Assessment of Soil Liquefaction Potential Based on SPT Values at Some Ground Profiles in the North Central Coast of Vietnam

Nu, Nguyen Thi; Duong, Nguyen Thanh; Son, Bui Truong

doi:10.24996/ijs.2021.62.7.12

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…In this study, 21 boreholes were utilized, with the number of blows recorded at every 2-meter depth. The advantage of the SPT lies in its provision of sand samples, facilitating the determination of fine grains and other grain characteristics [14]. In this research, all SPT and laboratory results were obtained from Jogjasolo Marga Makmur Corporation (JMM), investor and operator of the toll road.…”

Section: Methodsmentioning

confidence: 99%

Study of Liquefaction Potential in Toll Road Construction on Fine-Grained Soil

Setyobudianto

2023

GEOMATE

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Liquefaction is a natural phenomenon indicating the transformation of soil into a liquid state. This condition occurs when saturated sandy soil experiences shaking, causing an increase in pore water pressure and decreasing effective soil stress. This study aims to assess the liquefaction potential in the Solo-Yogyakarta-NYIA Kulonprogo Toll Road. Although several parameters influence the potential of liquefaction, this toll road must be vigilant due to its proximity to seismic sources. Preparing for liquefaction potential is crucial to ensure the stability of structures throughout their service life. This research thoroughly investigated liquefaction potential from the identification to the evaluation stage of 21 boreholes that indicate highly finegrained soils. The identification stage was conducted through grain size and soil properties analysis. The evaluation stage used the Factor of Safety (FS) with the Simplified Procedure and the Liquefaction Potential Index (LPI). The identification results show that several boreholes have liquefaction grain gradations and soil properties. The evaluation results using Peak Ground Acceleration (PGA) by Kanno Attenuation resulted in three borehole locations with FS < 1. The classification of liquefaction potential in these three boreholes is high and low. The analysis shows that one of the three boreholes has a significantly higher fines content than the others. Further investigation of this uniqueness can be conducted using another method, such as numerical analysis.

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Section: Methodsmentioning

confidence: 99%

Study of Liquefaction Potential in Toll Road Construction on Fine-Grained Soil

Setyobudianto

2023

GEOMATE

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“…In Vietnam, the soil liquefaction potential has received attention in recent years. However, most of the investigations in Vietnam evaluated the liquefaction potential for soil based on the results of the Standard Penetration Test (SPT) [22] or for soil distributed in big cities [23], [24]. Recently, Phong et al [25] investigated the liquefaction of sand in the coastal area of Soc Trang province distributed from about 6m to more than 43m with a loose and dense density.…”

Section: Research Significancementioning

confidence: 99%

Effect of Cyclic Stress Ratio on the Liquefaction Resistance of Fine Sand in Soc Trang, Vietnam Using Cyclic Triaxial Test

Phong¹

2023

GEOMATE

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In the literature, the effect of different factors on the liquefaction resistance of sand has been widely investigated using the cyclic simple shear test or cyclic triaxial test. In which, the effect of CSR on liquefaction resistance significantly depends on the type of sand. In Vietnam, the sandy soils are widely distributed in coastal areas where many wind power farms are built and planned to build. Thus, the liquefaction resistance of sandy soil in these areas should be evaluated. In this study, the effect of cyclic stress ratio (CSR) on the liquefaction resistance of sand distributed in the coastal area of Soc Trang province, Vietnam will be evaluated for the first time using cyclic triaxial apparatus (Wykeham Farrance). The sand samples were prepared using the dry pluviation method with a relative density of about 56%. The stress-controlled method with CSR from approximately 0.1 to 0.35, the effective confining stress of 50 kPa, and the frequency of 1 Hz were applied. The research results showed that the axial strain and build-up of pore water pressure significantly depended on the range of CSR. In particular, this research has indicated the threshold of CSR for the liquefaction of sandy soil in this study area. Accordingly, under the testing conditions, sand samples were not liquefied with a CSR of less than 0.25.

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“…However, a boundary of the application is somehow to initially identify liquefied zones. Numerous papers with regard to the potential liquefaction analysis of Northern Vietnam have been published (Chi and others, 2017;Nhung et al, 2018Nhung et al, , 2017Nu et al, 2021). It is noted that maps of LPI in Hanoi city were presented by Nhung et al (2017) and estimations of FS, LPI, and LSN were performed in the findings of Nu et al (2021), Nhung et al (2017Nhung et al ( , 2018.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous papers with regard to the potential liquefaction analysis of Northern Vietnam have been published (Chi and others, 2017;Nhung et al, 2018Nhung et al, , 2017Nu et al, 2021). It is noted that maps of LPI in Hanoi city were presented by Nhung et al (2017) and estimations of FS, LPI, and LSN were performed in the findings of Nu et al (2021), Nhung et al (2017Nhung et al ( , 2018. Hua et al (2017) reported the results of FS and designed earthquake-induced volumetric strains based on stratigraphy of the coastal seashore in Middle…”

Section: Introductionmentioning

confidence: 99%

Liquefaction assessment using alternative approaches: a case study of Ho Chi Minh City stratigraphy

Doan

Nguyen

Doan

et al. 2023

Preprint

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Liquefaction has been known as a phenomenon in which the shear strength and stiffness of saturated soil are reduced by the generation of pore water pressure under earthquake loading. Consequently, liquefaction-induced settlement can result in severe damages including building cracks or slope failure, which pose a threat to human lives and properties. In the current Vietnamese standard TCVN 9386:2012, liquefaction potential hazard is often evaluated using the simplified method, which solely identifies the areas with a high risk of liquefaction. Prediction of Safety Factor (FS), Settlement (S), Liquefaction Potential Index (LPI), and Liquefaction Severity Number (LSN) has not received sufficient attention to a completeness standard. This study assesses the liquefaction of the ground at Ho Chi Minh City, Vietnam by using four conventional methods: the simplified procedure, linear equivalent analysis, loosely-coupled effective stress analysis, and fully-coupled effective stress analysis based on standard penetration test (SPT) data in Ho Chi Minh Metropolitan City. A class of seismic events that are compatible with the design response spectrum in the Vietnamese standard TCVN 9386:2012 is used as input ground motion at the bedrock. According to the results of different methods, maps of ground settlement, LPI, and LSN are proposed as useful references for construction works on such ground, which may have a high potential for liquefaction and subsidence.

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Assessment of Soil Liquefaction Potential Based on SPT Values at Some Ground Profiles in the North Central Coast of Vietnam

Cited by 5 publications

References 15 publications

Study of Liquefaction Potential in Toll Road Construction on Fine-Grained Soil

Study of Liquefaction Potential in Toll Road Construction on Fine-Grained Soil

Effect of Cyclic Stress Ratio on the Liquefaction Resistance of Fine Sand in Soc Trang, Vietnam Using Cyclic Triaxial Test

Liquefaction assessment using alternative approaches: a case study of Ho Chi Minh City stratigraphy

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