级配碎石回弹变形特性.pdf

第27卷第6期 2007年11月长安大学学报(自然科学版)Journal of Chang'an University (Natural Science Edition)Vol. 27 Nov. No. 62007文章编号:1671-8879(2007)06-0029-05级配碎石回弹变形特性袁峻‘,黄晓明2(,江苏扬州225009; ,江苏南京210096)摘要:级配碎石具有非线性的应力一应变特性,回弹模量是有效描述这一特性的参数,通过室内动三轴试验能够得到较好的模拟级配碎石回弹模量的模型。分析了影响级配碎石回弹变形特性的各种因素,并进行了试验验证。通过数据拟合发现,Uzan模型能更好地反映级配碎石的非线性回弹变形特性,且模型中的回归参数与级配中小于0. 075mm筛孔的质量分数有一定的关联性。并针对影响级配碎石回弹模量的两个重要参数:级配中小于’0. 075mm筛孔的质量分数和含水质量分数,提出相应的取值范围建议。关键词:道路工程;级配碎石;动三轴试验;回弹模量模型;影响因素;回归参数中图分类号:U416. 214文献标志码:AResilient deformation behavior of unbound stone aggregatesYUAN Jun',HUANG Xiao-mingz(1. School of Architecture and Engineering, Yangzhou University, Yangzhou 2250092. School of Transportation, Southeast University, Nanjing 210096,Jiangsu,Jiangsu, China;,China)Abstract: The unbound stone aggregates have a nonlinear stress-strain behavior, the resilientmodulus can describe this character effectively, the resilient modulus model can be attainedthrough dynamic load triaxial test. The affecting factors of the resilient deformation behavior ofunbound stone aggregates are analyzed with dynamic load triaxial test. The result shows that theUzan model can display nonlinear resilient deformation behavior of unbound stone urately, and the regression coefficient has relationship with 0. 075 mm passing percent. Thesuggested scope of two important design parameters, 0. 075 mm passing percent and waterc