Centrifuge modeling of municipal solid waste landfill failures induced by rising water levels

Chen, Yunmin; Li, Junchao; Yang, Chen; Zhu, Bin; Zhan, Liangtong

doi:10.1139/cgj-2017-0046

Cited by 40 publications

(14 citation statements)

References 31 publications

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“…A fast flow of soil is initiated from the top of the slope with high degree of saturation under such heavy rainfall. The short duration of torrential rainfall also causes the increase in water level at the toe, which may contribute to the loss of suction in the slope soil [5]. It is believed that a uniform infiltration deep into the slope body has not yet been established during such a short time.…”

Section: (A) (B)mentioning

confidence: 99%

A device for rainfall simulation in geotechnical centrifuges

Wang

Idinger

2021

Acta Geotech.

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Rainfall-induced slope instabilities are ubiquitous in nature, but simulation of this type of hazards with centrifuge modelling still poses difficulties. In this paper, we introduce a rainfall device for initiating slope failure in a medium-sized centrifuge. This rainfall system is simple, robust and affordable. An array of perforated hoses is placed close above the model slope surface to generate the raindrops. The rainfall intensity depends on the centrifuge acceleration and the flow rate of the water supply, which is controlled by the size and number of the tiny pinholes in the hose walls. The rainfall intensities that are tested range from 2.5–30 mm/h, covering the intensity range of moderate, heavy and torrential rainfall events. Our model test with rainfall-induced slope failure shows that this system is capable of generating relatively uniform rainfall of wide intensities and leads to various patterns of slope failure.

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Section: (A) (B)mentioning

confidence: 99%

A device for rainfall simulation in geotechnical centrifuges

Wang

Idinger

2021

Acta Geotech.

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“…Its loading capacity is 0.5 ton. The seismic waves were applied to the model in the horizontal direction through the shaking table, which had a maximum acceleration capacity of 40g (Chen et al 2017;Zhou et al 2018). The advantage of the centrifuge is that it allows the use of reduced-scale models to realise full-scale stress conditions.…”

Section: Test Instrumentationmentioning

confidence: 99%

Seismic Performance of Deposit Slopes With Underlying Bedrock Before and After Reinforcement by Stabilising Piles

Sun

Kong

Bai

et al. 2021

Preprint

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The seismic performance of stabilising piles used to reinforce underlying bedrock in a deposit slope is a complex soil-structure interaction problem, on which there is limited design guidance on the optimum use of a single row of rock-socketed piles to reinforce such slopes. Two centrifuge shaking-table model tests at a geometric scale of 1:50 were conducted to ascertain the dynamic responses of the underlying bedrock deposit slopes without and with the use of stabilising piles during an earthquake. Multi-stage seismic waves with various peak accelerations were applied from the bottom of each model. Under seismic excitation, the differences in the response accelerations between the deposit and bedrock increase significantly with the increase in amplitude of the input seismic waves. The two are prone to uncoordinated movement, which leads to slope instability. Setting stabilising piles reduces the crest settlement and angular deformation and changes the natural frequency of the slope crest. The presence of the rock-socketed stabilising piles can bridge the uncoordinated movement of the bedrock and the overlying deposit to some extent. According to the mobilised pile bending moment, shear force, lateral pile-soil load distribution, and pile displacement, the dynamic response characteristics of stabilising piles under continuous multi-level seismic excitation were analysed. The resultant force arising from a distributed load increment on the piles caused by an earthquake is mainly concentrated in the upper part (the point of action of the resultant force is 1.54m below the slope surface). With increases in the peak ground acceleration (PGA) of the input motion, the resistance of the bedrock in front of the stabilising piles increases; moreover, with the increase of PGA, the peak resistance under the bedrock surface of the stabilising piles gradually moves downwards. This finding indicates that the strong seismic motion significantly changes the embedded working state of the stabilising pile.

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“…Its loading capacity is 0.5 ton. The seismic waves were applied to the model in the horizontal direction through the shaking table, which had a maximum acceleration capacity of 40 g [38,39]. The advantage of the centrifuge is that it allows the use of reduced-scale models to realize full-scale stress conditions.…”

Section: Test Instrumentationmentioning

confidence: 99%

Seismic Performance of Deposit Slopes with Underlying Bedrock before and after Reinforcement by Stabilizing Piles

et al. 2021

View full text Add to dashboard Cite

The seismic performance of stabilizing piles used to reinforce underlying bedrock in a deposit slope is a complex soil–structure interaction problem. Two centrifuge shaking table model testswere conducted to ascertain the dynamic responses of the underlying bedrock deposit slopes without and with the use of stabilizing piles during an earthquake. Multi-stage seismic waves with various peak accelerations were applied from the bottom of each model. The differencesin the response accelerations between the deposit and bedrock increase significantly with the increase in amplitude of the input seismic waves. The presence of the rock-socketed stabilizing piles can bridge the uncoordinated movement of the bedrock and the overlying deposit to some extent. The resultant force arising from a distributed load increment on the piles caused by an earthquake is mainly concentrated in the upper part. With increases in the peak ground acceleration of the input motion, the resistance of the bedrock in front of the stabilizing piles increases and the peak resistance under the bedrock surface of the stabilizing piles gradually moves downwards.This finding indicates that the strong seismic motion significantly changes the embedded working state of the stabilizing pile.

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Centrifuge modeling of municipal solid waste landfill failures induced by rising water levels

Cited by 40 publications

References 31 publications

A device for rainfall simulation in geotechnical centrifuges

A device for rainfall simulation in geotechnical centrifuges

Seismic Performance of Deposit Slopes With Underlying Bedrock Before and After Reinforcement by Stabilising Piles

Seismic Performance of Deposit Slopes with Underlying Bedrock before and after Reinforcement by Stabilizing Piles

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