Centrifuge Modeling of Rock-Fill Embankments on Deep Loose Saturated Sand Deposits Subjected to Earthquakes

Peiris, Lmn; Madabhushi, Spg; Schofield, A. N.

doi:10.1061/(asce)1090-0241(2008)134:9(1364)

Cited by 16 publications

(8 citation statements)

References 6 publications

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“…& Individual rock penetration into the underlying liquefied soil was observed as predicted by Peiris et al (2008) with liquefied soil flowing around individual rocks. This is akin Imaging the failure of a rock-fill dam following liquefaction Heron, Lam, Haigh and Madabhushi to a bottom trap-door type mechanism and leads to an increased overall settlement of the rock-fill dam.…”

Section: Discussionmentioning

confidence: 90%

“…Researching the failure of rock-filled dams has been an area of interest at the University of Cambridge for several years (Heron, 2009;Howe, 2008;Lam, 2010;Peiris et al, 2008). However, four specific tests will be discussed in this paper which allows an understanding of the failure mechanism to be developed.…”

Section: Experimental Programmementioning

confidence: 99%

“…Not only has there been settlement of individual pebbles into the underlying sand as detailed by Peiris et al (2008), but the entire embankment has also slumped and displaced sand on either side of the embankment upwards. Hence, there are two separate failure mechanisms influencing the response of the embankment: localised bearing failures under pebbles causing them to penetrate into the liquefied sand and a global bearing failure causing the entire embankment to displace the underlying sand outwards towards the liquefied free-field region.…”

Section: Rock-fill Embankmentmentioning

confidence: 99%

“…As detailed by Peiris et al (2008), the zone directly under each pebble will not fully liquefy owing to the presence of the overburden stress provided by the pebble. However, in the gaps between the pebbles, the sand will reach a comparatively more liquefied state.…”

Section: Rock-fill Embankmentmentioning

confidence: 99%

“…Rock-fill dams, on the other hand, will locally apply stress to the volume of sand directly under each rock leaving small unstressed wedges between the rocks. The importance of these unstressed soil wedges was identified by Peiris et al (2008) who conducted centrifuge tests on rock-fill embankments. It was found that gravel penetration at the toe of the embankment caused instability in the outer slopes resulting in lateral spreading.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Imaging the failure of a rock-fill dam following liquefaction

Heron¹,

Lam²,

Haigh³

et al. 2013

Dams and Reservoirs

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Rock-fill dams are popular in developing countries due to their ease of construction and use of local materials. They are used to store water and to provide flood defences. The presence of such dams in earthquake-prone regions poses risks, particularly from ground liquefaction. In this paper, results from physical model tests on dams with different configurations are presented. Model dams with impermeable cores including sheet pile walls and clay cores were tested and the effect of reservoir water was investigated. High-speed photography was used to capture the response of the model dams allowing the movement of foundation soil below the dam to be established. It is concluded that the stiffness of the impermeable core has a significant influence on the ultimate deformation of the dam. The presence of reservoir water led to increased downstream movements of the dam and differential settlements between the upstream and downstream sides.

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Section: Discussionmentioning

confidence: 90%

Section: Experimental Programmementioning

confidence: 99%

Section: Rock-fill Embankmentmentioning

confidence: 99%

Section: Rock-fill Embankmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Imaging the failure of a rock-fill dam following liquefaction

Heron¹,

Lam²,

Haigh³

et al. 2013

Dams and Reservoirs

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show abstract

Vibration compaction characteristics of rock filling embankment

Yang

Liu

Zhao

2009

J. Cent. South Univ. Technol.

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The dynamic model experiment of the rock filling embankment was carried out to investigate the vibration compaction mechanism. The rock filling materials were compacted by the plate-vibrated compactor, and the characteristics of the rock filling materials, such as settlement, pressure change and response waveform, were measured by the dynamic earth pressure gauge and accelerometer. Moreover, a new method for detecting the compactness of the rock filling embankment was proposed based on the maximum dry density and modulus of deformation. The results show that the process of vibration compaction includes compact, elastic deformation and loose stages, and the vibratory pressure transfers to the surroundings from the vibration center in non-linear rule. Furthermore, the test results obtained by the present method are basically in agreement with those obtained by the traditional method, and the maximum relative error between them is about 0.5%.

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The effects of surcharge on liquefaction resistance of silty sand

Shooshpasha

Bagheri

2012

Arab J Geosci

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Centrifuge Modeling of Rock-Fill Embankments on Deep Loose Saturated Sand Deposits Subjected to Earthquakes

Cited by 16 publications

References 6 publications

Imaging the failure of a rock-fill dam following liquefaction

Imaging the failure of a rock-fill dam following liquefaction

Vibration compaction characteristics of rock filling embankment

The effects of surcharge on liquefaction resistance of silty sand

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