论文部分内容阅读
一、前言引水量不超过河水总量的70%、平时来水大于5米~3/秒的山溪性河流的取水排洪,新疆地区采用苏联在中亚细亚首创的费尔干式取水枢纽和曲线型沉沙池,收到了良好的效果,积累了一定的经验。然而对于流量变幅甚大的山溪性河流,洪水流量常为枯水期的几十、几百甚至上千倍,河床主槽常随洪水不断变化,山洪爆发时,大量推移质砂砾甚至几十厘米的块石也顺流而下,如完全采用费尔干式,则上游整治段势必过宽,泥沙易在其首、中段淤积,主流将于其内频繁摆动,而闸前段则难以实现利用横向环流排沙的目的。本文分析了费尔干式应用于流量变幅甚大的山溪性河流所存在的主要问题,提出了相应的改进措施。
I. INTRODUCTION Water diversion and drainage of mountain streams with a water inflow of no more than 70% of the total amount of the river water usually occurs when the water level is more than 5-3 m / s. The Xinjiang Uygur Autonomous Region introduced the Fehr dry water intake project pioneered by the Soviet Union in Central Asia and Curve desilting pool, received good results, has accumulated some experience. However, for the mountain stream with a large flow rate, the flood discharge is often tens, hundreds or even thousands of times of the dry season. The main channel of the river bed often changes with the flood. When flash floods occur, a large amount of gravel or even tens of centimeters Rock block also down the river, such as the complete use of Feiergan-type, the upper reaches of the regulation section is bound to be too wide, easy to sediment in the first, the middle siltation, the mainstream will be frequent swings within the gate before the segment is difficult to achieve the use of horizontal The purpose of circulating sand. This paper analyzes the main problems existing in the Feier dry-type mountain stream with large flow amplitude and puts forward the corresponding improvement measures.