Drain pipe underwater connection construction method

Abstract

The invention provides a drain pipe underwater connection construction method. The method comprises the following steps that a new drain pipe is arranged, and the two ends of the new drain pipe extendto the position of an old drain pipe; jet grouting piles are built at the two ends of the new drain pipe, and a connection well is dug in each jet grouting pile through a top-down construction method; the reinforced concrete structure between the new drain pipe and the old drain pipe is forcibly broken underwater, and the new drain pipe is communicated with the old drain pipe; after most of sewage in the old drain pipe is discharged from the new drain pipe, the two ends of the old drain pipe are blocked underwater, and the old drain pipe is removed. The method has the advantages of being highin safety and reliability, high in universality, high in construction efficiency and the like.

Description

technical field [0001] The invention relates to the field of drainage pipe connection, in particular to a construction method for underwater connection of drainage pipes. Background technique [0002] In recent years, the phenomenon of "every rainstorm will cause waterlogging" has gradually evolved into one of the problems in large and medium-sized cities. The low design standards of the existing urban drainage pipe network and the failure of urban infrastructure to keep up with the development have become the main factors causing urban waterlogging. In order to improve the waterlogging prevention standard of the drainage pipe network, the existing method is to merge the new drainage pipe into the original drainage pipe network and put it into operation. The connection work of the pipe network needs to divert or intercept the sewage of the original drainage pipe , so that the connection position is in an environment with no water or little water to carry out the connection ...

AI Technical Summary

Problems solved by technology

[0003] (1) When encountering special circumstances such as the inability to divert flow due to surrounding environmental constraints, the inability to divert flow or stop operation during flood seasons and important rivers, the existing connection method cannot be used for the connection construction of the old and new pipe networks;

[0004] (2) Pumping out the old drainage pipes or using cofferdams to intercept and divert the flow requires a large amount of work and a long connection time, resulting in high construction costs and low construction efficiency;

[0005] (3) Suspension of water connection makes it inconvenient for enterprises and residents along the line to use water, and brings huge economic losses to enterprises;

[0006] (4) Unfavorable factors such as a large amount of toxic and harmful substances or toxic, flammable and explosive gases exist in the old drainage pipes. Operators working underwater in a limited space are likely to cause safety accidents such as poisoning, suffocation, and explosion, which has become a major hazard in the drainage pipe connection process. source

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