JIANGWang,SHIHong-tao,XIAOZi-hao,et al.Application of Steel Sleeve and Thermoplastic Molding Combined Process in Trenchless Repair of Drainage Pipes[J].China Water & Wastewater,2024,40(10):121-125.
钢套筒和热塑成型工艺联用于排水管道非开挖修复
- Title:
- Application of Steel Sleeve and Thermoplastic Molding Combined Process in Trenchless Repair of Drainage Pipes
- Keywords:
- drainage pipe; trenchless restoration; steel sleeve; thermoplastic molding process; functional defect; structural defect; flow capacity
- 摘要:
- 非开挖修复技术因其环境影响小、施工工期短、成本低等优点而受到广泛关注。实际施工过程中，往往采用单一非开挖修复技术对缺陷管道进行修复，采用组合式非开挖修复技术的案例较少。重庆市某区县城市排水管道修复工程采用钢套筒和热塑成型联合工艺对三、四级结构性缺陷进行非开挖修复，介绍了该工艺的技术原理、施工步骤、质量控制及验收情况，并对修复效果、过流能力、造价等进行了分析。结果表明，采用钢套筒和热塑成型工艺修复后管道内壁光滑，无渗漏点，管道修复后与修复前的过流能力比值为103%，过流能力略有提高。以DN600的管道为例，综合修复单价为6 096 元/m。
- Abstract:
- Trenchless restoration technology has been widely concerned because of its advantages such as low environmental impact, short construction period and low cost. In the actual construction process, the single trenchless repair technology is often used to repair the defective pipeline, while the combined technology is rarely used. The combined process of steel sleeve and thermoplastic molding is adopted to repair the third and fourth grade structural defects of drainage pipes in a district of Chongqing. The technical principle, construction steps, quality control and acceptance of this process are elaborated, and the repair effect, flow capacity and cost are analyzed. The results show that the inner wall of the pipeline is smooth and there is no leakage point after the repair by the steel sleeve and thermoplastic molding process. The ratio of the flow capacity of the pipeline after and before repair is 103%, and the flow capacity is slightly improved. Taking the DN600 pipeline as an example, the comprehensive repair price is 6 096 yuan/m.
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