【正文】 ............................................................................. 5 直線 ............................................................................................................................. 5 ............................................................................................................. 5 ...................................................................................................... 6 圓曲線： ...................................................................................................................... 6 ...................................................................................................... 6 ............................................................................................................. 7 緩和曲線 ...................................................................................................................... 8 蘭州交通大學畢業(yè)設計（論文） II ...................................................................................................... 9 ................................................................... 9 ..............................................................................................10 平面線形設計 ..............................................................................................................10 .......................................................................................10 ..................................................................................................10 5 縱斷面設計 ....................................................................................................................... 11 縱坡及坡長設計 .......................................................................................................... 11 ....................................................................................................................... 11 ................................................................................................................ 11 ................................................................................................................ 11 ................................................................................................................12 ................................................................................................................12 ................................................................................................................13 ................................................................................................................13 豎曲線 ........................................................................................................................13 .....................................................................................................14 道路平縱組合 ...............................................................................................................15 ..............................................................................................15 ...........................................................................................15 縱斷面設計方法及步驟 ................................................................................................16 .....................................................................................................16 .....................................................................................................16 .....................................................................................................17 6 道路橫斷面設計 ................................................................................................................18 道路橫斷面的組成 .......................................................................................................18 ............................................................................................................18 .........................................................................................................18 行車道及路肩、路拱 ...................................................................................................18 ..................................................................................................18 ..............................................................................................18 .......................................................................................................................19 ............................................................................................................19 蘭州交通大學畢業(yè)設計（論文） III 橫斷面設計 ..................................................................................................................21 ...........................................................................................21 路基土石方計算及調(diào)配 ................................................................................................22 .....................................................................................................22 .....................................................................................................22 7 路基工程 ...........................................................................................................................24 路基類型與構造 ..........................................................................................................24 路塹 ......................................................................................................................24 .......................................................................................................................25 .........................................................................................................25 路基設計 .............................................................................................