兰新铁路的防风工程

Windproof Engineering of Lanzhou-Xinjiang Railway

兰新铁路沿线风区对铁路运输影响很大，严重危害铁路运营安全。文中介绍了兰新铁路沿线风区防风的必要性、风区大风的特征及其主要参数，阐明路基防风工程机理，介绍了现阶段已采用的挡风设施并剖析其优缺点及其适用范围，提出在风区范围修建铁路应注意的要点：大风区往往产生沙害，防风工程应与防沙相结合；防风工程应根据风区大风特征、路基形式及填料等，充分结合地形选取合适的防风结构；在选线过程中就应首先注意风区线路平纵断面的优化。

Wind belt along Lanzhou-Xinjiang Railway exerts enormous impact on railway transportation, and seriously affects railway operation safety. This paper introduces the necessity of windproof measure, wind features and the main parameters along Lanzhou-Xinjiang Railway as well as the mechanism of subgrade windproof engineering. It also introduces the currently adopted windproof facilities, analyzes its advantages and disadvantages and its applicable range. It puts forward the points for attention for railway construction in wind belt where sand damage often occurs with strong wind. Proper windproof structure shall be chosen by taking into account of wind features, formation of subgrade and its filling etc, and combined with the land selection as well. Priority shall be given to the optimization of the horizontal and vertical sections in the route selection.