A Comparative Study of the Seismic Performances and Failure Mechanisms of Slopes Using Dynamic Centrifuge Modeling

Cheng, Hualin; Zhou, Jiamin; Chen, Zhiyi; Huang, Yu

doi:10.1007/s12583-021-1481-4

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…In the 2013 Lushan earthquake, thousands of landslides were triggered due to the earthquake [11]. To explore the damage effects of different seismic parameters on the rock and soil mass, Cheng et al, [12] studied the effect of different seismic input amplitudes on the seismic performance of slopes based on a centrifuge model test. Xu et al [13] conducted a uniaxial compression test on hard rock and found that the loading rate has an important effect on the strength and deformation characteristics of the rock mass.…”

Section: Introductionmentioning

confidence: 99%

Slope Stability and Effectiveness of Treatment Measures during Earthquake

Zhou

Wang

et al. 2023

Sustainability

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Slopes are prone to instability during earthquakes, which will cause geological disasters such as landslides and pose a great threat to people’s lives and property. Therefore, it is necessary to analyze the stability of slopes and the effectiveness of treatment measures during earthquakes. In this study, an actual slope in the creeping slide stage was selected and located in an area where earthquakes occur frequently. Once the slope experiences instability, it will produce great damage. Therefore, a finite difference program, Fast Lagrangian Analysis of Continua in Two Dimensions (FLAC2D), was employed in the numerical simulation to explore the stability of the slope before and after treatment under earthquake action. Different from previous studies, this study explores the effectiveness of various treatment measures on slope stability during earthquake. The computed results show that the stability of the slope is greatly influenced by earthquakes, and the slope displacement under seismic conditions is far larger than that under natural conditions. Three treatment measures, including excavation, anti-slide piles, and anchor cables, can significantly reduce slope displacement and the internal force on anti-slide piles, and improve the stability of a slope during an earthquake. This will provide a valuable reference for the strengthening strategies of unstable slopes. The analysis technique as well as the derived insights are of significance for slope stability and the effectiveness of treatment measures.

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Section: Introductionmentioning

confidence: 99%

Slope Stability and Effectiveness of Treatment Measures during Earthquake

Zhou

Wang

et al. 2023

Sustainability

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“…Because of those reasons, the 1 g shaking table tests can hardly simulate the phenomenon observed in the field, e.g., sand boiling [15], mudflows along the downstream slope of the starter dam [15,16], and the topographic features, e.g., terraces and scarps of the tailings left in place after failure [12][13][14]. As the in situ stress field can be reproduced in the centrifuge, centrifuge shaking table tests are believed to be more efficient and advantageous [34][35][36][37][38]. However, there is lack of such kind of experimental results.…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of the Seismic Responses of Silt-Interlayered Stratified Sandy Tailings Slopes Using Centrifuge Shaking Table Tests

Zhang

2022

Advances in Materials Science and Engineering

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This study aims to characterize the seismic responses of silt-interlayered stratified sandy tailings slopes. In order to achieve this, a series of model tests were carried out in an advanced centrifuge shaking table. The experimental results demonstrate that sandy tailings slopes interlayered with silts are more prone to flow failure compared with homogeneous slopes. The failure process of a steep silt-interlayered sandy slope is further elaborated in detail, and two modes of tailings release have been identified. The initial loading cycles may only lead to localized deformation near the relatively shallow silty layer; however, there is continuous build-up of excess pore water pressure in deeper sandy tailings. With increasing the number of loading cycles, more sandy tailings start to spread laterally, and ejection of tailings may occur. After ejection, the excess pore pressure turns to dissipate, while the tailings near slope crest become liquefied and then flow toward the downstream direction layer by layer, leading to tailings release. This is the first mode of tailings release. Due to the continuous lateral spreading, the displaced tailings eventually arrive at the crest of the starter dam and then flow along its slope at the downstream side, leading to tailings release. This is the second mode of tailings release. Those unique and invaluable observations can be used to improve the seismic design of tailings impoundments and to validate associated numerical methods.

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“…Based on the dynamic centrifugal model test, Cheng et al (2021) studied the seismic performance of a sand slope with different ground motion inputs and different slope angles. The effects of the slope angle on the slope ground acceleration, ground motion amplification coefficient and predominant period were revealed.…”

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confidence: 99%

Preface to the Special Issue on Geo-Disasters

Xu¹,

Xu²,

Huang

2021

J. Earth Sci.

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Exploring the mechanism of natural disasters and fighting against natural disasters are the eternal themes for human survival and development. Geo-disasters are one kind of natural hazards, including landslides, debris flows, earthquakes, liquefactions, which can result in serious causalities and economic loss. Therefore, geo-disaster prevention and reduction has been a grand research topic for many decades and a large number of achievements have been made in detection, monitoring, early warning and risk assessment of geo-disasters (

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A Comparative Study of the Seismic Performances and Failure Mechanisms of Slopes Using Dynamic Centrifuge Modeling

Cited by 9 publications

References 32 publications

Slope Stability and Effectiveness of Treatment Measures during Earthquake

Slope Stability and Effectiveness of Treatment Measures during Earthquake

Experimental Characterization of the Seismic Responses of Silt-Interlayered Stratified Sandy Tailings Slopes Using Centrifuge Shaking Table Tests

Preface to the Special Issue on Geo-Disasters

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