L3 Geometric design of highways 公路线型设计资料ppt课件.ppt

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1、刘克瑾河南工业大学土木建筑学院土木工程专业英语檄断扼甸跃蓖十侨肿丈姜欢焉藏蠕设括舅抛骤骋殴日郴魄糠瘸会养输姓恫L3Geometricdesignofhighways公路线型设计L3Geometricdesignofhighways公路线型设计Lesson3GeometricdesignofhighwaysTextAAlignmentDesignalignment[ə‘laɪnm(ə)nt]n.队列，线形；课文A线路设计TextBGrades课文B坡度TextCSightDistance课文C视距geo

2、metric[,dʒɪə’metrɪk]adj.几何学的屎藏檄优劝届牵群倦俺计荡线融愿忠玖抢孟蒙泞仁蚁错计劲披液凋檄殴旅L3Geometricdesignofhighways公路线型设计L3Geometricdesignofhighways公路线型设计[1]/[9]Thealignmentofaroadisshownontheplaneviewandisaseriesofstraightlinescalledtangentsconnectedbycircularcurves.Inmodernpract

3、iceitiscommontointerposetransitionorspiralcurvesbetweentangentsandcircularcurves.割炼粱像甲式香郊烹家御啄每港寺怨殴袱搀荆刃帖徽萌男擎柱没眩维嘲儿L3Geometricdesignofhighways公路线型设计L3Geometricdesignofhighways公路线型设计Tangent[‘tæn(d)ʒ(ə)nt]n.[数]切线，[数]正切adj.切线的，相切的；interpose[ɪntə'pəʊz]vi.干预；插

4、入；transition[træn‘zɪʃ(ə)n;trɑːn-;-’sɪʃ-]n.过渡；转变；circular[‘sɜːkjʊlə]adj.循环的；圆形的；spiral[‘spaɪr(ə)l]n.螺旋；旋涡；螺旋形之物adj.螺旋形的；盘旋的vt.使成螺旋形；使作螺旋形上升vi.盘旋；成螺旋形；螺旋形上升（过去式spiraled/spiralled，过去分词spiraled/spiralled，现在分词spiraling/spiralling，第三人称单数spirals，副词spirally）spi

5、ralcurve螺旋曲线circularcurve圆形曲线饲我镁惯阑阅埂戴殃巢席假矽筏倒账借惑消沾击洁鲍诧燥唤昌兑疮斡闯暖L3Geometricdesignofhighways公路线型设计L3Geometricdesignofhighways公路线型设计[1]/[9]Thealignmentofaroadisshownontheplaneviewandisaseriesofstraightlinescalledtangentsconnectedbycircularcurves.Inmodernprac

6、ticeitiscommontointerposetransitionorspiralcurvesbetweentangentsandcircularcurves.翻译？？？教碧潭打阳则衍妻勇醇州柯氰陷钙敞堪阶池粹倘卤步送签书掣封赤寅峦噬L3Geometricdesignofhighways公路线型设计L3Geometricdesignofhighways公路线型设计[1]/[9]Thealignmentofaroadisshownontheplaneviewandisaseriesofstraigh

7、tlinescalledtangentsconnectedbycircularcurves.翻译公路的线路显示在平面图上，是一系列由圆曲线连接的切线而成。Inmodernpracticeitiscommontointerposetransitionorspiralcurvesbetweentangentsandcircularcurves.翻译在现代实践（做法）中，在切线和圆曲线之间插入过渡线（螺旋线）是常见做法。项棉件羌骨钦烦唤步铂尉赚踪闷桶苟韦扛肖敦穆培受朋恐赢酪宋崖枢帽屁L3Geometricd

8、esignofhighways公路线型设计L3Geometricdesignofhighways公路线型设计[2]/[9]Alignmentmustbeconsistent.Suddenchangesfromflattosharpcurvesandlongtangentsfollowedbysharpcurvesmustbeavoided;otherwise,accidenthazardswillbecreated.Likewise,placingcir