摘要
为研究粗粒料的湿化变形性质,采用大连石灰岩通过"单线法"的三轴湿化试验对粗粒料的湿化变形性质进行研究。研究发现:湿化过程中的体变和轴变呈现线性关系,线性斜率随着围压的增大而减小;在同一围压下,湿化过程中的体变随湿化应力水平并非一直增加或减小,而是存在一个临界应力水平,在湿化应力水平小于临界应力水平时湿化体变随着应力水平增加而增加;当超过临界应力水平后湿化体变随着应力水平增加出现下降趋势。根据本次湿化试验提出一个湿化体变计算的经验公式,并通过不同的研究数据进行了公式的检验,在一定误差范围内公式能够获得较好的拟合结果具有很好的适用性。
In order to analyze the wetting deformation properties of coarse aggregate, Dalian limestone was used to study the wetting deformation properties of coarse aggregate through triaxial wetting test of "single line method". It is found that the volume change and the axial change during the humidification process show a linear relationship, and the linear slope decreases with increasing confining pressure;at the same confining pressure. The volume change during the humidification process does not always increase or decrease with the level of humidification stress, but there is a critical stress level. When the level of humidification stress is less than the level of critical stress, the volume change of humidification increases with the increase of the stress level;when the critical stress level is exceeded, humidification volume change decreases with the increase of the stress level. This humidification test proposes an empirical formula for calculating the change of the humidification volume change. The formula is tested by different research data. The formula can obtain better fitting results within a certain error range and has good applicability.
作者
姜燊燊
迟世春
JIANG Shenshen;CHI Shichun(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;Institute of Engineering Earthquake Resistance,School of Hydraulic Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)
出处
《水利与建筑工程学报》
2020年第2期137-141,163,共6页
Journal of Water Resources and Architectural Engineering
基金
国家重点研发计划(2016YFB0201001)。
关键词
湿化变形
粗粒料
大型三轴试验
湿化体变公式
wet deformation
coarse-grained material
large triaxial test
wet deformation formula
