大山口水电站大坝安全定期检查既述

大山口大坝于1999年9月开始定检,对工程等级与洪水、工程地质条件、坝体稳定应力进行了复核,对施工质量进行了复查;对重力墩裂缝成因与影响进行了分析,对基础渗漏、大坝变形分析和大坝运行进行了分析总结,结合现场检查,定检专家组完成了大山口大坝定期检查工作,大坝被评为正常坝。     

小浪底水利枢纽库坝区主要环境工程地质问题分析

根据现场资料 ,对小浪底水利枢纽库坝区主要环境工程地质问题发育的地质环境、形成机理、变形破坏特征、可能造成的灾害程度等进行分析 .结果表明 ,随着库水位的逐渐升高 ,水库蓄水引起的近坝库岸稳定、库坝区渗漏、水库诱发地震及水库淤积等环境工程地质问题已开始孕育和发展 ,有的问题已经出现 .     

Deriving the optimal refill rule for multi-purpose reservoir considering flood control risk

For most multi-purpose reservoirs, there is a conflict between the flood control and refill operations. Refill before the end of the flood season is a valuable and effective solution to the conflict. In this paper, we present a method to derive the optimal refill rule for multi-purpose reservoir considering flood control risk. The paper begins with an investigation of the temporal trends of historical reservoir inflow series during refill period by the methods of linear regression, Mann–Kendall and Spearman's rho test. Six refill rules are then proposed. A procedure to couple a flood control risk module with utilization benefits analysis module is then developed to derive the optimal refill rule. China's Three Gorges Reservoir (TGR) is selected as a case study. The application results show that the optimal refill rule is that refill begins on September 1 with storage level reaching 160 m on September 30 linearly. Compared with the original rule, the optimal refill rule can increase hydropower generation by 7.19%, decrease spilled water by 25.07%, and improve the fullness storage rate to 95.35%, without increasing flood control risk.     

A dam-breach erosion model: II. Application

In Part I, the earthen dam breach erosion was analyzed. To this end, the BEED (breach erosion of earthfill dams) model was modified and extended. In this paper, Part II of the series, the extended BEED model is applied to three historical cases: South Fork Dam, Buffalo Creek Dam, and Teton Dam. The testing before it can be used for forecast purposes. A sensitivity analysis of the model to its parameters shows that the model is very sensitive to friction factors; Chenzy's for breach erosion, and Manning's for flood routing.     

生物护坝措施在汾河下游治理中的应用

汾河下游段河道行洪速度缓慢，土堤长期受洪水浸泡，极易垮堤决口。如何固土，提高土堤的耐浸性就成为土堤稳定亟待解决的问题。本文针对这一问题提出了一种生物护坝的治理措施。     

大河庙水库大坝除险加固及其效果分析

本文针对大河庙水库大坝在高水位运行时渗漏严重,危及大坝安全的问题,结合在大坝除险加固方面的成功经验,提出了切实可行的固结灌浆处理方法,并对其效果进行了分析.     

特构斯河山口引水枢纽的引水防沙设计及试验研究

通过特克斯河口引水枢纽的试验研究，解决了常遇洪水低水位运行时河流两岸的引水问题，优化了水平县板特结构形式，收到了较好的引水防沙效果，为县板分层式引水枢纽工程设计提供了新经验。     

汾河二库大坝安全监测成果分析

汾河二库大坝为全断面碾压混凝土重力坝。在坝体、坝基及岸坡共埋设内、外观测测点 335个。本文就施工阶段内部观测的部分成果进行了整理分析     

小浪底水库拦沙运用期大洪水对温孟滩移民安置区河段影响的试验研究

小浪底水库移民安置区温孟滩河段河道整治模型试验研究结果表明，在水库拦沙运用期冲刷严重的初始河道地形条件下遭遇大洪水后，河势变化不大，河道整治工程对大洪水是基本适应的，但存在个别工程入流过死，局部冲深大和送溜不力等情况。由于前期河床已冲刷下切，河槽泄洪能力大大增加，洪峰期（Ｑ＝１００００ｍ３／ｓ）基本未出现明显漫滩。本文对局部冲刷的基本规律也作了探讨。     

小浪底主坝基础灌浆施工技术进步

小浪底小利枢纽工程在主坝基础灌浆中采用了自动记录仪和稳定浆液，调整结束标准，固结灌浆采用新的检查方法，并成功地进行了GIN灌浆法生产性试验，相应地推动了国内灌浆技术的发展。