PCCP管芯混凝土防裂控裂技术研究进展  

Research Progress on Crack Prevention and Control Technology of PCCP Core Concrete

作　　者：张晓闯 刘芃呈 张慈沁 陈波[1] 李军[1] 王雄锋 ZHANG Xiao-chuang;LIU Peng-cheng;ZHANG Ci-qin;CHEN Bo;LI Jun;WANG Xiong-feng(The National Key Laboratory of Water Disaster Prevention,Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu Province,China;Guangdong Yuehai Yuexi Water Supply Company Limited,Zhanjiang 524000,Guangdong Province,China;POWER CHINA Zhongnan Engineering Corporation Limited,Changsha 410014,Hunan Province,China)

机构地区：[1]南京水利科学研究院水灾害防御全国重点实验室,江苏南京210029 [2]广东粤海粤西供水有限公司,广东湛江524000 [3]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《中国农村水利水电》2024年第7期142-149,共8页China Rural Water and Hydropower

基　　金：国家自然科学基金重点项目(51739008);江苏省自然科学基金资助项目(BK20201125)。

摘　　要：预应力钢筒混凝土管(PCCP)在我国引调水工程中发挥着重要作用,PCCP运行的安全性对水资源的配置至关重要,关系国计民生。当管芯混凝土内表面产生有害裂缝后,在水压力的作用下会引起内管芯混凝土破坏,导致钢筒被锈蚀,形成安全隐患,因此,针对管芯内壁混凝土裂缝预防和控制的研究对水资源的合理利用具有重大意义。为了预防和减少PCCP内壁出现有害裂缝,根据国内外学者的研究成果,概述了PCCP管芯内壁混凝土裂缝的种类和形式,即纵向裂缝、螺旋裂缝和插口端裂缝;总结了干燥收缩、沉降收缩、温度收缩、焊缝、缠丝应力、吊装运输等因素与PCCP内壁混凝土裂缝的关系;分别从PCCP设计、原材料、配合比、养护制度、焊缝、钢筒、插口和裂缝自愈合、纤维增强材料等方面总结了PCCP管芯内壁裂缝的预防和控制方法。最后,对PCCP管芯混凝土内壁裂缝的控制和预防进行了展望,为继续研究提供思路。Prestressed concrete cylinder pipe(PCCP)plays an important role in China′s water diversion projects.The safety of PCCP oper⁃ation is very important to the allocation of water resources and is related to the national economy and people′s livelihood.When harmful cracks occur on the inner surface of the core concrete,the inner core concrete will be damaged under the action of water pressure,resulting in the corrosion of the steel cylinder and the formation of safety hazards.Therefore,research on the prevention and control of concrete cracks on the inner wall of the core is of great significance to the rational utilization of water resources.In order to prevent and reduce harmful cracks on the inner wall of PCCP,according to the research results of scholars at home and abroad,the types and forms of concrete cracks on the in⁃ner wall of PCCP core are summarized,including longitudinal cracks,spiral cracks and socket cracks.The relationship between factors such as drying shrinkage,settlement shrinkage,temperature shrinkage,welding seam,winding stress,hoisting and transportation,and concrete cracks on the inner wall of PCCP is summarized.The prevention and control methods of cracks in the inner wall of PCCP core are summarized from the aspects of PCCP design,raw materials,mix ratio,maintenance system,weld,steel cylinder,socket and crack self-healing,fiber reinforced materials and so on.Finally,the control and prevention of cracks in the inner wall of PCCP core concrete are prospected,which provides ideas for further research.

关 键 词：预应力钢筒混凝土管(PCCP) 管芯内壁混凝土 裂缝 防裂控裂措施 裂缝的种类 

分 类 号：TU528.73[建筑科学—建筑技术科学]