水泥混凝土路面板模量反算的一种新方法──惰性弯沉法

A NEW METHOD TO BACKCALCULATE LAYER MODULI FOR CONCRETE PAVEMENTS

路面结构层模量反算方法有多种，但都因反算解的唯一性问题而使反算结果误差太大。为了提高反算精度，本文提出了“惰性点”的概念。发现在混凝土路面的弯沉盆上，存在一个其弯沉值几乎不随面层模量变化而改变的点，该点即被定义为惰性点。该点的发现，为唯一确定路面结构层模量提供了理论基础。

Microcomputer methods have been widely used to backcalculate pavement layer moduli from deflections measured on the pavement surface. In order to increase the precision of the backcalculated moduli, a new concept, i. e. inertial porint is found on deflection basin of concrete pavements. The inertial point is defined as the point at which the deflection is almost independent of the slab modlus. Thus, it is a critical parameter for uniquely determining the foundation reactihon modulus and for further backcalculating the slab modulus. Based on the new concept, a new layer moduli backcalculation method has been developed for concrete pavements.This method has been used to evaluate the structure condition of concrete pavement of an in-service airport, and the effectiveness of the method is verified as a result.