centrifugally spun concrete pipe system
This technique adopt wet concrete, the pipe body structure has various layers when formed,thus it influence the concrete load resistance. Concrete is usually C30 ,can also do C40. But the pipe nozzle rigidity is lower than the body, not good to be a jacking pipe. During the forming process, concrete pipe mould spun quickly on the centrifugal machine,so does the steel wire cage. These tmay lead to two situation of short life span of the concrete pipe.
1.Steel wire cage has unfasten welding point, result in the steel wire shift or missing,make the pipe locally without steel wire.
2.Wire cage is hardly set in the middle ,Reinforcing mesh is eccentric,namely wire cage protection layer is not even. What’s more, this technique requires large quantity mould to ganrantee the the production, with the mould size deviation and frequent de-molding operation, steel moulds transformation easily occur. Thus lead to Pipe roundness, the perpendicularity of the nozzle, the size of the pipe diameter size and length,which has a bad influence to project quality. The pipeline leakage will cause surface subsidence, can pollute on either side of the soil and groundwater.
roller suspension concrete pipe system
Adopt harsh concrete, pipe structure is even, has great load resistance capacity. We adopt c30 and c40 concrete as raw material. Lower noise than centrifugal technique when pipe forming, clean environment than centrifugal technique. The short coming is, it requires more higher wall
thickness when produce small nozzle pipe to reach the anti-leakage requirement.
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