Effectiveness of vertical drains in mitigation of liquefaction

Brennan, Andrew; Madabhushi, Spg

doi:10.1016/s0267-7261(02)00131-8

Cited by 67 publications

(25 citation statements)

References 4 publications

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“…At shallower sections fluid leaves through the surface rather than through the drain itself. Such a phenomenon was also observed by Brennan and Madabhushi (2002). In dynamic conditions, their effectiveness in excess pore pressure reduction is not predominant; and for all tests any change in the behaviour of the remediated ground is primarily a result of the stiffening effect of the gravel drains.…”

Section: Acceleration Time Historiessupporting

confidence: 65%

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Evaluation of gravel drains and compacted sand piles in mitigating liquefaction

Sadrekarimi

Ghalandarzadeh

2005

Proceedings of the Institution of Civil Engineers - Ground Impr

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Liquefaction induced by earthquakes can cause major destruction to foundations and buildings, mainly as a result of excess pore water pressure generation and softening of the subsoil. Several remediation methods are performed that reduce the excess pore pressure, enhance the shear deformability of the soil, and fortify the soil. Two well-known methods-gravel drains and compacted sand piles-are discussed and compared in this paper. Some precisely prepared 1g shaking table tests are performed regarding these methods. Tests are done with and without the presence of an improvement method, and the accelerations, pore water pressures and settlements are monitored during the tests. The outcomes, judged against each other, reveal that compacted sand piles are more efficient than gravel drains in the case of liquefaction resistance and settlement of the subsoil during the shaking period. Nevertheless, after shaking, the efficiency of the gravel drains is ameliorated by the means of excess pore pressure dissipation.

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Section: Acceleration Time Historiessupporting

confidence: 65%

“…Several shortcomings of gravel drains have been reported in the literature. Collective experience suggests that, although drains can certainly provide a solution, settlement can still occur to an unsatisfactory degree (Brennan and Madabhushi, 2002).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of gravel drains and compacted sand piles in mitigating liquefaction

Sadrekarimi

Ghalandarzadeh

2005

Proceedings of the Institution of Civil Engineers - Ground Impr

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“…The pioneering work on gravel drains as a possible method to stabilize liquefaction susceptible soil deposit is reported by Seed and Booker [4] . Numerous publications [43][44][45][46][47] describe the use of stone columns for ground reinforcement and their potential to mitigate liquefaction.…”

Section: Methodsmentioning

confidence: 99%

Engineering of Ground for Liquefaction Mitigation Using Granular Columnar Inclusions: Recent Developments

Krishna¹,

Madhav²

2009

American J. of Engineering and Applied Sciences

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Problem statement: Liquefaction was the most hazardous damage during an earthquake. Ground improvement techniques were employed to mitigate liquefaction hazards. Most common methods to improve engineering properties of soils are densification, reinforcement, grouting/mixing and drainage. Among various remedial measures available, installation of columnar granular inclusions is the most widely adopted method for liquefaction mitigation. Approach: Columnar granular inclusions function as drains and permit rapid dissipation of earthquake induced pore pressures by virtue of their high permeability. Results: One of the chief benefits of ground treatment with granular piles is the densification of in situ ground by which the in-situ properties of the ground get modified to mitigate liquefaction potential. Further, the very high deformation modulus and stiffness of the granular pile material provide reinforcement for the in situ soil and offer another mechanism to mitigate liquefaction. The study described briefly the phenomenon of liquefaction and the associated features. A short discussion on various ground improvement methods available for liquefaction mitigation was presented highlighting the importance of columnar inclusions. Construction methods of different granular columnar inclusions like sand compaction piles/ granular piles were discussed briefly. Recent developments in the research of columnar granular inclusions as liquefaction counter measures were presented in relation to physical, numerical and analytical model studies. Conclusion/Recommendations: Columnar granular inclusions were demonstrated to be very effective for liquefaction mitigation in different case studies and research investigations.

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“…Numerous publications (e.g. Barksdale and Bachus, 1983;Munfakh et aI., 1987;Baez and Martin, 1992;and Lopez and Hayden, 1992;Brennan and Madabhushi, 2002) describe the use of stone columns for ground reinforcement and their potential to mitigate the liquefaction. Liquefied and Non-liquefied subsoil conditions of two reclaimed islands in Kobe City after the 1995 Hyogoken-Nambu earthquake were investigated by Yasuda et al (1996) who identified that subsoils treated with sand compaction piles or rod (vibro) compaction did not liquefy and nor subside even though the earthquake shaking was very strong.…”

Section: Granular Piles Installation Functions Mechanismsmentioning

confidence: 99%

Liquefaction Mitigation of Sand Deposits by Granular Piles- an Overview

Madhav

Krishna

Geotechnical Engineering for Disaster Mitigation and Rehabilitation

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Effectiveness of vertical drains in mitigation of liquefaction

Cited by 67 publications

References 4 publications

Evaluation of gravel drains and compacted sand piles in mitigating liquefaction

Evaluation of gravel drains and compacted sand piles in mitigating liquefaction

Engineering of Ground for Liquefaction Mitigation Using Granular Columnar Inclusions: Recent Developments

Liquefaction Mitigation of Sand Deposits by Granular Piles- an Overview

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