Taking the gate-dam for Doutankou Hydropower Station on Niulanjiang River as a study case,the 3-D seepage field and stress field for this kind of structure pattern for the gate dam constructed on a pile foundation with deep over burden under several operation conditions are analyzed herein.As the horizontal thrust on the dam body,horizontal seepage force on the dam foundation and vertical seepage pressure on the dam bottom caused by the large water depth in front of the dam and the high permeability of the strata therein are greater,larger horizontal displacements of both the dam body and the pile foundation occurred.Therefore,the measures to reduce the horizontal displacements are comparatively studied;in which a foundation treatment scheme of combined load bearing with both the pile foundation and the foundation anti-sliding wall for the gate-dam is put forward for the first time.

Many hydropower stations are planned and being constructed in high seismic intensity zones in China.When the great earthquake strikes,lots of ground factory buildings are ruined and thousands of people are killed,which is awfully shocked.The seismic design of hydropower plant building located in high seismic intensity zone is focused on by engineers.In this paper,the Xiaoqinghe hydropower station bank plant house which will be constructed in grade 9 seismic fortification intensity zone is analyzed with the 3-dimensional Finite Element Method.The building’s structure is analyzed and checked in 4 load cases of structure adjustment and different seismic intensity earthquakes.The analysis procedure and conclusions of this paper offers a valuable reference to the same kind of projects.

In combination with the natural topographic condition of the dam site,the characteristics of both the non-homogeneous material for the core and the poor permeability of the dam shell for the weathered material-filled dam with clay core for Nanyang Reservoir,analysis and introduction are made herein on the aspects such as the structural design of the dam section,the design of all the dam construction materials,the quality control standard and the foundation treatment etc.,so as to provide a reference for the similar projects.

在高震区易液化的全风化花岗岩地基上修建心墙堆石高坝,用于防渗的土料为易液化低粘粒含量的全风化花岗岩砂土,基础及坝体的动力安全性是坝体设计中的关键问题.通过采用各筑坝料的静、动力试验研究成果,对大坝典型设计剖面进行了静、动力有限元数值分析,对坝体安全性进行了论证,结果表明:坝体在静力荷载作用下是安全的;坝体在动力荷载作用下,若遇8度地震,上游坝脚处的基础全风化砂层和坝体上游面残坡积土斜墙防渗体可能发生液化,下游坝脚剥离弃料坡面可能发生剪切破坏,将影响大坝的稳定安全.

结合龙滩大坝施工及气候特点,对高温、次高温季节施工的混凝土入仓温度、浇筑温度及各种措施的温控效果进行了研究,分析了大坝温度和应力的变化过程及规律,提出了高温季节碾压混凝土浇筑相应的温控措施,为工程提供参考.

简述石门水库导流泄洪隧洞的设计概况,介绍工程施工导流方案,泄洪隧洞设计、试验及采取的工程措施,并对利用导流隧洞改建的龙抬头泄洪隧洞的利弊进行分析.