Trenchless large-caliber water supply pressure pipeline rehabilitation construction method

Abstract

The invention discloses a trenchless large-caliber water supply pressure pipeline rehabilitation construction method. The trenchless large-caliber water supply pressure pipeline rehabilitation construction method comprises the steps that the two sides of a damaged pipeline are cut up; a working pit and a receiving pit are excavated in the head end and the tail end of the damaged pipeline correspondingly; a pipe jacking device is arranged in the working pit, lining pipes are pushed into the damaged pipeline through the pipe jacking device, glass reinforced plastic sand pipes and steel pipes arecombined to serve as the lining pipes, and sealing joints are arranged between the lining pipe sections, wherein the steel pipes are adopted as the lining pipes at the head end and the tail end of the damaged pipeline and pipe sections connected with branches, and after pushing in of the lining pipes is completed, clearances between the lining pipes and the damaged pipeline are blocked. The construction method is relatively simple, mature in process, economical and practical, and the rehabilitated pipeline has the advantages of being small liquid conveying resistance, good in corrosion resistance, long in service life and free of water quality pollution.

Description

technical field [0001] The invention relates to a non-excavation repair method for a water supply pressure pipeline, in particular to a non-excavation large-diameter water supply pressure pipeline repair construction method. Background technique [0002] Due to the vibration of ground vehicles, poor pipeline foundation and corrosion, underground pipelines will have cracks, damage, misalignment of pipe joints and corrosion in pipes, etc., so timely repairs are required. [0003] The common slotted pipeline repair construction method needs to "open the guts" of the road. This construction method not only has a long construction period and high cost, but also has a great impact on traffic, and produces a large amount of waste, which endangers the living environment. , The repair construction of large-caliber water supply pressure pipelines has a particularly serious impact on roads, traffic, and the environment. [0004] The non-excavation pipeline repair method is a relativel...

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Problems solved by technology

However, there are still some shortcomings in the existing trenchless pipeline repair methods, such as the patent No. ZL200410054201.6 "pipeline non-excavation reverse reverse lining repair technology", its obvious shortcomings such as: impregnation with thermosetting materials Large-diameter hoses are prone to hardening during construction, which often affects construction quality; a large amount of hot water is required during construction, so the loss of hot water is large; the process is complicated and costly; branch pipes are inconvenient to connect and have poor reliability

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