水电站月牙肋钢岔管研究进展综述

摘要

Crescent-rib steel bifurcation is one of the most widely applied bifurcation type in hydropower station all over the world,with the following advantages of convenient manufacture and installation,adequate structure size,and reasonable flow pattern.A lot of research works on crescent-rib steel bifurcation have been well documented as well as the engineering practice experience.However,full acknowledgement has not been achieved on some issues of crescent-rib steel bifurcation.In this study,the latest researches of the crescent-rib steel bifurcation are presented in five aspects,including shape optimum design,stress control criterion,combined bearing mechanism of embedded steel branch pipe,computer aided design system,and bearing capability in Z-direction of the steel rib.The values of related design parameters are proposed based on a wide range of engineering practice while the guideline for the research and design of the crescent-rib steel bifurcation are yielded,which can be a well reference through the related design and research work of the crescent-rib steel bifurcation of hydropower station.%月牙肋钢岔管具有制作安装简单、结构尺寸小、水流流态好等优点,是国内外众多水电站中应用最为广泛的岔管类型之一.目前针对月牙肋钢岔管已经开展了大量的研究工作,也积累了相当丰富的工程实践经验,但是仍有一些问题未被研究或设计人员所完全熟知和认同.本文主要从岔管体型设计、应力控制标准、埋藏式钢岔管联合承载机理、计算机辅助设计系统的开发以及肋板厚度方向性能5个方面介绍了水电站月牙肋钢岔管的最新研究进展,结合广泛的工程实例给出了相关设计参数的取值建议,并基于相关研究成果的总结分析,提出了比较明确的设计导向,可为水电站月牙肋钢岔管的设计以及相关科研工作等提供参考.