大口径球墨铸铁管在沉管施工中的创新性应用  

Innovative Application of Large‑diameter Ductile Iron Pipe in Immersed Pipe Construction

作　　者：杨贺 黄跃明 胡金财 张智军 赵健 史卫斌 YANG He;HUANG Yue‑ming;HU Jin‑cai;ZHANG Zhi‑jun;ZHAO Jian;SHI Wei‑bin(Wuxi Urban and Rural Water Supply&Drainage Engineering Design Institute Co.Ltd.,Wuxi 214000,China;Xinxing Ductile Iron Pipes Co.Ltd.,Nanjing 210000,China;Wuxi Water Group Co.Ltd.,Wuxi 214000,China)

机构地区：[1]无锡市城乡给排水工程设计院有限责任公司,江苏无锡214000 [2]新兴铸管股份有限公司,江苏南京210000 [3]无锡市水务集团有限公司,江苏无锡214000

出　　处：《中国给水排水》2023年第16期135-139,共5页China Water & Wastewater

摘　　要：长期以来,钢管在国内大口径过河管沉管施工中被广泛应用,但其防腐施工要求高,焊缝防腐质量控制难度大,限制了管道的使用寿命,增加了运维成本和漏损风险。无锡严埭河DN800给水管沉管工程经过力学性能、耐腐蚀性和电蚀性、综合性价比以及接口形式等多方面分析比较,最终选择采用SIA Wb型内自锚接口球墨铸铁管作为管材,并对影响工程成功实施的3个要点——吊点设置间距、接口结构安全和胶圈有效性以及管道弯头处加固处理进行分析总结,可为今后类似工程实施提供借鉴。For a long time,steel pipe has been widely used in the construction of large‑diameter river crossing and submerged pipes in China,but the high anti‑corrosive construction requirements and the difficult control of weld anti‑corrosion limits the service life of the pipeline,increases operation,maintenance costs and leakage risk.By analyzing and comparing the mechanical performance,corrosion resistance and electric corrosion resistance,comprehensive cost,and interface form,SIA Wb ductile iron pipe with internal self‑anchor interface is selected as the pipe material for DN800 water supply sinking project in Yandai River in Wuxi.Three key points affecting the successful implementation of the project are summarized:the spacing of lifting points,the safety of interface structure,the effectiveness of rubber rings,and the reinforcement treatment of pipe elbows,which can provide reference for the implementation of similar projects in the future.

关 键 词：球墨铸铁管 沉管 大口径 内自锚接口 

分 类 号：TU991[建筑科学—市政工程]