南水北调中线京石段左岸排水建筑物水力设计的可靠性分析

South-to-North Water Transfer Project:reliability analysis of hydraulic design for the left bank drainage structures within the section of Beijing-Shijiazhuang

应用概率可靠性分析方法对南水北调中线京石段左岸排水建筑物进行水力设计,揭示出常规采用的结构尺寸余度对满足其泄洪要求的使用可靠性,不同水面超高下结构的泄流可靠性及其极限泄流能力,不同类别建筑物泄流可靠性对水面超高增加的敏感性,不同水力要素变异对结构泄流可靠性的影响,为南水北调中线左岸排水建筑物合理设计、施工及总干渠安全运行提供有益的参考.

This article applies the method of probability analysis to the hydraulic design of the left bank drainage structures within the section Beijing-Shijiazuang for the middle route of south-to-north water transfer project. The method enables to reveal the effect of commonly adopted structural dimension margins on flood discharge reliability, that of the discharge reliability and ultimate discharge capacity under different water surface superelevations as well as the discharge reliability of different structures on the sensibility of water surface superelevations, and that of different hydraulic factors on discharge reliability. The data gathered will be helpful to the design and construction of the above left bank drainage structures, as well as to the safe operation of the main diversion canal.