双语教学资源 高速铁路工程概述 1Track.pptVIP

Track 石家庄铁路职业技术学院 Track (轨道工程) The track (轨道) on a railway or railroad, also known as the permanent way (道床), is the structure consisting of the rails (钢轨), fasteners (扣件), sleepers (轨枕) and ballast (道碴) (or slab track (板式轨道)), plus the underlying subgrade (路基). 铁路中的轨道工程，也称为permanent way，包括轨道、扣件、轨枕和道碴（或轨道板），外加下面的路基。 Track Track Track Track Track Track For clarity it is often referred to as railway track (British English and UIC terminology) or railroad track (predominantly in the United States) UIC 国际铁路协会 为了清楚起见，它常常指的是铁路轨道(英语和UIC词汇)或铁路轨道(在美国广泛使用) Track Track structure (轨道的构造)： Traditional track Ballastless track (无碴轨道) Track Traditional track Notwithstanding modern technical developments, the overwhelmingly dominant track form worldwide consists of flat-bottom steel rails supported on timber or pre-stressed concrete sleepers (railroad ties in the US), which are themselves laid on crushed stone (碎石) ballast. dominant 有统治权的, 占优势的, 支配的 Track Traditional track Notwithstanding modern technical developments, the overwhelmingly dominant track form worldwide consists of flat-bottom steel rails supported on timber or pre-stressed concrete sleepers (railroad ties in the US), which are themselves laid on crushed stone (碎石) ballast. 尽管现代科技已经进步，整个世界范围内应用最广泛的轨道形式仍是由平底的钢轨组成，钢轨支撑在木枕或预应力混凝土轨枕（美国称为railroad ties）上，而轨枕则放置在碎石道碴上。 Track Traditional track Most railroads with heavy traffic use continuously welded rails (无缝线路) supported by sleepers (ties) attached via baseplates (垫板) which spread the load. A plastic or rubber pad (垫) is usually placed between the rail and the tieplate (垫板) where concrete sleepers (ties) are used. 许多重载铁路使用无缝线路；钢轨支撑在轨枕上，并用垫板分散荷载。当使用混凝土轨枕时，常常在垫板和钢轨间放置一个塑料或橡胶垫。 Track Traditional track Track The rail is usually held down to the sleeper (tie) with resilient fastenings (弹性扣件), although cut spikes (钩头道钉) are widely used in North American practice. resilient [ri5ziliEnt] 弹回的, 有回弹力的 钢轨通过弹性扣件紧固在轨枕上，而在美国南北钩头道钉应用更广泛。 Track S