墩墙根部设置延性超缓凝混凝土过渡层预防温度裂缝技术应用  

Application of temperature crack prevention technology by setting ductile super-retarding concrete transition layer at the root of pier wall

作　　者：朱炳喜 王琰 姜西坤 胡明凯 居强 朱维 ZHU Bingxi;WANG Yan;JIANG Xikun;HU Mingkai;JU Qiang;ZHU Wei(Jiangsu Water Conservancy Science Research Institute,Yangzhou 225002,China;Jiangsu Hydraulic Engineering Construction Co.,Ltd.,Yangzhou 225002,China;Nantong Tongyuan Construction Supervision Co.,Ltd.,Nantong 226006,China)

机构地区：[1]江苏省水利科学研究院,江苏扬州225002 [2]江苏省水利建设工程有限公司,江苏扬州225002 [3]南通通源建设监理有限公司,江苏南通226006

出　　处：《江苏水利》2022年第7期1-5,共5页Jiangsu Water Resources

基　　金：江苏省科技厅创新能力建设计划(BM2018028)。

摘　　要：墩墙混凝土温度裂缝带有普遍性,在墩墙根部浇筑一层延性超缓凝混凝土过渡层,能够减轻底板对墩墙早期外约束,减少温度应力,降低开裂风险。南通海港引河南闸站工程应用表明,拉应变可以降低83~135με,闸墩、站墩、出水池导流墩开裂面积降低47%~87%,并将有害裂缝转变为无害裂缝。The temperature crack of pier wall concrete is universal.Pouring a layer of ductile super retarding concrete transition layer at the root of pier wall can reduce the early external constraint of bottom plate on pier wall,reduce temperature stress and the risk of cracking.The application of Nantong Harbor South Gate Station project shows that the tensile strain can be reduced by 83~135με.The cracking area of gate pier,station pier and diversion pier of outlet tank is reduced by 47%~87%,and the harmful cracks are transformed into harmless cracks.

关 键 词：墩墙 延性超缓凝混凝土 温度裂缝 外约束 应用 

分 类 号：TV431[水利工程—水工结构工程]