Hydraulic characteristics of water-wings for the middle-pier of a discharge tunnel

1. INTRODUCTION In the design of a discharge tunnel with high water head and large flow, it is important to study the cavitation and the energy dissipation, such as the prevention of cavitation for slots of various gates [1-4], the effects of entrained ai…     

EXPERIMENTAL STUDY ON CAVITATION AND WATER-WING FOR MIDDLE-PIERS OF DISCHARGE TUNNELS

1. INTRODUCTION Discharge tunnel ,specially , deep-water one , is a sort of usual flood discharge structure with pressure flows in the inlet section,followed pres- sure flows or free flows ,and is used in flood dis- charge or emptying a reservoir , and/or washing sands .For deep-water tunnels ,the designs were u- sually adopted of the manners of the shaft ,of the inclined sectionin the inlet or in the outlet ,called visually as “Dragon up one’s head”or “Dragon down one’s tail”in Chi…     

透明土及其在岩土工程模型试验中的应用研究进展

介绍人工合成透明土体的发展及其在岩土工程模拟试验、土体连续变形测量方面的应用。结合离心机模型试验和数字图像处理技术在国内的发展,对实现由离心机、数字图像技术和透明土模型结合而成的非介入离心机模型试验进行了可行性分析,认为目前已具备开展非介入离心机模型试验的条件。     

三板溪工程施工进度与施工度汛方案研究

三板溪工程导流洞与大坝施工以及水库初期蓄水是控制首台机组发电工期的关键线路。主坝为200m级高面板堆石坝，其施工度汛方案的选择直接影响到工期目标的实现。经综合分析论证，最终确定了“一汛”采用“一枯抢拦洪”度汛方案。该方案既满足了工程安全度汛要求，又可使大坝连续快速施工，为提前发电奠定基础，效果良好。