高温季节碾压混凝土坝强约束区温控防裂方案研究  

Study on Temperature Control and Crack Prevention Scheme of Strong Constrained Zones in Roller Compacted Dams during High Temperature Season

作　　者：强晟[1] 张勇强[1] 钟谷良 练松涛 苗孝哲 

机构地区：[1]河海大学水利水电学院,南京210098 [2]雅砻江流域水电开发有限公司,成都610000 [3]中国水利水电第四工程局有限公司,西宁810000 [4]中国水利水电第十一工程局有限公司,郑州450000

出　　处：《三峡大学学报（自然科学版）》2013年第4期1-4,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然基金资助项目(51109071;51209078);江苏高校优势学科建设工程资助项目

摘　　要：我国西南地区高温季节持续较长,碾压混凝土坝面临施工期温度裂缝的威胁.基于碾压混凝土坝施工期开裂机理,结合某大型碾压混凝土重力坝强约束区高温季节的施工,采用有限元仿真算法模拟了不同昼夜温差条件下的混凝土温度场和应力场发展过程,根据计算结果对表面保温和水管冷却过程中的具体参数进行优化,成果对同类工程具有参考价值.High temperature season lasts longer comparatively in southwest of China, roller compacted con- crete dams constructed in such areas will face the threat of temperature crack during construction period. Based on cracking mechanism of RCC dam during construction period, finite element simulation algorithm is applied to simulate the development of concrete temperature field and stress field of strong constrained zones of RCC dam during construction period in different day and night difference. According to the calculation re- sults, specific parameters of surface heat preservation and cooling process are optimized. Relevant achieve- ment has reference value to similar engineering.

关 键 词：高温季节 碾压混凝土 强约束区 温控防裂 

分 类 号：TV543[水利工程—水利水电工程]