Municipal blowdown pipeline laying construction method

Abstract

The invention relates to a municipal blowdown pipeline laying construction method. The municipal blowdown pipeline laying construction method adopts a sectional continuous construction mode to carry out laying, and adopts bottom concrete cushion blocks and top concrete briquettes, which are prefabricated in advance, in the laying process of each section. The laying process of each section comprises: pouring and prefabricating a plurality of bottom concrete cushion blocks and a plurality of top concrete briquettes on the ground of a construction site; digging a groove to form a foundation trench; installing a foundation trench supporting structure; sequentially placing a plurality of prefabricated bottom concrete cushion blocks, one or a plurality of pipes and a plurality of top concrete briquettes in the foundation trench, enabling both ends of each pipe to be respectively supported in a semicircular groove of one bottom concrete cushion block and be respectively compressed in a semicircular groove of one top concrete briquette, and placing a polyethylene telescopic seam plate between each two sets of bottom concrete cushion block and top concrete briquette combination structures; pouring pipe encased concrete in the foundation trench; and refilling the groove. According to the construction method, the process is simplified, the construction period is shortened, and construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of sewage pipeline construction, in particular to a construction method for laying municipal sewage pipelines. Background technique [0002] At present, municipal sewage pipelines are generally laid in continuous construction in sections, and each section adopts the following construction process: [0003] S1. Digging a trench to form a foundation trench; [0004] S2. Install the support structure of the foundation trench, which is usually supported by a steel box. The purpose is: on the one hand, to ensure the safety of the foundation trench, and on the other hand, to improve the safety of the construction personnel's subsequent operations in the pit; [0005] S3. Pour pipe bottom concrete to the bottom of the foundation trench, set a polyethylene expansion joint plate every 6 meters, the polyethylene expansion joint plate is fixed by a special structure, and manually level the poured pipe bottom concrete;...

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned construction process, when performing manual trimming in the third step, fixing the sewage pipe in the fourth step, and straightening the pipe in the fifth step, construction personnel are required to enter the trench. The construction personnel spend a long time in the trench. On the one hand, it leads to a longer construction period. On the other hand, the operation is dangerous and there are many safety hazards. For example, when the formwork is not supported on both sides of the trench or the support is not When in place, there is a hidden danger of trench collapse

In addition, two concrete pours are required, and the curing time of the concrete at the bottom of the pipe must be reserved in the middle, which will result in longer construction time and low construction efficiency

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