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这里谈的山区公路定线,限于技术标准较低的公路,包括翻越山岭、穿过重丘陵地区以及沿溪等定线方法。后一种路线是为了避免越岭,从山岭一侧进入河谷,沿河绕到山岭另一侧。有些地方把山区河流叫作溪,一般称沿溪线。(一)越岭路线定线山岭地形,一般是复杂的,但任何复杂的崇山峻岭,没有修不通路的,只是工程大小问题。定线的任务,是在一定的路线级别和一定的山形情况以及一定的施工条件下(包括施工设备与工期),定出最经济合理的路线。
The mountain road alignment discussed here is limited to the less technically standard highways, including crossing the mountains, crossing the heavy hilly area, and alignment along the river. The latter route is to avoid crossings, from the mountain side into the valley, along the river to the other side of the mountain. In some places, the mountain river is called a river, which is generally called along the river line. (A) of the ridge line alignment Mountain topography, is generally complex, but any complex mountains, no repair no access, but the size of the project. The task of alignment is to determine the most economical and reasonable route under a certain route level and certain Yamagata conditions as well as under certain construction conditions (including construction equipment and construction period).