路桥外文翻译 毕业设计

路桥外文翻译 毕业设计

ID:39583667

大小:263.00 KB

页数:14页

时间:2019-07-06

路桥外文翻译 毕业设计_第1页
路桥外文翻译 毕业设计_第2页
路桥外文翻译 毕业设计_第3页
路桥外文翻译 毕业设计_第4页
路桥外文翻译 毕业设计_第5页
资源描述:

《路桥外文翻译 毕业设计》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库

1、附录外文资料原文及翻译PorousElasticRoadSurfaceasAnUltimateHighwayNoiseMeasureS.MEIARASHIAdvancedMaterialTeam,Material&GeotechnicalResearchGroup,PublicWorksResearchInstitute,Japanmei@pwri.go.jpAbstract:HighwaytrafficnoiseinurbanareasofJapanisaseriousproblem,notonlyforresidentsalongh

2、ighways,butalsoforhighwayadministrators.Only13percentofurbanhighwayshavemettheenvironmentstandardfornoise.Noisebarrierscannotbeusedasanoisecountermeasureonthemajorityofhighwaysonwhichaccessisnotcontrolled.Noiselevelsofareasalongsomeurbanhighwaysexceedthestandardby15dB(A)

3、ormore.Thisproblemisimpedingnewhighwayconstructioninurbanareas.PorousasphaltpavementhasrecentlybeenintroducedonurbanhighwaysinJapan.Itsnoisereductioneffectof3dB(A)isinsufficient,becauseitonlyimprovesthenoiseenvironmentsatisfactionratebyafewpercent.Furthermore,thedurabili

4、tyofitsnoisereductioneffectusuallyseemstobeonlythreeyears,whichisshorterthanitslife-cycleaspavement.ThePublicWorksResearchInstitute(PWRI)has,since1993,beendevelopinganewlow-noisepavementnamed“PorousElasticRoadSurface”(PERS).Thisnewpavementhasaporousstructurecomposedofgra

5、nulaterubbermadefromoldusedtiresasitsaggregateandurethaneresinasitsbinder.Itsporosityisapproximately40percent.ThepavementwasfirstproposedinSwedeninthe1970s,however,Swedishresearchershavefailedtoimproveitasapracticalpavement.Noisereductionlevelsare15dB(A)forcarsand8dB(A)f

6、ortrucks.TheauthorestimatesthatthepotentialnoisereductionlevelsinLeqexceed10dB(A).Morethan90percentofhighwaysinurbanareaswouldmeetthestandardifthisnoisereductionlevelwereachieved.ThePWRIhasalreadysolvedseveraloftheproblemswithPERS,forexample,insufficientadhesionbetweenth

7、epavementandthebasecourse,lowskidresistance,anditspoorfireproofperformance.Itstechnicallevelhasalreadyreachedthestageoftestconstructiononurbanhighways.ThispaperexaminesthegeneralperformanceofPERSobtainedthroughpastdevelopmentatthePWRI.Italsosummarizestheresultsofrecentre

8、searchdonetofurtherimprovethenoisereductionlevelsofPERSandthefirsttestconstructionusingPERSinJapan.Thef

当前文档最多预览五页,下载文档查看全文

此文档下载收益归作者所有

当前文档最多预览五页,下载文档查看全文
温馨提示:
1. 部分包含数学公式或PPT动画的文件,查看预览时可能会显示错乱或异常,文件下载后无此问题,请放心下载。
2. 本文档由用户上传,版权归属用户,天天文库负责整理代发布。如果您对本文档版权有争议请及时联系客服。
3. 下载前请仔细阅读文档内容,确认文档内容符合您的需求后进行下载,若出现内容与标题不符可向本站投诉处理。
4. 下载文档时可能由于网络波动等原因无法下载或下载错误,付费完成后未能成功下载的用户请联系客服处理。