled backfill materials as the mitigation effort of soil liquefaction during the 2011 Tohoku Earthquake. Banerjee et al [9] conducted shaking table test to examine the liquefaction potential of Kasai River Sand in India.…”

Section: Introductionmentioning

confidence: 99%

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A Simple Shaking Table Test to Measure Liquefaction Potential of Prambanan Area, Yogyakarta, Indonesia

Mase

Fathani

Adi

2021

AEJ

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This paper presents the experimental study of liquefaction potential for sandy soil in Prambanan Area, Yogyakarta, Indonesia, which underwent liquefaction due to the Mw 6.3 Jogja Earthquake on May 27, 2006. Shaking table tests considering the variation of acceleration and shaking duration were performed to investigate the liquefaction potential of sand. The liquefaction time stages including time to start liquefaction, time to start pore pressure dissipation, and liquefaction duration were observed. The percentage of liquefaction duration increase, the excess pore water pressure ratio and the required time to generate liquefaction, and the effect of applied acceleration to cyclic stress ratio, were also presented. The results showed that the sand could undergo liquefaction under the variation of dynamic load. The variation of dynamic load significantly influenced the time stages of liquefaction, the increase of liquefaction duration percentage and cyclic stress ratio. The results also exhibited that the larger applied acceleration and the longer shaking duration means the longer liquefaction duration and the larger liquefaction potential. In general, the result could bring the recommendation to the liquefaction countermeasure for Prambanan Area.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Simple Shaking Table Test to Measure Liquefaction Potential of Prambanan Area, Yogyakarta, Indonesia

Mase

Fathani

Adi

2021

AEJ

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“…Gempa bumi dapat mengakibatkan terjadinya potensi likuefaksi yang berdampak terhadap kerusakan sarana dan prasarana infrastruktur [1]. Likuefaksi merupakan menurunnya kekuatan geser tanah yang disebabkan oleh beban seismik saat terjadinya gempa bumi (percepatan gempa lebih dari 0,25 g), saat tekanan air tanah naik maka tegangan efektif berkurang [2][3].…”

Section: Pendahuluanunclassified

Analisis Potensi Likuefaksi dan Perbaikan Tanah dengan Stone Column: Studi Kasus pada Coal Shelter PLTU Lontar, Banten

Fajarwati

Kusuma

2021

inersia

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The high demand for electricity needs requires the availability of new generation sites. The new plant developed is a PLTU in Lontar. The condition of coal shelter as a research site dominated by silty clay and silty sand and located in the earthquake zoning is high that the planning of the coal shelter area must accordance with the feasibility of building establishment, it is necessary to analyze the potential liquefaction and improvement methods. Soil improvement efforts to reduce the potential for liquefaction include soil improvement with stone columns. The method of liquefaction analysis in this study uses the method developed by Idriss and Boulanger. The results of the analysis of the potential for liquefaction at BH-1 occurred at a depth of 3-16 m and at BH-3 the potential for liquefaction occurred at a depth of 4-24 m. Potential of the thickest layer for liquefaction is at BH-3 with a depth of 24 m. Improvement with a stone column can reduce the potential for liquefaction and can increase the value of the safety factor against the potential for liquefaction at the coal shelter location. Improvement analysis with a stone column using Plaxis software, the value of the safe factor after installing the stone column at BH-1 FS 2.89, at BH-3 FS became 2.65. ABSTRAKBanyaknya permintaan kebutuhan listrik yang tinggi diperlukan ketersediaan lokasi pembangkit baru. Pembangkit baru yang dikembangkan yaitu PLTU Batubara di Lontar. Kondisi coal shelter sebagai lokasi penelitian yang didominasi oleh lapisan tanah lempung kelanauan dan pasir kelanauan serta berada pada zonasi gempa cukup tinggi sehingga perencanaan area coal shelter harus memenuhi syarat kelayakan pendirian bangunan, maka perlu dilakukan analisis potensi likuefaksi serta metode perbaikannya. Upaya perbaikan tanah untuk mengurangi potensi likuefaksi yaitu perbaikan tanah dengan stone column (kolom batu). Metode analisis likuefaksi pada penelitian ini menggunakan metode yang dikembangkan oleh Idriss dan Boulanger. Hasil analisis potensi likuefaksi pada titik BH-1 terjadi di kedalaman 3-16 m dan pada titik BH-3 potensi likuefaksi terjadi pada kedalaman 4-24 m. Lapisan yang paling tebal mengalami potensi likuefaksi ada pada titik BH-3 dengan kedalaman 24 m. Perbaikan dengan stone column dapat mengurangi potensi likuefaksi dan mampu meningkatkan nilai faktor keamanan terhadap potensi likuefaksi di lokasi coal shelter. Analisis perbaikian dengan stone column menggunakan software Plaxis, nilai faktor aman setelah dipasang stone column pada titik BH-1 FS 2,89, pada titik BH-3 FS menjadi 2,65.

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“…For the Babolsar sand (i.e., the sand used also in the current study), they decreased the relative density (D r ) of the sand about 20% in the model scale in order to compensate for the 10 times smaller e ective stress level, leading to more dilatant behavior in the model test. This type of scaling has been commonly used for the 1g model tests dealing with large deformation problems (e.g., [24][25][26][27]). Therefore, in this study, the loosest state of the Babolsar sand in the 1g box was achieved with D r = 30 2% corresponding to D r = 50% in the prototype scale using the adopted scaling factor (N = 10).…”

Section: Parametermentioning

confidence: 99%

Improvement of shallow foundations rested on saturated loose sand by zeolite-cement mixture: a laboratory study

2018

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Improvement operation of sands is carried out frequently by cement together with several other additives. Common additives have high manufacturing cost and negative environmental impact during their manufacturing process and recycling in nature. Zeolite as a mineral substance for cement replacement can improve the strength parameter of a treated sand, without the negative de ciencies of the common additives. In this study, Uncon ned Compression Strength (UCS) and small-scale 1g model tests were conducted to evaluate the mechanical features of zeolite-treated sand and to study the behavior of shallow foundations resting on zeolite pad, respectively. The results of this study demonstrate that the UCS of the cemented sand samples increases when the cement is replaced by zeolite at an optimum proportion of 40% with curing times of 14 and 28 days. Adding this amount of zeolite to cemented sand mixture causes an increase in terms of the improvement rate between 40% and 125% and increases the Bearing Capacity Ratio (BCR) of the strip foundation treated by zeolite pad in the range of 11% to 420%. In addition, zeolite pad leads to a decline in the settlement of the treated strip footing from 16% to 86% in terms of the Settlement Reduction Ratio (SRR).

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Shaking table tests on liquefaction mitigation of embedded lifelines by backfilling with recycled materials

Cited by 39 publications

References 15 publications

A Simple Shaking Table Test to Measure Liquefaction Potential of Prambanan Area, Yogyakarta, Indonesia

A Simple Shaking Table Test to Measure Liquefaction Potential of Prambanan Area, Yogyakarta, Indonesia

Analisis Potensi Likuefaksi dan Perbaikan Tanah dengan Stone Column: Studi Kasus pada Coal Shelter PLTU Lontar, Banten

Improvement of shallow foundations rested on saturated loose sand by zeolite-cement mixture: a laboratory study

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