飞机移动荷载作用下跑道地基响应范围变化规律
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摘要
针对目前机场场道工程设计中未考虑飞机移动荷载特性、道面结构及地基土特性与土基影响深度之间关系的状况,基于国际平整度指数IRI的飞机移动荷载计算理论和层状弹性体系理论,构建了考虑道面结构—土基—飞机移动荷载的动力分析模型。系统分析了不同道面结构和不同机型在土基顶面产生的最大附加动应力分布规律,获得了飞机移动过程中最大附加动应力横向影响范围及随深度的变化规律。研究结果为机场场道工程设计及优化提供了理论依据和参考。
The relationship among aircraft moving loads, pavement structures, characteristics of foundation soils and influence depths of soil foundations is accounted in the design of airport runways. Based on the international smoothness index and the theory of layered elastic system, a dynamic analysis model considering the moving loads of pavement structures, soil foundations and aircrafts is established. The distribution laws of the maximum additional dynamic stress on the top surface of soil foundations caused by different pavement structures and different aircraft types are systematically analyzed. The lateral influence range of the maximum additional dynamic stress and its variation with depth in the process of aircraft movement are obtained. The research results can provide theoretical basis and reference for the design and optimization of airport runways.
The relationship among aircraft moving loads, pavement structures, characteristics of foundation soils and influence depths of soil foundations is accounted in the design of airport runways. Based on the international smoothness index and the theory of layered elastic system, a dynamic analysis model considering the moving loads of pavement structures, soil foundations and aircrafts is established. The distribution laws of the maximum additional dynamic stress on the top surface of soil foundations caused by different pavement structures and different aircraft types are systematically analyzed. The lateral influence range of the maximum additional dynamic stress and its variation with depth in the process of aircraft movement are obtained. The research results can provide theoretical basis and reference for the design and optimization of airport runways.
引文
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[2]张甲峰.飞机移动荷载下饱和软黏土试验研究与长期沉降分析[D].上海:同济大学,2016.(ZHANG Jia-feng.Experimental study on saturated soft-clay and analysis of long-term settlement under aircraft loading[D].Shanghai:Tongji University,2016.(in Chinese))
[3]YAMANOUCHI T,YASUHARA K.Settlement of clay subgrades of low bank roads after opening to traffic[C]//Proceeding of 2nd Australia and New Zealand Conference on Geomechanics.Australia:Brisbane,1975:115-120.
[4]仇敏玉,俞亚南.道路行车荷载响应深度分析[J].岩土力学,2010,31(6):1822-1826.(QIU Min-yu,YU Ya-nan.Analysis of influence depth for roads induced by vehicle load[J].Rock and Soil Mechanics,2010,31(6):1822-1826.(in Chinese))
[5]赵俊明,刘松玉,石名磊,等.交通荷载作用下低路堤动力特性试验研究[J].东南大学学报:自然科学版,2007,37(5):921-925.(ZHAO Jun-ming,LIU Song-yu,SHI Ming-lei,et al.Experimental study on dynamic response of low embankment under traffic load[J].Journal of Southeast University:Natural Science Edition,2007,37(5):921-925.(in Chinese))
[6]LEDBETTER R H.Pavement response to aircraft dynamic loads[R].United Army Engineer Waterways Experiment Station Soils and Pavement Laboratory,1976.
[7]张甲峰,黄茂松,张根宝,等.往复荷载下层状地基基础与沉降分析[J].土木工程学报,2010,43(11):122-129.(ZHANG Jia-feng,HUANG Mao-song,ZHANG Gen-bao,et al.Test and analysis for settlement of plates on elastic foundation under repeated loading[J].China Civil Engineering Journal,2010,43(11):122-129.(in Chinese))
[8]周健斌,魏金霞,李国强.交通动荷载模拟试验成果分析[J].公路与汽运,2005(4):32-34.(ZHOU Jian-bin,WEIJin-xia,LI Guo-qiang.Analysis of simulation experimental results of traffic dynamic load[J].Highways&Automotive Applications,2005(4):32-34.(in Chinese))
[9]黎冰,高玉峰,魏代现,等.车辆荷载的影响深度及其影响因素的研究[J].岩土力学,2005,26(增刊):310-313.(LIBing,GAO Yu-feng,WEI Dai-xian,et al.Research on influencing depth of vehicle loads and its influencing factors[J].Rock and Soil Mechanics,2005,26(S0):310-313.(in Chinese))
[10]CHAI J C,MIURA N.Traffic-load-induced permanent deformation of road on soft subsoil[J].Journal of Geotechnical and Geoenvironmental Engineering,2002,128(11):907-916.
[11]梅英宝,朱向荣,吕凡任.交通荷载作用下道路与软土地基弹塑性变形分析[J].浙江大学学报(工学版),2005,39(7):997-1002.(MEI Ying-bao,ZHU Xiang-rong,LüFan-ren.Elastoplastic deformation analysis of pavement and soft subsoil under traffic load[J].Journal of Zhejiang University(Engineering Science),2005,39(7):997-1002.(in Chinese))