软土地基大口径PCCP管设计及修复

Design and Repair of Large-Diameter PCCP Pipes in Soft Soil Foundation

文章以宁波市周公宅、皎口水库引水及城市供水环网工程为例,介绍了在软土地基中铺设DN2600大口径PCCP管设计中的重点和难点,特别针对某些突发情况导致PCCP管接口松脱漏水情况,采用内衬钢管内部修复,能够满足密封防水的要求,同时可以避免开挖影响周边环境,施工方便,是可行的PCCP管道接口漏水的修复补漏方法,能够对类似工程提供借鉴。

Taking the water diversion project of Zhougong Mansion,Kyaukkou Reservoir and urban water supply ring network project in Ningbo City as an example,this paper introduces the key points and difficulties in the design of laying DN2600 large-diameter PCCP pipe in soft soil foundation,especially for the loose leakage of PCCP pipe interface caused by some emergencies,introduces a kind of internal repair of lined steel pipe,which can meet the requirements of sealing and waterproofing,and can avoid excavation affecting the surrounding environment,and is convenient for construction,which is a feasible repair method for repairing and repairing the leakage of PCCP pipe interface leakage.It can be used as a reference for similar projects.