ZHENGQuan-xing.Construction Difficulties and Solutions of Long?distance Large Diameter Steel Pipe under Bridge[J].China Water & Wastewater,2022,38(6):123-126.
Construction Difficulties and Solutions of Long?distance Large Diameter Steel Pipe under Bridge
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第6期
Page:
123-126
Column:
Date of publication:
2022-03-17
- Keywords:
- bridge; cantilever working platform; large diameter steel pipe; support; welding; hoisting
- Abstract:
- A DN800 steel pipe is hung under Guangling Bridge. The bridge body is flat and smooth, with no ideal support point. The construction staff cannot enter the bridge to work without the help of external conditions. The auxiliary construction method of cantilever working platform and counterweight trolley was adopted to solve the problems of bracket installation, pipe hoisting in place, pipe butt welding and so on. Before adopting the single-sided welding and double-sided forming welding method, the welding test was carried out, and the welding instruction was compiled. According to the welding instruction, the defects of single-sided welding and double-sided forming were overcome, and the quality of the weld was ensured. The reasonable setting of the expansion joint successfully solved the problem of pipeline expansion and deformation. After two tests in extremely cold weather, the pipeline ran smoothly, ensuring the normal supply of water.
Last Update:
2022-03-17