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山区公路实地选线定线比平原区的线形要复杂的多,同时受地形地质条件的影响,外业勘测时必需综合考虑路线纵坡坡度、坡长及横断面的满足条件等。文章通过对山区公路几种常见平面线形的特点分析,为实地选线定线者合理布设平面线形提供参考依据。具体在外业测设时应根据地形、地质、纵横向综合考虑后定线布设,必要时反复调整才能选出较为经济合理和舒适美观的线形。
The route selection of mountain highway is more complex than that of the plain area. At the same time, due to the influence of topography and geological conditions, it is necessary to comprehensively consider the condition of slope length, slope length and cross-section of the route in the field survey. Through the analysis of the characteristics of several common plane lines in mountainous highway, the article provides references for the reasonably laying of plane lines in the route selection. Specifically in the field surveying and mapping should be based on topography, geology, vertical and horizontal to consider the layout after routing, if necessary, repeated adjustments can be selected more economical and reasonable and comfortable and beautiful appearance of the line.