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.
Application of Steel Sleeve and Thermoplastic Molding Combined Process in Trenchless Repair of Drainage Pipes
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第10期
Page:
121-125
Column:
Date of publication:
2024-05-17
- Keywords:
- drainage pipe; trenchless restoration; steel sleeve; thermoplastic molding process; functional defect; structural defect; flow capacity
- 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.
Last Update:
2024-05-17