Pipe expanding type pipeline renewal construction method increasing stress relief holes

Abstract

The invention belongs to technical field of pipeline renewal construction, and discloses a pipe expanding type pipeline renewal construction method increasing stress relief holes. The method includesthe steps of construction preparation, construction surveying and setting out and on-site geophysical prospecting, setting of positioning observation points of road surface soil inlet and outlet points and surrounding pipelines, preparatory work before drilling, test drilling, drilling of the stress relief holes, old pipeline bursting extrusion, sending rack installation and dragging back pipelineracking, pipeline dragging back, slip casting and backfilling of the stress relief holes, on-site cleaning and physiognomy restoration. According to the method, soil displacement can be effectively reduced, and damage to surrounding structures is reduced; traffic impacts are reduced, and social benefits are good; land uplift is not caused, and secondary construction is reduced; the expansion rateof a renewed pipe diameter is larger and the soil density limit is reduced; and the construction period can be effectively shortened, the labor input is reduced, and the work efficiency is improved.Compared with a traditional cut and cover method, a pipe jacking method and a traditional pipe expanding method, the pipe expanding type pipeline renewal construction method has obvious improvements in economic benefits and social benefits and has obvious technical advancement.

Description

technical field [0001] The invention belongs to the technical field of pipeline renewal construction, and in particular relates to a pipe expansion type pipeline renewal construction method with stress release holes added. Background technique [0002] At present, the closest existing technology: With the development of urbanization, urban water consumption is increasing, and the drainage systems of many cities in our country are still old drainage facilities built many years ago. The system is still dominated by rain and sewage confluence pipes. The drainage standard is low, the design pipe diameter is small, the service time is long, and the pipes are easily damaged or blocked. It is difficult to meet the current urban drainage needs, and the old drainage pipes need to be renovated. . If the traditional open-cut and pipe-jacking construction method is used, a large number of demolition and traffic jams must be solved, because the planning of the old urban area is relative...

AI Technical Summary

Problems solved by technology

[0004] (1) The traditional pipe expansion method is likely to cause soil displacement and surface uplift or damage to surrounding facilities during the construction process

[0005] (2) It is very difficult to adopt the traditional open cut and pipe jacking construction methods

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