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一路线勘测中的主要工程地质问题路线选择是由多种因素决定的,地质条件是其中的一个,但它是一个重要的因素,有时则是控制性的因素。路线方案有大方案与小方案之分,大方案是指影响全局的路线方案,如越甲岭还是越乙岭,沿A河还是沿B河,一般是属于选择路线基本走向的问题;小方案是指局部性的路线方案,如走垭口左边还是右边,沿河右岸还是左岸,一般是属于线位方案。工程地质因素不仅影响小方案的选择,有时也影响大方案的选择。
The main engineering geological problems in a route survey is determined by a variety of factors. Geological conditions are one of them. However, it is an important factor and sometimes a controlling factor. The program of a route is divided into a large program and a small program. The large program refers to the route that affects the overall situation. For example, the Yue Chia Ling or Yue Biling, along the A or B rivers, generally belong to the basic trend of the selected route; Refers to the local route programs, such as walking pass left or right, along the river right bank or left bank, usually belonging to the line program. Engineering geology not only affects the choice of small options, but sometimes also affects the choice of large options.