饱和松散堆积体快速滑动的剪胀效应机制与过程模拟
Shear dilatancy mechanism and process simulation of rapid sliding of saturated loose deposits
查看参考文献26篇
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文摘
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工程弃渣、地震滑坡堆积体等松散介质,在降雨条件下所形成的饱和松散堆积体具有更强的流动性,其运动速度、危害范围大大超过预期,其内在机制一直是国际学术界关注的热点问题。采用Iverson基于极限状态土力学原理构建的饱和堆积体剪胀模型,并整合到Savage-Hutter滑坡运动演进物理模型中,采用有限体积法求解滑坡运动学方程,实现了饱和松散堆积体运动演进全程模拟,最后以深圳滑坡为案例研究了滑坡运动成灾过程。结果表明:剪胀效应是导致饱和松散堆积体快速运动的主要原因,饱和松散堆积体的初始状态(孔隙比或固相体积分数)对其运动-堆积演化过程有决定性影响。 |
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其他语种文摘
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The saturated loose deposits formed by engineering waste and earthquake landslide deposits under rainfall conditions have strong mobility, their movement speeds are fast, and the damage scopes are larger than expected. Their internal mechanisms have always been a hot research issue in international academic circles. In this paper, the saturated deposit shear dilatancy model constructed by Iverson based on the limit state soil mechanics principle is integrated into the physical model of the Savage-Hutter slide motion physical model. The finite volume method is used to solve the landslide kinetic equations and achieve full simulation of the motion evolution of the saturated loose accumulation body. Finally, a back in-situ analysis of the catastrophic construction solid waste landslide that occurred in Shenzhen in December 2015 is presented and evolution process of the landslide is reproduced. The results show that the dilatancy effect is the main reason for rapid movement of the saturated loose accumulation bodies and the initial state (void ratio or volume fraction of solid phase) of the saturated loose deposit has a crucial influence on its motion-accumulation evolution process. |
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来源
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岩土力学
,2019,40(6):2389-2396 【核心库】
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DOI
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10.16285/j.rsm.2018.0407
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关键词
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饱和松散堆积体
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剪胀
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运动
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物理模型
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计算模拟
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地址
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1.
西南交通大学力学与工程学院, 四川, 成都, 610031
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中国科学院成都山地灾害与环境研究所, 中国科学院山地灾害与地表过程重点实验室, 四川, 成都, 610041
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中国科学院青藏高原研究所, 中国科学院青藏高原卓越中心, 北京, 100081
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中国科学院大学, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-7598 |
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学科
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地质学 |
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基金
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国家自然科学基金重大项目
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NSFC-ICIMOD国际合作基金项目
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四川省重点研发计划
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文献收藏号
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CSCD:6513538
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