Large Water Supply Pipe Line Construction Key Points And Management

City water supply pipeline construction of large often encountered on the destruction of the building and the city road traffic blockage problem, as the trenchless technology pipe jacking technology completely solves these problems, and in the stability of soil and environmental protection to highlight its advantages.Based on an actual project data collection and analysis of field survey inHangzhou City, large diameter pipe jacking engineering construction mainly has the following problem:because of the traditional steel pipe welding efficiency is low cause the entire construction period is longer; underground unknown pipeline and obstacle to the construction difficulties, once encounter various underground obstacles will affect the entire pipe jacking construction, such as extending throughout the construction period, construction investment increased, even the whole project stagnation.In order to solve the problems faced by the construction of pipe jacking, the paper puts forward the main solutions:Based on the pipe jacking engineering construction time limit for a project of the analysis of the main factors, the use of advanced technology of CO2gas shielded arc welding and improvement of sealing device in portal construction period is shortened; the underground obstacles met unknown underground pipeline processing and emergency measures, reasonable application of curved pipe jacking avoid barriers, optimization of jacking path and effective protection of underground pipeline.Responsible and participation of the two pipe jacking project case analysis, elucidation of CO2gas shielded welding principle and process, summed up and meet the underground obstacles and underground pipeline processing scheme for pipe jacking construction, And the detailed introduction of curved pipe jacking construction technology, provide a reference, shorten the pipe jacking construction period and underground obstacles in the treatment and protection of underground pipe.