Shaking table test study of anti-dip rock slope with complex structural plane under earthquake

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-28 DOI:10.1007/s10064-024-03968-4

Kunsheng Gu, Jian Zhou, Mingzhu Guo

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Abstract

A shaking table model test was carried out to study the failure mechanism of an anti-dip rock slope with complex structural planes. The effect of the input seismic wave frequency, types and structural plane on the slope’s dynamic response were considered. The test results show that the input seismic wave frequency is closer to the slope’s natural frequency, the acceleration amplification factor is greater. The amplification effect of input bedrock seismic waves is higher than that of soil seismic waves for rock slopes. The existence of soft-hard rock interface and tectonic fissures inhibit the slope’s amplification effect on seismic waves, and the inhibitory effect of tectonic fissures is higher than that of soft-hard rock interface. Slope displacement increases with the increase of input wave amplitude, but the change is not obvious with the increase of frequency. The time cumulative effect is more obvious under high amplitude input seismic wave for the slope’s displacement. The slope deformation and instability mode can be called ‘bending-shear slip instability’. The results of this paper are meaningful for the further understanding the dynamic failure mode of anti-dip rock slope with complex structural planes.

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地震作用下具有复杂结构平面的抗倾覆岩石边坡的振动台试验研究

为研究具有复杂结构平面的抗倾覆岩石边坡的破坏机理，进行了振动台模型试验。试验考虑了输入地震波频率、类型和结构平面对边坡动力响应的影响。试验结果表明，输入地震波频率越接近边坡固有频率，加速度放大系数越大。对于岩质边坡，输入基岩地震波的放大效应大于输入土质地震波的放大效应。软硬岩界面和构造裂隙的存在抑制了边坡对地震波的放大作用，构造裂隙的抑制作用大于软硬岩界面的抑制作用。斜坡位移随输入波幅的增大而增大，但随频率的增大变化不明显。在高振幅输入地震波作用下，边坡位移的时间累积效应更为明显。这种边坡变形和失稳模式可称为 "弯曲剪切滑移失稳"。本文的研究结果对进一步了解具有复杂结构平面的反倾岩质边坡的动态破坏模式具有重要意义。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.