本研究乃是以山區道路路廊規劃策略為目標,以山坡地之地形特徵為主軸,將平均坡度、地形曲折程度等因子與道路平面定線及橫斷面之幾何關係予以分析。 筆者嘗試以實用性的角度,探討道路線形與地形因子的幾何關係,並建立簡化的幾何模型予以模擬。最後將各項不同因子細分級距,分別計算出該特定情況下之設計數據,並彙整成對照表。希望能提供一個簡便的評估工具,讓工程師在山區道路規劃設計時,只需查表,即能估算出較為精準的開發量數據,也讓事業主管機關能驗證規劃圖說的準確性。並以自然環境為主體,擬定山區道路規劃之設置等級、路寬及相關道路設施,以期將生態工法之理念於山區道路定線時即已落實。
This research is aimed to establish a sample, but practical, evaluation method for mountainous roadway alignment planning and design, mainly dealing with the terrain characteristic of the hillside. It is intended to develop geometry relationships between the alignment and cross section, cut & fill volumes, average slope, topographical twist angle, etc. The author studied the geometry relation between the alignment and topographical factors, and set up a simple mathematical ( including geometrical ) model for simulation. It also offers check forms to estimate the accuracy of planning / design drawing. Finally, using the developed method, it is the author’s hope that future mountainous roadway design may comply with the principles of ecological engineering.