Research Progress on Determination of Resilient Modulus of Subgrade Soils in U．S．

doi:10.3969/j.issn.1674-0696.2012.04.15

Abstract

Abstract: Resilient modulus of subgrade soils，representing the mechanical parameters of subgrade soils strength，is the main design parameter for the pavement design． It plays an important role in pavement surface deflection pavement designed thickness． The research progress of the laboratory test methods of dynamic resilient modulus of subgrade soils，constitutive models and field experiment methods in U． S． has been reviewed． Comments on current research status and future research directions were presented．

Key words: subgrade soils, resilient modulus, repeated load triaxial laboratory tests, constitutive models, falling weight deflectometer ( FWD)

摘要： 路基土回弹模量是表征土基强度的力学参数，是路面结构设计的主要参数，对路表弯沉和路面设计层厚度的确定有很大的影响。回顾了美国地区路基土动态回弹模量室内试验方法、预估本构模型及室外试验方法的最新研究进展，并对其做了评述，指出了研究发展方向。

关键词: 路基土, 回弹模量, 重复加载三轴试验, 本构模型, 落锤式弯沉仪

CLC Number:

U416.03

Zhang Xiao,Zhao Dui-jia,Liu Shao-wen,Shen Jun-min. Research Progress on Determination of Resilient Modulus of Subgrade Soils in U．S．[J]. Journal of Chongqing Jiaotong University(Natural Science), 2012, 31(4): 795-798.

张翛,赵队家,刘少文,申俊敏. 美国路基土回弹模量确定方法研究现状[J]. 重庆交通大学学报（自然科学版）, 2012, 31(4): 795-798.

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