A connection construction method of urban high-water-level and large-diameter reinforced concrete sewage pipelines

Abstract

The invention discloses a connection construction method of urban high-water-level and large-diameter reinforced concrete sewage pipelines, which includes: step 1, first constructing a receiving well at the connection point of the existing pipeline; step 2, pouring a reinforced concrete bottom plate in the receiving well, and Carry out concrete encapsulation to the bottom of the existing pipeline; Step 3, build the well circle of the inspection well chamber in the receiving well; Step 4, pour concrete between the well circle of the inspection well chamber and the inner wall of the receiving well; Step 5, in the Set up a wire saw working platform at the wellhead of the receiving well; step 6, drill four cutting holes and two hoisting holes on the existing pipeline; The diamond chain, and then use the wire saw to cut the outline of the entire connection port; step 12, lift the concrete block of the connection port of the existing pipeline out of the inspection well room by the crane, complete the removal of the connection port, and realize the existing The pipeline is connected to the new pipeline. The invention has the advantages of safe operation, no disturbance to the 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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