Connection construction method of urban high-water-level large-diameter reinforced concrete sewage pipeline

Abstract

The invention discloses a connection construction method of an urban high-water-level large-diameter reinforced concrete sewage pipeline. The connection construction method comprises the steps that step 1, a receiving well is built at an existing pipeline connection point; step 2, a reinforced concrete bottom plate is poured into the receiving well, and concrete encapsulation is conducted on the bottom of the existing pipeline; step 3, a walling crib of an inspection well chamber is constructed in the receiving well; step 4, concrete is poured between the exterior of the walling crib of the inspection well chamber and the inner wall of the receiving well; step 5, a wire saw working platform is erected at a wellhead of the receiving well; step 6, four cutting holes and two hoisting holes are drilled in the existing pipeline; step 7 to step 11, a frogman penetrates through a diamond chain of a wire saw in the cutting holes of a connection opening, and then outline wire cutting of the whole connection opening is conducted through the wire saw; and step 12, a concrete block of the connection opening of the existing pipeline is hoisted out of the inspection well chamber through a crane,connection opening breaking is completed, and connection of the existing pipeline and a newly-built pipeline is achieved. The connection construction method of the urban high-water-level large-diameter reinforced concrete sewage pipeline has the advantages of safety in operation, no disturbance to a cut body and the like.

Description

technical field [0001] The invention relates to a connection construction method of urban high-water-level and large-diameter reinforced concrete sewage pipelines. Background technique [0002] The problem of urban black and odorous water bodies is a difficult problem that needs to be solved today. Due to the widespread misconnection and random connection of rainwater and sewage pipes, sewage enters the rainwater pipe and is directly discharged into the river, which affects the water quality of the river; or rainwater enters the sewage pipe, which makes the water level of the sewage pipe high and the sewage is diluted, affecting the normal operation of the sewage treatment plant. Based on this, it is very important to improve the pipe network system to realize the diversion of rain and sewage. [0003] In the construction of improving the pipe network system, the connection of new and old sewage pipes is involved, and most of the existing reinforced concrete sewage main pip...

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Problems solved by technology

[0003] In the construction of improving the pipe network system, the connection of new and old sewage pipes is involved, and most of the existing reinforced concrete sewage main pipes are at high water levels, and the operation cannot be interrupted, that is, blocked unconditionally. However, it is more difficult to break the existing pipeline under the condition of non-stop water supply

If the joints of the existing pipelines are cut by means of conventional pneumatic pick joints and knife entrenched cutting, not only the equipment is easily damaged or washed into the downstream pipelines, but also the broken concrete blocks are easily washed downstream by the rapid water flow. Cause later pipeline blockage

In addition, if the connection port is located on the traffic lane in the middle of the municipal road, it will also be limited by the construction conditions on site.

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