中美机场水泥混凝土道面加铺厚度设计方法对比分析

Comparative Analysis of Overlay Thickness Design for Sino-American Airport Cement Concrete Pavement

通过计算不同荷重级别的设计飞机类型(波音-737、空客-300、波音-747)、不同厚度和模量的既有道面结构(面层、基层)、不同既有道面条件(主要状况为轻微或严重损坏)、不同加铺类型(水泥混凝土、沥青层)等256种工况下的加铺层厚度,对中国民航机场道面设计规范中既有水泥混凝土道面加铺设计方法与美国联邦航空管理局、陆军工程兵团、Rollings等加铺设计方法进行对比分析。结果表明,在繁重交通荷载作用下加铺水泥混凝土时,我国民航设计方法厚度在既有水泥道面结构较强计算结果相对保守;加铺沥青层时,在既有水泥道面结构不强时计算结果较为保守,不符合经验预估范围。其它工况下与其它方法厚度设计结果相差不大。

For overlay design of airport pavement, this paper compares and analyzes methods of overlay thickness design between Civil Aviation Administration of China（CAAC） and the U.S.A Corps of Engineers, the U.S.A Federal Aviation Administration（etc.） by calculating thickness value of overlay under more than 256 working conditions, including different designing aircraft（Boeing-737, Airbus-300 and Boeing-747）, different existing pavement conditions（mainly slight, or serious damage）, different overlay types（cement concrete or asphalt concrete）. Results show that value for cement concrete overlay calculated by CAAC is a little more conservative when existing pavement is strong. However, for asphalt concrete overlay, CAAC＇s value is apparently conservative and not in correspondence with the experience estimates when existing pavement is not strong enough. No apparent thickness values in different overlay thickness designs can be figured out under the other conditions.