Pipeline removing and installing construction method in narrow space

Abstract

The invention discloses a pipeline removing and installing construction method in a narrow space. According to the construction sequence, the pipeline removing and installing construction method specifically comprises the steps of construction equipment, transportation and hoisting tool fabrication, pipeline removing, removed pipeline carrying, newly-built pipeline transportation, pipeline assembly and installation and test. According to the pipeline removing and installing construction method in the narrow space, pipelines which need to be replaced and pass through the narrow space are laid by adopting buttresses in the narrow space, the pipelines which need to be removed are laid at the lower layer of one side inside a tunnel, and the newly-built pipelines are laid at the upper layers ofpipe piers. The pipeline removing and installing construction method in the narrow space is mainly aimed at the technical deficiencies existing in current construction of laying and replacing the pipelines in the narrow space such as the long and narrow tunnel, the corresponding removing method is adopted for removing of the pipelines in the special environment, and in the situation of guaranteeing pipe removing safe operations, the rapid and effective removing of the pipelines inside the tunnel is realized; and meanwhile, the newly-built pipelines are transported to to-be-installed positionsby utilizing a trolley, and the pipelines are lifted to installation positions to be installed through a lifting device, so that the oil-conveying pipeline laying, transportation, welding and other process technical requirements are realized.

Description

technical field [0001] The invention belongs to the technical field of pipeline construction, in particular to a construction method for removing and installing pipelines in a narrow space. Background technique [0002] At present, the scale of domestic petrochemical long-distance pipelines is increasing day by day, and the construction volume of installing and replacing pipelines in various tunnels will continue to increase. The technology of laying pipelines in large tunnels has become increasingly mature, but laying and replacing pipelines in narrow tunnels The construction technology seems to be unable to keep up with the development of the current long-distance pipeline laying. [0003] For example, most of the pipelines in a certain project are laid underground. In the cross-country pipeline project, a DN200 oil pipeline connecting the operation area and the oil storage area needs to be replaced. The length is about 2500 meters. Most of the pipeline is laid on pipe pie...

AI Technical Summary

Problems solved by technology

The pipeline laid on the pipe pier on the ground passes through the land of adjacent villagers and is far away from the road, so it cannot be hoisted in place by lifting equipment, and transportation is difficult; the pipeline laid in the tunnel and cover ditch is far away from the road and cannot be lifted Heavy equipment hoisting in place, difficult to transport

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