现行中美民用机场刚性道面设计方法对比分析

运用现行中国民航总局的刚性道面设计方法(力学经验法)与美国联邦航空局(FAA,Federal Aviation Administration)的刚性道面设计方法(FAARFIELD法),在两种单一飞机条件下,分别对不同基层厚度、面层设计强度、交通量的情况进行刚性道面面层的厚度设计,对得出的54组数据进行对比分析;同时,为反映机场实际交通情况,拟定两组多种飞机进行设计对比。结果表明:在单一飞机条件下,民航总局力学经验法的面层设计厚度明显大于FAA的FAARFIELD法,厚度差值随基层厚度和面层设计强度的增加而增加,随交通量的减小而减小;在多种飞机条件下,民航总局的力学经验法面层设计厚度亦明显大于FAA的FAARFIELD法,中国现行民航机场刚性道面设计方法趋于保守。另外,中国机场设计方法计算繁琐,受制于板边弯矩影像图,精确度受到一定影响,建议引入计算机程序和三维有限元理论。

Rubblization: A Practical, Cost Effective and Sustainable Option for Repairing Deteriorated Airfield Pavement in the Empty Quarter Desert of Saudi Arabia

Rubblization technique has been extensively used to repair the damaged concrete pavement and has proven successful in developed countries like the US and Europe. It has not been fully adopted in developing region like the Middle East and this paper presents the design and construction challenges posed while assessing damaged concrete runway in empty quarter of Saudi Arabia. A number of design options for repairs for runway pavement were considered and rubblization was chosen as a preferred option for repair. This paper includes the consideration for the assessment and adoption of the concrete rubblized modulus value using the falling weight deflectometer, optimization of the tests for the whole runway using the Heavy Weight Deflectometer HWD testing to replace pits, safely working around the utilities, reasonable assumption of drop height of the pavement and installation of utility conduits in the rubblized layer. Findings of the paper demonstrates resolving technical issues which are not very well covered in the Federal Aviation Authority (FAA) EB-66 such as the additional test strips, minimum areas of rubblization for assessment using test pits, drop in the height of concrete surface and fixing of utilities in rubblized pavement. The case study demonstrates that the rubblization can be successfully carried out in remote locations like empty quarter of Saudi Arabia with carefully carried out detailed site investigations, adopting correct assumed design rubblization modulus, quality control using HWD, protection of utilities while rubblizing and use of polymer modified asphalt for successful project deployment.

机场水泥混凝土道面厚度的确定方法比较

随着国际化合作在民航工程建设领域的不断加强,我们接触到的国外机场建设项目也会越来越复杂,等级也越来越高,相应的设计要求也会越来越严格。在国际合作背景下的机场飞行区设计存在着标准和规范上的差异,标准的差异必然对项目的设计和施工带来影响。因此,对于国内外飞行区道面结构的计算方法的比较非常必要,在寻找差异的同时,对设计方法的比较和结合能够完善设计思路,提升设计成果的合理性。研究目的:(1)结合收集整理的国内外不同方法计算道面水泥混凝土厚度的算例,比较分析我国规范和FAA框架下机场道面结构计算的差异;(2)依据不同计算方法获得的道面结构结果,比较两种规范设计的侧重点以及道面结构承载力的影响;(3)验证不同规范下计算所得道面结构是否能够互相满足要去,分析两种计算方法兼容性。研究内容简介:本次研究内容主要为理论计算研究,对国内外机场刚性道面结构层厚度理论计算方法进行比较。(1)运用现行中国民航总局的刚性道面设计方法(力学经验法)与美国联邦航空局(FAA,Federal Aviation Administration)的刚性道面设计方法(FAARFIELD法),在两种飞机运行荷载情况下,对不同情况下机场水泥混凝土道面设计结果进行对比分析;同时,为反映机场实际交通情况,拟定两组多种飞机进行设计对比。(2)通过对公司相关国际合作项目设计项目的整理,分析两种框架下的机场刚性道面结构层计算结果,总结差异性和兼容性。