虽然超大口径PCCP管道已经广泛应用在国内的大型调水工程中，但其断丝修复技术尚不成熟，针对断丝修复的效果分析甚少，基于工程实践的相关文献也屈指可数。国内某超大口径PCCP输水工程已出现多处预应力钢丝断裂现象，为了避免中断供水，除了在PCCP管的断丝区域黏贴碳纤维布并表面涂刷环氧涂层的补强加固措施外，还新增管道上方土体沉降监测、地下水位监测、实时断丝监测等措施进行监控保护。详细介绍了断丝修复后的保护方式，并通过监测数据分析修复效果，以期将这种技术更多地应用到工程实践中。
Abstract
Although ultra-large diameter PCCP pipeline has been widely used in large-scale water diversion projects in China, its wire breakage repair technology is still immature, and there is little analysis on the effect of wire breakage repair, and there are few related literatures based on engineering practice. Fracture of prestressed steel wire has been already appeared in a ultra-large diameter PCCP Water Conveyance Project in China, In order to avoid interruption of water supply, in addition to the reinforcement measures of pasting carbon fiber cloth and coating epoxy coating on the broken area of PCCP pipe, measures such as soil settlement monitoring, groundwater level monitoring and real-time wire breakage monitoring are added to monitor and protect the ultra-large diameter PCCP water conveyance project. The protection method after wire breakage repair is introduced in detail, and the repair effect is analyzed by monitoring data, in order to apply this technology to engineering practice more.
关键词
预应力钢筒混凝土管道PCCP /
断丝修复 /
监测效果分析
{{custom_keyword}} /
Key words
PCCP /
broken wire repair /
monitoring effect analysis
{{custom_keyword}} /
基金
北京市科技计划项目( Z171100000517007) ; 北京建筑大
学研究生创新项目( PG2019044)
{{custom_fund}}
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1]张海丰, 董顺, 周维, 等. 预应力钢筒混凝土管（PCCP）结构修复更新技术介绍[J]. 给水排水, 2017,43(8):104-108.
[2]熊欢. 南水北调超大口径PCCP预应力分析模型与试验研究[D]. 北京: 清华大学, 2010.
[3]ATHERTON D L, MORTON. Detecting breaks: in prestressing pipe wire[J]. Journal (American Water Works Association), 2000,92(7):50-56.
[4]王东黎, 徐志刚. 南水北调大型埋地PCCP工程耐久性设计[J]. 水利水电技术, 2012,43(4):53-53.
[5]LEE Y, LEE E T. Analysis of prestressed concrete cylinder pipes with fiber reinforced polymer[J]. KSCE Journal of Civil Engineering, 2015,19(3):682-688.
[6]HAJALI M, ALAVINASAB A, SHDID C A. Effect of the location of broken wire wraps on the failure pressure of prestressed concrete cylinder pipes[J]. Structural Concrete, 2014,16(2):297-303.
[7]ALAVINASAB A, PADEWSKI I E, HIGGINS M, et al. Crack propagation in prestressed concrete noncylinder pipe using finite element method[C]∥ Pipelines Conference 2011. Seattle: American Society of Civil Engineers, 2011.
[8]BEHE M M, SHIRK D W. Repair and rehabilitation of the failed WSSC northwest branch PCCP interceptor[J]. Proceedings of the Water Environment Federation, 2009,10(16):1 304-1 307.
[9]HIGGINS M, PAULSON P O. Fiber optic sensors for acoustic monitoring of PCCP[C]∥ Pipelines Conference 2006. Chicago: American Society of Civil Engineers, 2006.
[10]ZARGHAMEE M S, EGGERS D W, OJDROVIC R, et al. Risk analysis of prestressed concrete cylinder pipe with broken wires[C]∥ Pipelines Conference 2003. Baltimore: American Society of Civil Engineers, 2003.
[11]ESSAMIN O, El-SAHLI K, HOVHANESSIAN G, et al. Risk management system for prestressed concrete cylinder pipeline: practical results and experience on the great man made river[C]∥ Pipelines Conference 2005. Houston: American Society of Civil Engineers, 2005.
[12]HUANG J, ZHOU Z, WEN X, et al. A diaphragm-type fiber Bragg grating pressure sensor with temperature compensation[J]. Measurement, 2013,46(3):1 041-1 046.
[13]胡赫. CFRP修复预应力钢筒混凝土管（PCCP）内压试验与数值分析[D]. 北京: 中国水利水电科学研究院, 2017.
[14]骆建军, 姚宣德, 张东生,等. 大口径PCCP管道断丝频谱响应现场试验研究(Ⅰ)[J]. 土木工程学报, 2016,49(9):110-116.
[15]张霄杰, 滕海文, 代春生. 预应力钢丝断丝对PCCP性能的影响[J]. 人民黄河, 2014,36(3):138-140.
[16]王五平. 管道探测新技术[J]. 中国水利, 2007(22):71-71.
[17]GALLEHER, JOHN J, SRIFT, et al. Internal inspection and database development of PCCP[C]∥ Pipelines Conference 1998. San Diego: American Society of Civil Engineers, 1998.
[18]KONG X J. 自由游动检测仪对大直径PCCP管的现场检测[C]∥ 非开挖技术会议. 武汉：中国地质学会非开挖技术委员会, 2011.
[19]骆建军, 姚宣德. 基于AHP法的大口径PCCP管道断丝安全风险管理[J]. 土木建筑与环境工程, 2016,38(3):65-72.
[20]姚宣德. 北京市南水北调配套工程PCCP管道断丝、漏水实时监测集成系统 [J]. 水利水电技术, 2016,47(10):67-72.
[21]窦铁生, 燕家琪. 预应力钢筒混凝土管（PCCP）的破坏模式及原因分析[J]. 混凝土与水泥制品, 2014,40(1):29-33.
PDF(698 KB)
鄂公网安备 42010602001274号 鄂ICP备14015464号-1