望亭水利枢纽钢闸门阴极保护实践

针对望亭水利枢纽闸门和启吊钢丝绳锈蚀原因,对钢闸门实施牺牲阳极方式进行保护,取得了较好的防腐蚀效果。本文对此加以介绍。     

基于BIM技术的水工隧洞施工进度仿真研究

针对目前水工隧洞施工仿真模型与三维软件结合不足和未实现完整的仿真模拟2个问题,基于BIM技术开展水工隧洞施工进度仿真理论与施工进度4D化技术的研究。首先基于CATIA建立水工隧洞的三维参数化模型;再结合水工隧洞施工特点和仿真原理,建立水工隧洞施工仿真模型;最后提出水工隧洞4D实现框架。通过以上方法实现了水工隧洞施工进度的查询和施工信息的展示。实践证明,基于BIM的水工隧洞施工进度仿真模型可以实现施工进度的计算和施工强度的查询,以提高工程建设过程中的管理水平。     

弧形坡脚梯形渠道实用经济断面计算公式的改进及计算结果的修正

文中对《山西水利科技》2004年第一期“弧形坡脚梯形渠道实用经济断面的计算”一文中KB公式的形式进行了改进并对该文中KB值的计算表格数据作了修正。     

The development of hydraulic and geomorphic complexity in recently formed streams in Glacier Bay National Park,Alaska

Geomorphic and hydraulic complexity within five streams representing 200 years of stream development were examined in Glacier Bay National Park, Alaska. Channel geomorphic units (CGUs) were mapped using a hierarchical approach, which defined stream habitat according to morphological and hydraulic characteristics. Detailed hydraulic assessment within the geomorphic units allowed differences in hydraulic characteristics across the 200‐year chronosequence to be documented. Channel geomorphology and hydrology changed as stream age increased. Younger streams were dominated by fast flowing geomorphic units such as rapids and riffles with little hydraulic or landscape diversity. As stream age increased, slower flowing habitat units such as glides and pools became more dominant, resulting in increased geomorphic, hydraulic and landscape diversity. These results suggest that geomorphic and hydraulic complexity develop over time, creating habitat features likely to be favoured by instream biota, enhancing biodiversity and abundance. Copyright © 2009 John Wiley & Sons, Ltd.     

水工混凝土常见质量缺陷及处理

水工混凝土的质量缺陷轻则影响工程整体美观、重则影响工程结构安全和使用功能,直至造成质量事故。如何最大限度地消除水工混凝土的质量缺陷,保证工程结构安全尤为重要。文章简要分析和阐明了水工混凝土常见质量缺陷产生的原因、质量缺陷的类型和一般的处理方法,并介绍了某水电工程混凝土质量缺陷的处理实例,提出了避免水工混凝土质量缺陷的关键还是在于预防。     

改善双向叶片泵性能的研究

回顾了双向叶片泵在实际泵站工程中的应用情况,介绍了国内外的双向叶片泵研究概况,分析了CFD作为双向叶片泵性能研究的方法的可行性和可靠性,并结合现状,从实际出发,提出可以从冲角入手设计叶片（S翼型）以改善双向叶片泵的性能,并且提供了参考模型。     

万家寨引黄工程水力量测系统建设及其运行

水力量测系统是大型引水工程实现监测控制及调度运行自动化管理的重要组成部分。文中以山西省万家寨引黄一期工程为例,详细介绍了水力量测系统的硬件设备选型、量测站点布设和数据采集传榆,并基于统计学原理和数据库技术建立相应的数据分析模型,利用Visual Basic语言和SQL server数据库技术混合编程,对水力量测系统的监测数据进行分析。结果表明,开发数据分析计算机系统可以实时、动态查询分析水力量测系统的运行状态并为运行调度提供科学依据,这对于实现大型引水工程运行管理由经验型决策向科学化决策的转变具有现实意义。     

CAPILLARY PRESSURE-SATURATION RELATIONSHIPS IN ROCK FRACTURE

Understanding and quantifying unsaturated flow through fractures in rocky slope is important for design and construction of drainage system in large-scale hydraulic engineering. The data of the hysteretic relationship between capillary pressure and water saturation are primary for simulating unsaturated flow in fractures and analyzing the stability of high rocky slope. The drainage and imbibition curves are measured for a single fracture in granite sample got at construction site of the Three Gorges Project (TGP). The method used in this study for measuring the capillary pressure-saturation relationship , under the conditions of no normal load to rock sample, is generally following the laboratory technique developed by Reitsma and Kueper. A distinct entry pressure, indicating rise to initiate nonwetting phase invasion, was observed. The drainage curve is found to be well represented by van Genuchten porous media capillary pressure function.     

液压扳手摆动油缸机构方案分析

通过对摆动油缸式液压扳手执行机构位置参数的分析推导，给出其位置参数的计算公式和设计条件，在给定的摇臂单程转角及坚固件拆装力矩等条件下，可使需液压缸的推力最小。     

GCL——一种新型复合土工材料的特性及应用综述

 对GCL基本产品的结构类型、水力特性、强度特性、隔气性等作了概括性的介绍，通过图解说明了GCL在环境工程和水利工程中的应用情况，最后指出了其在工程应用中应注意的几点问题。