公路别业设计外文文献

公路别业设计外文文献

ID:9816989

大小:36.50 KB

页数:6页

时间:2018-05-10

公路别业设计外文文献_第1页
公路别业设计外文文献_第2页
公路别业设计外文文献_第3页
公路别业设计外文文献_第4页
公路别业设计外文文献_第5页
资源描述:

《公路别业设计外文文献》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库

1、毕业设计/论文外文文献翻译院系城市建设学院专业班级土木工程0803姓 名胡求实原文出处EnglishforCivilEngineering评分指导教师华中科技大学武昌分校20年月日5RoadEngineeringWhenwespeedalongamodernhighway,werarelystoptothinkwhatitisweareridingon.Inorderthateconomicactivitycantakeplace,people,goodsandmaterialsmustmovefromplacetoplace.Thenece

2、ssarymovementhastosomeextentalwaysbeenpossible,butthegrowthineconomicactivityplaceddemandsonthetransportsystem.Thissystemdevelopedtomeetthenewneedsmuchmorerapidlythanithadpreviously,theeconomyexpandedfurther,generatingmoretraffic,andinthisinteractivewaywereproducedcanalsand

3、turnpikeroads,thenrailwaysandmostlatterlyanetworkofmodernroads.Almostallroadsarebuiltintwoormorelayers,orcourses,ofrocksorstone.Thebottomlayeris10or20centimetersthickandusuallymadeupoflargerstones.Theuppercoursehassmallerstonesandisabout8cmthick.Thesurfacelayerofroadmustwit

4、hstandtheweightofheavyvehicles.Itmustalsopreventwaterfromseepingintotheroadbedanddestroyingit.HowIsaModernRoadBuiltThefirststepinbuildingaroadistoplantheroute,andsometimestheroutehasbeendecidedbythenatureoftheland.Thenthedetailsareplanned:thewidthofthehighway,thenumberofdri

5、vinglanes,thenumberandlocationofentrancesandexits,andtheessentialstrengthoftheroad.Allthesedependontheamountoftrafficthatisexpected.Modernroadsareusuallyplannedforthenext20years'traffic.Thenextstepisthetestingoftheearthfoundationonwhichtheroadistorest.Engineerscarefullystud

6、ythesoiltolearnhowsoliditis,howmuchmoistureitcontains,andhowwellitdrains.Thentheydecidehowthesoilshouldbepreparedandpackedtoprovideagood,sturdyfoundation,orroadbed.Properdrainageisessentialinroadbuilding,becauseifthefoundationbecausesoggy,theheavyroadwouldsinkintoit.Andifth

7、ewaterweretofreezeintheground,itwouldexpandandcracktheroad.Therearetwobasicstepsinthesolutionofsurface-drainageproblems:hydrologicanalysisandhydraulicdesign.Agooddrainagedesigninvolvesanaccuratepredictionofthemagnitudesofpeakratesofrunoff.2Aclosecorrelation5betweenthesetwob

8、asicpartsisnecessaryinordertoarriveatabalanceddesignwherebycostscanbeweighedagains

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。