球墨铸铁管漂管问题处理措施探讨OA

Under.When water pipelines are constructed in the rainy season,the pipe trench often fails to be back-filled to the design elevation in a timely manner.Rainwater consequently accumulates in the foundation pit,leading to pipe submersion and flotation,which can cause the bell-and-spigot joints to deflect,shift,or become disconnect-ed.There is still no established principles for dealing with the various problems caused by water accumulation in the pipe foundation pit.For the Longgang New District branch of Guangxi Water Resources Allocation Project around Beibu Gulf,this paper proposes the corresponding treatment measures for the ductile iron pipe deformation and shift caused by water accumulation in pipe trench pit.Precautions to prevent pipe flotation are formulated.The paper also discusses the appropriate deflection angle to be used as a threshold for pipe extraction in cases of small-angle joint deflection induced by trench flooding.