许国辉,陈志远,任宇鹏,刘志钦

• 1:中国海洋大学海洋环境与生态教育部重点实验室
• 2:中国海洋大学山东省海洋环境地质工程重点实验室
• 3:中国海洋大学海洋地球科学学院
• 4:自然资源部第一海洋研究所

摘要(Abstract)：

饱和砂土液化是地震或波浪等循环动荷载作用下常见的工程地质灾害。但是，饱和砂土液化概念目前尚存在不能明确反映其发生的本质特征、对机理表述不清晰等问题。本文通过砂土液化过程分析，给出饱和砂土液化的本质原因是：在动力作用下，某些砂粒周围有冗余空间时，其向冗余空间运动的离散力大于其周围约束力，而向冗余空间产生分离运动，并由此原因引发其周围砂粒产生同样的分离运动的链式反应过程，最终使砂土呈现出离散的流动现象。通过对已有振动台实验和波浪水槽实验数据的分析，解释了对此本质原因认识的合理性。

关键词(KeyWords)： 砂土液化;动力;流化;动力流化;链式反应

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41976049)资助~~

作者(Author): 许国辉,陈志远,任宇鹏,刘志钦

DOI: 10.16441/j.cnki.hdxb.20220447

参考文献(References)：

• [1] 黄文熙.砂基和砂坡的液化研究[J].水利水电技术，1962,1:38-39.Huang W.Investigations on stability of sand foundation and slopes against liquefaction[J].Water Resource and Hydropower Engineering,1962,1:38-39.
• [2] 石原研而.土质动力学的基础[M].鹿岛：鹿岛出版社，1976:231-236.Ishihara K.Soil Dynamics Foundation[M].Kajima:Kashima Press,1976:231-236.
• [3] 谢尔盖也夫.土的液化及触变性[J].水文地质工程地质，1958,10:27-29.Sergeyev.Liquefaction and thixotropy of soil[J].Hydrogeology and Engineering Geology,1958,10:27-29.
• [4] Terzaghi K.Theoretical Soil Mechanics[M].New York:Weley,1943.
• [5] 黄文熙.水工建设中的结构力学与岩土力学问题(黄文熙论文选集)[M].北京：水利电力出版社，1984:252-256.Huang W.Some Structural and Geotechnical Problems in Hydraulic Constructions(Selected works of Huang W X)[M].Beijing:Water Power Press,1984:252-256.
• [6] 汪闻韶.饱和砂土振动孔隙水压力试验研究[J].水利学报，1962,2:37-47.Wang W.Study on pore water pressure of saturated sands due to vibration[J].Journal of Hydraulic Engineering,1962,2:37-47.
• [7] 谢定义.土动力学[M].西安：西安交通大学出版社，1988:77-79.Xie D.Soil Dynamics[M].Xi’an:Xi’an Jiaotong University Press,1988:77-79.
• [8] 张倬元，王士天，王兰生，等.工程地质分析原理(第四版)[M].北京：地质出版社，2016:221-227.Zhang Z,Wang S,Wang L,et al.Principles of Engineering Geological Analysis(Fourth Edition)[M].Beijing:Geological Publishing House,2016:221-227.
• [9] 华建新，郑建国.工程地质手册(第五版)[M].北京：中国建筑工业出版社，2018:735-736.Hua J,Zheng J.Geological Engineering Handbook(Fifth Edition) [M].Beijing:Chinese Construction Industry Publishing house,2018:735-736.
• [10] 中国社会科学院语言研究所词典编辑室.现代汉语小词典(1983年修订本)[M].北京：商务印书馆，1988:119,167.Dictionary Editing Office,Institute of Linguistics,Chinese Academy of Social Sciences.Modern Chinese Dictionary(1983 Edition) [M].Beijing:The Commercial Press,1988:119,167.
• [11] 金岳霖，汪奠基，沈有鼎，等.逻辑通俗读本[M].北京：中国青年出版社，1963:8-26.Jin Y,Wang D,Shen Y,et al.Popular Reader of Logic[M].Beijing:China Youth Publishing House,1963:8-26.
• [12] Sumer B M,Freds?e J,Christensen S,et al.Sinking/floatation of pipelines and other objects in liquefied soil under waves[J].Coastal Engineering,1999,38:53-90.
• [13] Xu X,Xu G,Yang J,et al.Field observation of the wave-induced pore pressure response in a silty soil seabed[J].Geo-Marine Letters,2021,41:13.
• [14] Wang Y,Wang Y.Liquefaction characteristics of gravelly soil under cyclic loading with constant strain amplitude by experimental and numerical investigations[J].Soil Dynamics & Earthquake Engineering,2017,92:388-396.
• [15] 姚玉相，李盛，何川，等.砂堆底部压力特性室内实验和PFC2D数值模拟分析[J].工程地质学报，2019,27(6):1281-1289.Yao Y,Li S,He C,et al.Analysis on pressure characteristics at bottom of sand heap with laboratory experiment and PFC2D numerical simulation[J].Journal of Engineering Geology,2019,27(6):1281-1289.
• [16] Sassa S,Sekiguchi H,Miyamoto J.Analysis of progressive liquefaction as a moving-boundary problem[J].Geotechnique,2001,51(10):847-858.
• [17] Liu Z,Jeng D S,Chan A,et al.Wave-induced progressive liquefaction in a poro-elastoplastic seabed:A two-layered model[J].International Journal for Numerical and Analytical Methods in Geomechanics,2009,33:591-610.
• [18] 赵田林，任宇鹏，许国辉，等.液化土在波浪作用下的运动轨迹特征试验研究[J].中国海洋大学学报(自然科学版),2019,49(S2):86-94.Zhao T,Ren Y,Xu G,et al.Experimental study on the trajectory characteristics of liquefied soil under wave action[J].Periodical of Ocean University of China,2019,49(S2):86-94.

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