论文部分内容阅读
由于高原山区越岭线连续升降坡克服高差大、里程长,沿线地形陡峭、地势险峻,公路展线布设平纵横自由度小,限制条件和因素多,展线的合理性,布线的经济性,平纵指标的均衡性、连续性,断面形式的适宜性直接影响,甚至决定工程建设规模、道路抗防灾能力、公路运营安全、行车舒适度以及养护成本、运输社会效益等。因此,高原山区公路越岭展线的思路和原则,是公路建设关键,不仅影响勘察设计成本、质量,而且长期影响和制约交通运输。公路是由平、纵、横三个面组合的线形带状,勾造物,高原山区越岭线平、纵、横三个面的有机结合尤为重要。高原山区特殊而复杂的地理环境,大规模长距离越岭展线,实现穿山越岭,缩短山岭时空。本文归纳总结高原山区越岭线展线的基本思路,分析论述各种思路在高原山区公路中的应用。
Due to the high elevation difference, long mileage, steep terrain and steep terrain along the continuous rise and descent slope of plateau mountainous area, the horizontal and vertical freedom of horizontal and vertical crossings laid by the highway is small, the restriction conditions and factors are more, the rationality of the exhibition line and the economy of layout , The vertical and horizontal indicators of the balance, continuity, the appropriateness of the cross-sectional form of a direct impact, and even decided to project construction scale, road anti-disaster capability, road safety, driving comfort and maintenance costs, transport social benefits. Therefore, the ideas and principles of the cross-mountain line of mountain plateau are the key to highway construction, which not only affects the cost and quality of survey and design but also affects and restricts the transportation in the long run. Highway is composed of flat, vertical and horizontal combination of three linear ribbons, hook objects, plateau mountain ridge line flat, vertical and horizontal organic combination of three aspects is particularly important. Plateau mountainous special and complex geographical environment, large-scale long-distance traversing of the mountains, to achieve more mountains and mountains, shorten the time and space mountains. This article summarizes the basic ideas of the Linggong line expansion in the plateau mountains and analyzes the application of various ideas in the highway in the mountain plateau.