广东水利水电Issue(1)：51-56,6.
东南亚地区某碾压混凝土坝裂缝成因及防治措施研究
Study on the Crack Causes and Prevention Measures for the Roller Compacted Concrete Dam in Southeast Asia
摘要
Abstract
Concrete cracking is one of the primary factors affecting the strength and durability of hydraulic structures.The Southeast Asian region experiences high temperatures and heavy rainfall throughout the year,with a small average monthly maximum temperature difference of 8.6 ℃ and a large average annual temperature difference of 20.2℃.Although concrete temperature is relatively easy to control,cracking issues still occur.Based on the roller-compacted concrete dam in Southeast Asia,the characteristics of temperature stress during the construction period were studied using finite element.Sensitivity factors for concrete cracking were analyzed,and detailed research was conducted on temperature control and crack prevention measures.The results show that the long intervals between pouring and cold wave have a significant impact on the change of concrete temperature stress.The strong constraint effect of old concrete and the temperature difference between fresh and old concrete add up to cold stress,leading to concrete stress exceeding the limit and temperature cracks.Furthermore,temperature control measures were explored to reduce thermal stress in newly poured concrete,providing valuable references for the construction of large-volume concrete projects in Southeast Asia.关键词
碾压混凝土坝/长间歇/寒潮/非均匀地基/裂缝/温控防裂措施Key words
roller-compacted concrete dam/long intervals between pours/cold waves/non-uniform foundations/cracking/temperature control and crack prevention measures分类
水利科学引用本文复制引用
周人飞,刘勋楠,刘玉..东南亚地区某碾压混凝土坝裂缝成因及防治措施研究[J].广东水利水电,2024,(1):51-56,6.基金项目
国家重点研发计划项目(编号:2021YFC3090102) （编号:2021YFC3090102）
引江济淮工程混凝土抗裂性能及温控措施关键技术研究(编号:YJJH-ZT-ZX-20190829180). （编号:YJJH-ZT-ZX-20190829180）
