Prestress pipe anti-blocking method
A technology for prestressed pipes and pipes, applied in the field of anti-blocking of prestressed pipes, which can solve the problems that bellows anti-blocking can not play a good role, polyethylene pipes are expensive, and difficult to operate, so as to achieve easy operation and convenient construction , the effect of simple operation
Active Publication Date: 2009-05-20
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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Problems solved by technology
[0002] In the post-tensioning prestressed construction, the anti-blocking of corrugated pipes (here mainly refers to corrugated pipes without steel strands when pouring concrete) mainly uses polyethylene pipes as their inner support pipes. The strength of polyethylene pipes is relatively high. The corrugated pipe can play a very good internal support role to prevent the corrugated pipe from being damaged and infiltrated into the concrete during the concrete pouring process, but the polyethylene pipe is expensive, and because of its high strength, it is not easy to bend. It is difficult to operate the corrugated pipe through the polyethylene pipe
When the number of corrugated pipes is large and the pipes are long, it is not practical to use polyethylene pipes as inner support pipes in prestressed construction, and it cannot play a good role in the anti-blocking of corrugated pipes
Method used
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Embodiment Construction
[0016] The invention adopts the common rubber water bag as the anti-blocking material of the prestressed pipeline to protect the prestressed pipeline. The rubber water bag is installed before the prestressed pipeline layout is completed and the concrete is poured. The specific anti-blocking method process is as follows:
[0017] 1. After the prestressed pipeline is installed, use a single steel strand as the lead wire to run through the pipeline;
[0018] 2. Pull the water bag with the lead wire until the water bag penetrates the prestressed pipeline, such as figure 1 shown;
[0019] 3. Valves are installed at both ends of the water bag, and high-pressure water is added to the water bag;
[0020] 4. After the high-pressure water is filled, close the valves at both ends of the water bag to ensure that there is sufficient water pressure in the water bag, generally 0.06-0.08MPa; in order to keep the water pressure in the water bag lasting, the port valves at both ends of the wa...
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The invention discloses a prestressed pipeline anti-blocking method, which comprises the following steps: the first step, a single steel twisted wire is adopted as a lead wire to penetrate the pipeline after the prestressed pipeline is mounted; the second step, the lead wire leads a water bas to a water bag penetrating prestressed pipeline; the third step, the two ends of the water bag are mounted with valves, and the water bag is filled with high pressure water; the fourth step, the valves at the two ends of the water bag are closed after the high pressure water is full; and the fifth step, concrete is poured, and the water in the water bag is pumped out after the concrete is poured and solidified, then the water bag is pulled out, and the prestressed pipeline is cleared to guarantee the pipeline unblocked. The method has good anti-blocking function and effect to long distance prestressed pipeline, low cost, and convenient construction.
Description
technical field [0001] The invention relates to the field of building construction, in particular to an anti-blocking method for prestressed pipelines. Background technique [0002] In the post-tensioning prestressed construction, the anti-blocking of corrugated pipes (here mainly refers to corrugated pipes without steel strands when pouring concrete) mainly uses polyethylene pipes as their inner support pipes. The strength of polyethylene pipes is relatively high. The corrugated pipe can play a very good internal support role to prevent the corrugated pipe from being damaged and infiltrated into the concrete during the concrete pouring process, but the polyethylene pipe is expensive, and because of its high strength, it is not easy to bend. The operation of corrugated pipe running through polyethylene pipe is more difficult. When the number of corrugated pipes is large and the pipes are long, it is not practical to use polyethylene pipes as inner support pipes in prestress...
Claims
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Inventor 马斌万宗江卿三惠谢卜均张明书
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD