Construction method for connecting new sewage pipes to existing sewage pipes

Abstract

The invention discloses a connection construction method between a newly built sewage pipe and an existing sewage pipe, which comprises a new connection transition well, soil reinforcement between the wells, horizontal excavation of steel pipe sleeves, design pipeline construction, and the existing sewage well and connection transition well Through construction. The present invention builds a connection transition well outside the existing sewage well, connects the new sewage pipe with the connection transition well, and then tunnels horizontally through the connection transition well and the existing sewage well through the ultra-short-range pipe jacking construction method, so that both The successful connection between existing sewage pipes and newly-built sewage pipes has the advantages of simple operation, strong practicability, high construction efficiency, and low safety risks.

Description

technical field [0001] The invention relates to municipal pipeline construction, in particular to a construction method for connecting new sewage pipes to existing sewage pipes. Background technique [0002] In the process of municipal pipeline construction, new sewage pipelines often need to be connected with existing sewage pipelines through connection construction. Pipeline connection has always been an important and difficult point in municipal pipeline construction. Especially the connection construction between the main and secondary main pipes of sewage, due to the complex working environment in the main sewage main pipe, the deep embedding of the pipes, the large sewage flow rate, and the fast flow rate, etc., brought great challenges to the connection construction of the pipes. Difficulty and quality and safety risks. Generally, there are two processes for connection construction of sewage pipes: 1. Use the existing sewage well 1 of the existing sewage pipe 2 as th...

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Problems solved by technology

[0003] The above two connection processes are widely used in the construction of municipal pipelines, but both have their own limitations. The first connection process: 1) The amount of sewage regulation and discharge is large, and the purchase of water pumps and discharge pipelines is one-time. Large investment; 2) If the construction site is located in an urban area, it is not convenient to carry out the sewage regulation and discharge work. If the specification and model of the drainage pump do not match the flow rate of the municipal pipeline, it is easy to cause flooding, and the risk of public opinion is relatively high; 3) Temporary blockage is generally The air bag is used for underwater plugging. After plugging, the water level difference between the upstream and downstream of the target well is large, and the air bag is at risk of bursting. The safety of the operators in the well cannot be guaranteed.

The second connection process: 1) The position of the existing sewage pipeline is often not accurately located, and the position of the riding well is difficult to grasp; 2) The newly built riding well must include part of the existing pipeline, and at the same time ensure that the new pipeline has enough space. In this way, the size of the riding well is relatively large, and the construction period and cost are relatively large

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