Technique of steep slope pipe-slipping construction in the 2nd West-to-East Gas Pipeline Project

The main process for the pipe-slipping construction method is as main pipe prefabrication and pipe end preparation, anticorrosion layer protection, pipe slipping construction, pipe connection on the slope top. This paper describes construction technology requirements, introduces quality requirements and safety protection measures for steep-slope pipe-slipping construction, and puts forward the following recommendations, including slope ratio experiments before trench excavation, measuring the depth of the trench and slope in a timely manner after beginning to excavate the trench, and determining practical safety measures for cross-operation. This method has been successfully applied in Bid Section 13B, 15B of eastern section in the 2nd West-to-East Gas Pipeline Project, and can be a reference for steep slope section construction for large-diameter long-distance pipelines.