摘要
港珠澳大桥东人工岛护岸挡浪墙属于大体积素清水混凝土长墙结构,内部无钢筋。在分段长度为9 m前提下,通过足尺寸模型研究挡浪墙裂缝发展规律,并寻求有效的裂缝控制技术。试验结果表明:不采取内部降温措施情况下,挡浪墙体的内部温升为45.9 ℃,应变为126×10^-6,墙体出现3条裂缝;墙体内布设1层和2层冷却水管情况下,内部最高温度分别降低9.2 ℃和14.1 ℃;墙体内布设2层冷却水管,控制侧墙与底板浇筑间隔时间不超过10 d,墙体无裂缝产生。
The protection wall in the east artificial island of Hongkong-Zhuhai-Macao Bridge is a mass concrete structure,also long wall structure. Supposing the length of the wall is 9 meters,the paper researches the development law of cracks in the retaining wall through full-scale model test,and researches effective crack control technology. The research results show that:without internal cooling control measures,the internal temperature rise of the wall is 45.9 ℃ and the strain is 126×10^-6. At the same time,there will be three cracks in the wall. The highest temperature inside the wall is reduced by 9.2 ℃ by placed one layer of cooling water pipe,and reduced by 14.1 ℃ by placed two layers of cooling water pipe. When two-layer cooling water pipes are arranged in the wall and the construction time interval between the bottom plate and the wall is not more than 10 days,there is no crack in the wall.
作者
陈克伟
孙振平
王成启
谷坤鹏
CHEN Kewei;SUN Zhenping;WANG Chengqi;GU Kunpeng(School of Materials Science and Engineering of Tongji University,Shanghai 201804,China;CCCC Shanghai Third Harbour Engineering Academy of Science Co. Ltd.,Shanghai 200032,China)
出处
《新型建筑材料》
北大核心
2019年第4期1-4,共4页
New Building Materials
基金
国家自然科学联合基金项目(U1534207)
国家自然科学基金项目(51678441)
上海市经信委专项资金项目(沪CXY-2016-012)
关键词
港珠澳大桥
挡浪墙
清水混凝土
足尺寸模型
冷却水管
Hongkong-Zhuhai-Macao Bridge
protection wall
fair-faced concrete
full-scale model
cooling water pipe
