双机热备PLC控制系统在水电站闸门控制中的应用

该系统基于施奈德电气公司的Quantum系列PLC（140CPu67160）构成的双机热备架构,采用高可靠性的先进元器件组成了水电站5000kN固定卷扬式启闭机组进水口闸门自动控制系统。该控制系统的测量控制模式自动化程度高,运行可靠,功能较齐全,具备完善的自动控制和保护功能。     

斜坡式升船机摩擦过驼峰技术

戍浦江河口大闸斜坡式升船机工程是该工程所攻克的主要技术难题之一。文中探讨了斜坡式升船机沿斜坡上升、峰顶水平运行、沿斜坡下降等运行过程中的控制及绞车与摩擦轮的配合等问题,并对调试过程中出现的问题进行了详细的分析。经过现场调试,运行情况良好。     

七孔闸安全鉴定初探

结合辽宁省沈阳市七孔闸安全鉴定工作,介绍分析水闸安全鉴定中遇到的主要病险原因及内容,总结经验,为类似水闸安全鉴定提供借鉴。     

Application of the submerged experimental velocity profiles for the sluice gate's stage-discharge relationship

Sluice gates have been widely used and intensively studied, however their submerged flow conditions still call for in depth attention. A large scale experimental setup equipped with Acoustic Doppler Velocimetry, ADV, and electromagnetic flow-meter was used to thoroughly investigate various aspects of the hydraulics of submerged sluice gate. In this study, new experimental data sets are provided, that help better understand and quantify the flow features for submerged sluice gates. According to the experimental data generic fitting are provided for the velocity profiles from which the velocity correction factors can be obtained. Then, the experimentally obtained submerged head loss coefficient is presented and discussed. The results of this study showed that current classical Energy-Momentum methods (EM) failed to accurately determine the flow rate for the cases of highly submergences, while employing the interaction of the energy correction factors and head loss values in the EM model would result in more accurate head-discharge estimation. The new data set provided in this work can be used effectively for the validation of numerical modeling of submerged sluice gates.     

三河闸近50年泄流变化规律

根据三河闸水文站1964年-2013年的监测资料,采用线性趋势法、滑动平均法、累积距平法以及Morlet小波分析法,探究多年来三河闸的泄流变化规律。研究结果表明,近50年来三河闸年泄流量呈下降趋势;年泄流变化的主周期是30a左右,同时存在6a、14a时间尺度的变化周期;汛期来水变化的主周期是48a左右,30a是第二主周期,同时还存在5a、10a的小尺度变化周期。从30a周期来看,未来8a三河闸年泄流仍处于相对枯水期,预计2024年开始进入相对丰水期,到2038年左右,丰水期结束。     

青草沙水库排水闸加大泄量后的 消能防冲研究

青草沙排水闸增大泄量到300 m3/s时下游将发生远驱水跃,现有消力池需要采取相应的加固措施。经水力计算和水槽试验,建议采用海漫段定点抛投四面体的海漫加糙方式,四面体棱长1 m,呈梅花状布置,顺水流和垂直水流方向,中心点间距与棱长之比2∶1,共布置5排,其壅水效果与稳定性均可满足要求。     

Three-dimensional experiment and numerical simulation of the discharge performance of sluice passageway for tidal power plant

In this study, the discharge performance of the sluice passageway of tidal power plants was investigated based on the experiments conducted in a planar open channel and three-dimensional numerical simulations. By conducting the experiments in a planar channel, it was possible to reproduce the three-dimensional flow field around the sluice passageways similar to the field condition. The discharge capability of the passageway was estimated under various flow conditions with five different channel bathymetries. The estimates of the discharge coefficient generally ranged from 1.3 to 1.45, which are significantly smaller than the values obtained from the previous study based on the two-dimensional experiment. In addition, the experimental results showed a considerable difference in the discharge coefficient among the test cases, demonstrating an apparent influence of channel bed topography on the discharge performance. Based on an intensive parametric study carried out using the numerical simulations, an optimal configuration of the width, slope, and bottom length of the apron section was suggested for maximizing the discharge capability of the sluice passageway.     

硅粉混凝土在汾河二库泄洪排砂底孔中的应用

可二库建在多泥沙的汾河上游，泄水建筑物的抗冲磨是设计和施工的关键问题，硅粉混凝土是一种新型抗 耐磨材料，具有强度高、抗磨蚀、抗空蚀能力强，以及施工简单等特点。本文结合汾河二库大坝泄洪排沙底孔硅粉混凝土施工特点，对其作用机理、材料选择和配合比的选定进行探讨，并且在施工中对底孔不同部位，采取了各异的混凝土浇筑和养护措施，满足了设计要求，防止混凝土裂缝的产生。     

地理信息系统和遥感在水文上的应用

地理信息系统和遥感在水文上的应用［德］Ｇ．Ａ舒尔兹１水文中的遥感采集遥感资料的探测器必须安装在进行测验的平台上。这些平台可以是：（１）地面观测平台（杆、塔、机动车）；（２）气球；（３）飞机和遥控飞行器；（４）火箭；（５）卫星。极轨卫星绕椭圆形轨道运行...     

三峡大坝泄洪坝段布置与结构设计

三峡大坝泄洪坝段总长４８３ｍ，最大坝高１８３ｍ，为混凝土重力坝，共布置有３层６７个泄洪孔，其中表孔２２个，深孔２３个，导流底孔２２个，表孔，深孔为永久泄洪设备，枢纽最大泄洪能力达１０２５００ｍ＾３／ｓ。泄洪坝段３层大孔口，坝体布置，结构复杂，坝基采用了封闭抽水排水措施，以减小扬压力，大坝横缝高程１１０ｍ以下的进行接缝灌浆，以增强大坝整体性和改善孔口应力；深孔有压段采用钢板衬护，以改善孔口的抗磨蚀性