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为了探究运营期平衡湿度条件下公路路基路面动态回弹模量的变化规律,通过理论计算,得出不同重载条件下满足弯沉等效的优化路基路面结构;利用有限元分析软件建立模型进行数值模拟分析,通过模拟历经降雨及地下水渗流的过程来等效平衡湿度条件,分析运营期平衡湿度条件下路基路面结构动态回弹模量和弯沉值的变化规律。结果表明:随着降雨强度的增加、历时时间的延长和地下水位的上升,弯沉值呈增大趋势,而动态回弹模量呈线性降低趋势。相对于优化前的路基路面模型,优化后模型的动态回弹模量显著提升,验证了重载条件下基于弯沉等效设计路基路面结构的可行性。
Abstract：To investigate the variation of dynamic resilience modulus of highway subgrade pavement under the equilibrium humidity condition during operation,the optimized subgrade and pavement structure satisfying deflection equivalent under different heavy load conditions was obtained,Through theoretical analysis,a model was established by finite element analysis software for numerical simulation.Through simulating the process of rainfall and groundwater seepage to equivalent equilibrium humidity conditions,it analysed the change rule of dynamic resilience modulus and deflection value of the subgrade pavement structure under the equilibrium humidity in the operation period.The results showed that the deflection value increased and the dynamic resilience modulus linearly decreased with the increase of rainfall intensity,duration time and groundwater level,respectively.Compared with the subgrade pavement model before optimization,the dynamic resilience modulus of subgrade pavement model after optimization significantly increased,which verified the feasibility of subgrade pavement structure design based on deflection equivalent under heavy load conditions.
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基本信息:
DOI：10.16468/j.cnki.issn1004-0366.2025.02.005
中图分类号:U416.01
引用信息:
[1]宋帅,张羽,王贺等.平衡湿度下基于弯沉等效的路基路面动态回弹模量研究[J].甘肃科学学报,2025,37(02):28-36.DOI:10.16468/j.cnki.issn1004-0366.2025.02.005.
基金信息:
国家自然科学基金(52079078); 国家重点研发计划(2022YFE0104600)