CHUXin-peng,LIUJun,SUJin-long,et al.Application of Combined Trenchless Process for Repairing Small Diameter Drainage Pipe Collapse[J].China Water & Wastewater,2025,41(8):120-123.
Application of Combined Trenchless Process for Repairing Small Diameter Drainage Pipe Collapse
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第8期
Page:
120-123
Column:
Date of publication:
2025-04-17
- Abstract:
- The CCTV inspection of 15 road sewage pipes in the South Lake area of Wuhan found 52 serious defects mainly consisted of collapse and rupture of grade Ⅲ or above, which cannot be repaired directly through traditional trenchless processes and did not have the conditions for excavation construction. To address the serious deformation and collapse of small diameter drainage pipes, a trenchless repair process combining the fractured pipe short pipe splicing method and ultraviolet in-situ curing technology was proposed and implemented. The appearance quality and water closure test of the repaired sewage pipe both meet the design and specification requirements. After one year of operation, the function and structure of the pipeline are intact, without breakage, cracking or collapse, and with smooth drainage. The comprehensive cost of the process is about 6 941.74 yuan/m.
Last Update:
2025-04-17