A construction method for new pipe connection and original pipe plugging in large-scale sewage pipeline relocation

Abstract

The invention provides a construction method for new pipe connection and original pipe plugging in large-scale sewage pipeline relocation. The construction method comprises the following steps: firstly, a new pipe receiving well is constructed beside an existing working well adjacent to the original sewage pipe, and the shaft wall of the existing working well is sawn, so that the new pipe receiving well is communicated with the existing working well; and then the original sewage pipe is temporarily plugged by adopting temporary plugging gate in the existing working well, wherein the temporaryplugging gate comprises a grille steel frame and a steel baffle. After the temporary plugging gate is installed, the diver goes down the shaft and plugs the original sewage pipe at the downstream partof the temporary plugging gate with brick masonry stone. After the plugging is completed, the underwater concrete is poured between the temporary gate valve and the plugs. The method adopts a temporary gate for temporary blocking, which can reduce the impact force of water flow on the diver and the blocking wall, reduce the operation risk, improve the blocking construction quality, and reduce theconstruction risk in the excavation process of the deep foundation pit of the metro.

Description

technical field [0001] The invention relates to the connection of old and new pipelines and the plugging construction of the original pipeline after the relocation of large-scale sewage pipelines. Specifically, it is a method of constructing a new pipe receiving well outside the existing sewage working well, and connecting the new pipe receiving well with the original pipeline. The pipe work well is connected, and then a temporary ram is set in the original pipe work well to create a safe environment for divers to work underwater, and then the sewage pipe is blocked. Background technique [0002] With the rapid development of urban subways, during the subway construction process, there are often large sewage pipes across the station foundation pit. The most critical steps in the relocation process are the connection and sealing construction. Many projects have blocked the original pipes. If it is not in place, water leakage accidents will occur during the excavation of the f...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of urban subways, during the subway construction process, there are often large sewage pipes across the station foundation pit. The most critical steps in the relocation process are the connection and sealing construction. Many projects have blocked the original pipes. If it is not in place, there will be a water leakage accident during the excavation of the foundation pit in the later stage

The plugging construction must be carried out by divers underwater. However, for large sewage pipelines, due to the strong impact force of the water flow, they do not have the conditions for diving operations at all. Therefore, how to ensure the sealing quality of the original pipeline after the large sewage pipeline is relocated becomes the primary solution. the puzzle

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