某堆石坝沥青混凝土心墙接头变形协调性计算研究  

Calculation and study of joint deformation coordination for asphalt concrete core wall of a rockfill dam

作　　者：朱鹏飞 ZHU Peng-fei(Xinjiang Water Conservancy and Hydropower Survey,Design and Research Institute,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《广西水利水电》2021年第3期9-12,共4页Guangxi Water Resources & Hydropower Engineering

摘　　要：以某堆石坝沥青混凝土心墙为例,对4种不同油石比沥青混凝土进行长期蠕变试验,得出蠕变稳定模量,采用二维有限元算法对沥青混凝土心墙沿心墙轴线方向的变形和应力应变进行计算分析。调整左岸陡边坡基座水平距离10 m范围内心墙沥青混凝土油石比,研究其对心墙与基座的接头部位性能的影响。结果表明:该沥青混凝土心墙高坝施工和运行是安全的;调整左岸陡边坡基座水平距离10 m范围内心墙沥青混凝土油石比,对沥青混凝土心墙和左岸边坡基座水平距离10 m范围内心墙的变形和应力应变影响不大。为了提高沥青混凝土心墙在左岸陡边坡接头部位的变形能力,可以考虑将左岸陡边坡基座水平距离10 m范围内心墙沥青混凝土油石比由6.8%提高为7.0%。Taking the asphalt concrete core wall of a rockfill dam as example,long-term creep test was conducted to obtain the creep stability modulus of four kinds of asphalt concrete with different asphalt-aggregate ratios;the defor⁃mation,stress and strain of asphalt concrete core wall along the axis was calculated by two-dimensional finite ele⁃ment method.The asphalt-aggregate ratio of core wall asphalt concrete within a horizontal distance of 10m from the left bank steep slope base was adjusted to study the effects on the property of joint between core wall and base.The results of study demonstrate the construction and operation of this high dam with asphalt core wall are safe;adjust⁃ment of asphalt-aggregate ratio renders little effect on the deformation,stress and strain of core wall.In order to im⁃prove the deformation capacity of joint at left steep slope,the asphalt-aggregate ratio may be increased from 6.8%to 7.0%.

关 键 词：沥青混凝土 心墙 堆石坝 接头变形 

分 类 号：TV641.41[水利工程—水利水电工程]