自密实混凝土重力坝浇筑层间稳定性分析研究  

Study on stability between pouring layers of a self-compacting concrete gravity dam

作　　者：赵洋 马少博 赵珍 王博 张岳 ZHAO Yang;MA Shaobo;ZHAO Zhen;WANG Bo;ZHANG Yue(Shaanxi Water Affair Group Co.,Ltd.,Xi’an 710004,China;Yangling Vocational and Technical College,Yangling 712100,China;Hanjiang-to-Weihe River Valley Water Diversion Project Construction Co.,Ltd.,Xi’an 710100,China)

机构地区：[1]陕西省水务集团有限公司,陕西西安710004 [2]杨凌职业技术学院,陕西杨陵712100 [3]陕西省引汉济渭建设工程有限公司,陕西西安710100

出　　处：《水资源与水工程学报》2021年第2期180-184,共5页Journal of Water Resources and Water Engineering

摘　　要：自密实混凝土重力坝是用流动性较强的混凝土在堆石之间填充并分层浇筑而成。为了研究浇筑层间的稳定性,采用刚体平衡原理和第三强度理论分别对自密实混凝土重力坝层间的抗滑稳定性和堆石间拉力情况进行了分析研究。结果表明:随着坝体层间堆石相对接触面积α的增大,层间抗滑稳定系数K逐渐增大,但是增加的幅度处在一个稳定的范围之内;随着堆石相对超出高度β的增大,堆石间的拉力逐渐增大,β=15%可以作为自密实混凝土重力坝设计的上限值;地震工况对于坝体层间抗滑稳定系数K和堆石间拉力大小的影响较大,该工况抗滑稳定系数K减小了15%以上,堆石间拉力最大增大约2 MPa。Self-compacting concrete gravity dams are constructed by fully filling the space between rockfills with high-fluidity concrete and pouring the concrete in layers.In order to study the stability between the pouring layers,the rigid body balance principle and the third strength theory were used to analyze the anti-sliding stability and rockfill tension between the self-compacting concrete gravity dam layers.The results show that as the contact areaαincreases,the inter-layer anti-sliding stability coefficient K increases gradually,but the increment is within a stable range.Furthermore,the tensile force between the rockfill piles increases gradually with the increase of the exceeding heightβ,whenβ=15%,it can be used as an upper limit for the design of self-compacting concrete gravity dam.Under earthquake conditions,the earthquake had a great influence on the anti-sliding stability coefficient K of the dam and the tensile force between the piles,the anti-sliding stability coefficient K reduced by more than 15%,and the tensile force between the piles increased by about 2 MPa.

关 键 词：自密实混凝土重力坝 浇筑层间 刚体平衡原理 第三强度理论 抗滑稳定性 堆石间拉力大小 

分 类 号：TV642.3[水利工程—水利水电工程]