水泥混凝土路面设计新旧规范对比分析

以普通水泥混凝土路面设计为例,比较分析新、旧规范方法下,面层设计厚度的差异。从定性分析新规范主要修订内容入手,通过对设计各环节实际算例的计算比较,找到产生差异的原因,并将结果汇总到面层厚度设计的实例中,得出在交通荷载和筑路材料等外部条件相同的情况下,新规范方法设计厚度较之旧规范薄2~3 cm的结论。基层顶面当量回弹模量修正方法的改变是产生差异最为主要的原因。此外,基垫层材料模量的取值也对面层设计厚度影响显著,应结合工程实际慎重取值。

Analysis and Comparison of Specifications for Cement Concrete Pavement Design

Take the plain concrete pavement out the differences of thickness of surface design design for example, the comparison is carried out to find between the two sets of specifications. First qualitative analysis is done on the content of the emendation of the newer specification. Then the reasons that bring on the differences are found through the calculation of the samples from the stages of design process. Finally all the results are put into the sample of surface design. It is concluded that the thickness of surface designed by newer specification is thinner than that of older one by about 2-3 cm, in the case of the identical circumstances, such as traffic loads, materials, etc. The variation of the correction method for base equivalent resilient modulus is the main reason which brings on the difference; besides, the value of the base material modulus has remarkable impact on the thickness of surface design, so it is reasonable to set it cautiously conforming to the fact.