渗透变形过程中临空面表层土体渗透特性变化试验研究OA北大核心CSCDCSTPCD
Experimental study of permeability characteristics of surface soil during seepage and deformation
在堤基管涌发展机制的研究中,需考虑管涌通道四周破坏扰动松散层的影响.目前针对松散层渗透特性变化的定量试验数据较少.基于此,通过-维垂直向上渗流作用下均匀砂的渗透试验来研究临空面表层土体的松散过程和渗透特性变化情况.砂样垂向渗透变形发展过程中伴随着临空面表层土体松散破坏和松散层逐渐向深部扩展的过程.通过分析砂样沿程水头分布的调整变化情况得知,松散表层土体的渗透系数分布呈突变形式,即临空面松散薄层的渗透系数远大于其下松散砂层的渗透系数.由此类推,管涌…查看全部>>
The loosened zone around a pipe must be considered when the mechanism of backward erosion is investigated.However,few quantitative analyses were found in the literature regarding the permeability characteristics of the loosened zone around a pipe.The present paper focuses on the process of grain loosening and permeability changes of surface soil by sand colunn experiments subjected to upward vertical flow.The loosening top soil and downward progression of th…查看全部>>
曹洪;肖莹萍
华南理工大学土木与交通学院,广东广州510640华南理工大学亚热带建筑科学国家重点实验室,广东广州510640
建筑与水利
堤基管涌松散层渗透特性试验研究
backward erosion pipingloosened zonepermeabilitylaboratory experiments
《岩土力学》 2017 (9)
2465-2472,8
国家科技支撑计划资助项目(No.2011BAG07B02)中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室资助课题(No.Z015013).This work was supported by the National Key Technology R&D Program (2011BAG07B02) and the Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences (Z015013).
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