AASHTO 2002无粘结材料层的回弹模量预测方法

在总结前期预测模型的基础上，AASHTO2002设计指南建立了水一无粘结材料回弹模量预测模型。该模型作为强化综合气候模型（EICM）的重要组成部分，用来评价环境因素对公路长期性能的影响。10种公路长期性能研究（LTPP）试验路段的观测结果验证了这种预测模型的可靠性。研究结果也发现，回弹模量的季节性变化幅度（对于非霜冻影响的地区）一般是很小的，小于最初（最佳夯实）状态到平衡状态的变化幅度。介绍了无粘结材料层的长期回弹模量的计算方法，以期对我国高速公路设计与研究起到借鉴作用。

Prediction Method of the Resilient Modulus of Unbound Materials in AASHTO 2002

A revised predictive model of the resilient modulus of unbound materials is developed in AASHTO Mechanistic-Empirical Design Guide 2002 based on several parallel base and subbase materials studies.This model is used to estimate or compute long term pavement performance(LTPP) as an important component of enhanced integrated climatic model(EICM).A Study of 10 LTPP sites says that the changes in resilient modulus of unbound layers with changes in moisture is approached to the predictions.The results also show that the seasonal variations in MR(for non frost affected zones) are typically fairly small,and much smaller than the effect of change in moisture from the initial(optimum compaction) conditions to the final equilibrium condition.In the end the paper provides a calculation proceeding of long term resilient modulus of unbound materials as a reference to design or research of expressway in our country.