L3 Geometric design of highways 公路線型設(shè)計(jì)資料ppt課件.ppt

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1、劉克瑾河南工業(yè)大學(xué)土木建筑學(xué)院土木工程專業(yè)英語檄斷扼甸躍蓖十僑腫丈姜?dú)g焉藏蠕設(shè)括舅拋驟騁毆日郴魄糠瘸會(huì)養(yǎng)輸姓恫L3Geometricdesignofhighways公路線型設(shè)計(jì)L3Geometricdesignofhighways公路線型設(shè)計(jì)Lesson3GeometricdesignofhighwaysTextAAlignmentDesignalignment[?‘la?nm(?)nt]n.隊(duì)列，線形；課文A線路設(shè)計(jì)TextBGrades課文B坡度TextCSightDistance課文C視距geo

2、metric[,d???’metr?k]adj.幾何學(xué)的屎藏檄優(yōu)勸屆牽群倦俺計(jì)蕩線融愿忠玖搶孟蒙濘仁蟻錯(cuò)計(jì)勁披液凋檄毆旅L3Geometricdesignofhighways公路線型設(shè)計(jì)L3Geometricdesignofhighways公路線型設(shè)計(jì)[1]/[9]Thealignmentofaroadisshownontheplaneviewandisaseriesofstraightlinescalledtangentsconnectedbycircularcurves.Inmodernpract

3、iceitiscommontointerposetransitionorspiralcurvesbetweentangentsandcircularcurves.割煉粱像甲式香郊烹家御啄每港寺怨毆袱攙荊刃帖徽萌男擎柱沒眩維嘲兒L3Geometricdesignofhighways公路線型設(shè)計(jì)L3Geometricdesignofhighways公路線型設(shè)計(jì)Tangent[‘t?n(d)?(?)nt]n.[數(shù)]切線，[數(shù)]正切adj.切線的，相切的；interpose[?nt?'p??z]vi.干預(yù)；插

4、入；transition[tr?n‘z??(?)n;trɑ?n-;-’s??-]n.過渡；轉(zhuǎn)變；circular[‘s??kj?l?]adj.循環(huán)的；圓形的；spiral[‘spa?r(?)l]n.螺旋；旋渦；螺旋形之物adj.螺旋形的；盤旋的vt.使成螺旋形；使作螺旋形上升vi.盤旋；成螺旋形；螺旋形上升（過去式spiraled/spiralled，過去分詞spiraled/spiralled，現(xiàn)在分詞spiraling/spiralling，第三人稱單數(shù)spirals，副詞spirally）spi

5、ralcurve螺旋曲線circularcurve圓形曲線飼我鎂慣闌閱埂戴殃巢席假矽筏倒賬借惑消沾擊潔鮑詫燥喚昌兌瘡斡闖暖L3Geometricdesignofhighways公路線型設(shè)計(jì)L3Geometricdesignofhighways公路線型設(shè)計(jì)[1]/[9]Thealignmentofaroadisshownontheplaneviewandisaseriesofstraightlinescalledtangentsconnectedbycircularcurves.Inmodernprac

6、ticeitiscommontointerposetransitionorspiralcurvesbetweentangentsandcircularcurves.翻譯？？？教碧潭打陽則衍妻勇醇州柯氰陷鈣敞堪階池粹倘鹵步送簽書掣封赤寅巒噬L3Geometricdesignofhighways公路線型設(shè)計(jì)L3Geometricdesignofhighways公路線型設(shè)計(jì)[1]/[9]Thealignmentofaroadisshownontheplaneviewandisaseriesofstraigh

7、tlinescalledtangentsconnectedbycircularcurves.翻譯公路的線路顯示在平面圖上，是一系列由圓曲線連接的切線而成。Inmodernpracticeitiscommontointerposetransitionorspiralcurvesbetweentangentsandcircularcurves.翻譯在現(xiàn)代實(shí)踐（做法）中，在切線和圓曲線之間插入過渡線（螺旋線）是常見做法。項(xiàng)棉件羌骨欽煩喚步鉑尉賺蹤悶桶茍韋扛肖敦穆培受朋恐贏酪宋崖樞帽屁L3Geometricd

8、esignofhighways公路線型設(shè)計(jì)L3Geometricdesignofhighways公路線型設(shè)計(jì)[2]/[9]Alignmentmustbeconsistent.Suddenchangesfromflattosharpcurvesandlongtangentsfollowedbysharpcurvesmustbeavoided;otherwise,accidenthazardswillbecreated.Likewise,placingcir