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运用惰性点方法反算沥青路面结构地基模量
引用本文:张小宁,孙立军.运用惰性点方法反算沥青路面结构地基模量[J].同济大学学报(自然科学版),2004,32(1):39-42.
作者姓名:张小宁  孙立军
作者单位:1. 同济大学,交通工程系,上海,200092
2. 同济大学,道路与机场工程系,上海,200092
基金项目:教育部高等学校骨干教师基金资助项目
摘    要:在水泥混凝土路面中存在的路面弯沉盆惰性点,可以用于反算水泥混凝土路面结构模量.为此论证了惰性点在沥青路面弯沉盆中的存在性,并利用惰性点方法开发出一套反算沥青路面结构地基模量的程序.首先论证典型的沥青路面3层体系可以简化为2层体系,在此2层体系中存在惰性点.然后,通过回归分析方法得出了路面结构信息与惰性点参数的相关关系.最后通过此关系,可以在实测弯沉盆中找到惰性点,并求解地基模量.

关 键 词:沥青路面  模量反算  惰性点  弯沉盆
文章编号:0253-374X(2004)01-0039-04

Backcalculation of Subgrade Modulus for Asphalt Pavement Based on Method of Inertial Point
ZHANG Xiao-ning,SUN Li-jun.Backcalculation of Subgrade Modulus for Asphalt Pavement Based on Method of Inertial Point[J].Journal of Tongji University(Natural Science),2004,32(1):39-42.
Authors:ZHANG Xiao-ning  SUN Li-jun
Abstract:In the existing literature of pavement layer moduli backcalculation, there have been many methods developed up to date. The underlying approach is basin matching,so they all have the similar deficiency: the procedure is very difficult to converge and the solution is probably not unique. As a result of extensive calculation, it is realized that there exists a point (called the inertial point) in the surface deflection basin whose deflection does not vary with the modulus of the upper layer, provided that the subgrade modulus and the upper layer thickness remain unchanged. The relationship between the inertial point parameters and the structure information is established mathematically. Based on the relationship the inertial point in a measured deflection basin can be found straightforwardly, and the subgrade modulus can be predicted as a byproduct. The moduli backcalculation method proposed in this paper can always obtain a unique solution with the convergent procedure.
Keywords:asphalt pavement  modulus backcalculation  inertial point  deflection basin
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