龙滩碾压混凝土重力坝极限承载能力判别方法研究  

Comparison between Two Methods of Determining the Ultimate Strength of Gravity Dam in Longtan Project

作　　者：黄劲松[1] 王先军[1] 赖国伟[1] 陆述远[1] 

机构地区：[1]武汉大学水利水电学院,湖北武汉430072

出　　处：《红水河》2002年第4期4-7,共4页Hongshui River

基　　金：九五"国家重点科技攻关项目(96-220-01-01-01(1))

摘　　要：在采用强度储备系数法计算重力坝的极限承载能力的过程中,随着材料强度的逐步降低,首先在局部小范围出现屈服区,随后这一屈服破坏区范围逐步扩展,直到最后坝体内的屈服破坏区贯通上下游坝面,最后丧失保持平衡的能力,导致重力坝的整体破坏。本文从两方面提出了界定这一极限承载能力的标准。运用屈服区贯通判别法和能量法对龙滩碾压混凝土重力坝极限承载能力作了分析对比。When studying the ultimate strength of gravity dam by strength reserved coefficient method, it found that with the decreasing of material strength, a small yield area appeared in the beginning, and then it enlarged gradually until it went across the upstream to the downstream of the dam. Then the dam lost its ability to keep balance and come into the ultimate state. This paper presents two criteria to determine this ultimate strength of the dam. The first one is to see if the yield area has gone across the dam, and the second is to determine by using the energy method, based on stability theory. These two methods are applied to the roller compacted concrete (RCC) gravity dam of Longtan project for comparison analysis.

关 键 词：碾压混凝土重力坝 极限承载能力 龙滩水电站 

分 类 号：TV642.3[水利工程—水利水电工程]