Pipeline changing method for trenchless construction

Abstract

The invention relates to the technical field of underground laying or recovery of pipelines in a trenchless manner and discloses a pipeline changing method for trenchless construction. The method comprises the steps as follows: Step 1, a main working pit and an auxiliary working pit are excavated; Step 2, a drilling rod is drilled into the auxiliary working pit to penetrate through a to-be-changed old pipeline and extends out of the main working pit; Step 3, a pipeline ramming hammer is connected with a push baffle; Step 4, an air compressor introduces high-pressure air into the pipeline ramming hammer through a drilling machine and the drilling rod; Step5, one end, located inside the main working pit, of the drilling rod is connected with the pipeline ramming hammer; Step 6, a pipeline push head sleeve is clamped with the to-be-changed old pipeline; Step 7, the pipeline ramming hammer is connected with a to-be-changed new pipeline; Step 8, the air compressor outputs the high-pressure air to the pipeline ramming hammer; Step 9, the drilling rod pulls the pipeline ramming hammer, the pipeline ramming hammer pushes the push baffle, and the push baffle pushes the to-be-changed old pipeline. According to the construction method, the construction technology is simple, the labor intensity of workers is reduced, the oil pipeline is recovered, and the quality of the construction surface building is not affected.

Description

technical field [0001] The invention relates to the technical field of laying or recovering pipelines in an underground trenchless manner, in particular to a pipeline replacement method for trenchless construction. Background technique [0002] In the prior art, in the process of replacing underground pipelines, in order to avoid the defects of hindering traffic, affecting the surrounding environment and low construction efficiency, the replacement or recycling pipelines are usually laid in a non-excavation manner. In the process of pipe replacement without excavation, a device for crushing old pipes is usually installed at the front end of the rammer. After the old pipes are broken, the pipe rammer is used to expand the capacity, pull new pipes, and lay new pipes. Especially in the process of increasing capacity and replacing pipelines, if the old pipelines to be replaced are smashed, the residues of the old pipelines will occupy the foundation space where the pipelines are...

AI Technical Summary

Problems solved by technology

Especially in the process of increasing capacity and replacing pipelines, if the old pipelines to be replaced are smashed, the residues of the old pipelines will occupy the foundation space where the pipelines are located, and the foundation occupied by the new pipelines will be larger than that occupied by the old pipelines, which will seriously affect the density of the foundation space and prone to surface swelling. affect the quality of ground buildings

[0003] It can be seen that in the prior art, in the construction method of smashing the old pipeline, the old pipeline cannot be discharged, and the residue of the old pipeline will occupy the foundation space, which will easily cause the surface to bulge and affect the quality of the surface construction.

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