不同围压下两种沥青混凝土成型试样三轴试验研究
摘要:为研究制样方法和围压对沥青混凝土力学特性的影响,进行了沥青混凝土试件的2种制样方法、4组不同围压下静三轴试验。试验结果表明:围压越高,沥青混凝土破坏强度越高,剪胀程度越小。相较于室内模拟钻芯试样,击实成型试样三轴试验应力-应变曲线的峰值强度更高,初始切线模量更大,剪胀现象更加明显;通过邓肯-张模型对试验曲线进行拟合,发现邓肯-张模型对沥青混凝土应力-应变的拟合效果并不好;邓肯-张模型不能模拟沥青混凝土的软化和剪胀现象。
Abstract:In order to study the sample preparation method and influence of cell pressure on mechanical properties of asphalt concrete specimens,two sample preparation methods conducted for asphalt concrete specimens and four group triaxial tests with different cell pressure analyzed respectively in this paper.It concludes that,the higher cell pressure results in higher failure strength of asphalt concrete,and also leads to lower sample dilatancy.Compared with indoor simulation drilling sample,the peak intensity of compaction shaping sample is higher in（σ1-σ3）-ε1 curve,the initial tangent modulus is greater,the phenomenon of shear dilatancy is more obvious.Fitting the test curve with Duncan-Chang model,indicated that the fitting effect of Duncan-Chang model on the stress-strain of asphalt concrete is not well,and Duncan-Chang model can not be simulated accurately to reflect dilatancy and softening phenomenon of asphalt concrete as well.
中文标题：
不同围压下两种沥青混凝土成型试样三轴试验研究
The Static Triaxial Test Study of Two Kinds of Asphalt Concrete Specimens under Different Cell Pressure
作者：
邹玉强1,2,幸新涪1
Zou Yuqiang1,2,Xing Xinfu1
作者简介:邹玉强：郎玉强,男,1992年生,汉族,湖北人,硕士研究生,研究方向为环境岩土工程。E-mail:zouyuqiang@live,com
通讯地址：
1. 长江科学院, 湖北武汉 430010; 2. 中国葛洲坝集团基础工程有限公司, 湖北宜昌 443002
1.YangtzeRiverScientificResearchInstitute,Wuhan430010,Hubei,China; 2.ChinaGezhoubaGroupFoundationEngineeringCo.,Ltd,Yichang443002,Hubei,China
中图分类号:TU455
doi:10.3969/j.issn.1007-2993.2017.01.004
出版物：岩土工程技术
收稿日期:2016-09-30
网络出版日期:2021-07-06
关键词:沥青混凝土,静三轴试验,邓肯-张模型,击实成型试样,室内模拟钻芯试样
Key words:asphalt concrete,static triaxial test,Duncan-Chang model,compaction shaping sample,indoor simulation drilling sample
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