Mounting and construction method of U-shaped tunnel pipelines

Abstract

The invention discloses a mounting and construction method of U-shaped tunnel pipelines. The method comprises the following steps of: mounting pipelines of a left inclined shaft section firstly and meanwhile, carrying out pipeline transportation and distribution of a level section; after the pipeline transportation and distribution of the level section is finished, mounting pipelines of a right inclined shaft section; and finally, connecting the heads on the level section to run through, wherein the pipeline mounting of the inclined shaft sections comprises the following steps of: laying a light rail through the whole course at the bottom of the tunnel; then embedding a ground anchor, fixing a winding machine and beginning to excavate a working pit; mounting a hoop and a sled on a pipeline; connecting a pulley block with the ground anchor, the pipeline, the loop and the winding machine; ensuring that the pipeline downwards slides along the light rail through the sled until the upper port of the pipeline arrives at the working pit; then continuing to mount another pipeline; and repeating in such a way until the inclined shaft pipelines and the level pipelines are butt jointed. In the construction method, the operations of welding, flaw detecting and joint repairing aiming at the inclined shaft pipelines are all finished outside the port of the tunnel, thereby avoiding the construction in the tunnel, improving the construction safety, reducing the labor intensity and being beneficial to improving the welding quality, shortening the construction period and saving the construction cost.

Description

technical field [0001] The invention relates to an installation and construction method of a large-diameter pipeline, in particular to a U-shaped tunnel pipeline installation and construction method with a long inclined shaft section. Background technique [0002] At present, for the installation of pipelines in U-shaped tunnels, the construction method of installing them from bottom to top is usually adopted in the tunnel. Disadvantages: (1) The construction personnel will install the pipeline in the tunnel throughout the whole process, which has a great potential safety hazard. Once there is poor ventilation, foreign objects or landslides, safety accidents will occur. The construction safety problems of the bare tunnel section and the initial branch section are particularly prominent. ; (2) The humidity in the tunnel is relatively high, which greatly affects the quality of welding and patching; (3) Due to space constraints in the tunnel, mechanical equipment cannot be used...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that in the existing U-shaped tunnel pipeline installation and construction method, the construction personnel install the whole process in the tunnel, the safety hazard is large, the construction period is long, and the installation quality is difficult to guarantee. The present invention provides a U-shaped tunnel pipeline installation and construction method. The pipe welding of the well section is done outside the tunnel

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