Out-body inner-tube prestressing force hauling multilayer cantilever beam plate structure and construction method
A construction method and prestressing technology, applied in special structures, building components, building structures, etc., can solve problems such as no technical regulations, no technical data to refer to, and difficult construction techniques.
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[0112] In order to further describe the characteristics and advantages of the present invention, the following in conjunction with examples:
[0113] Material
[0114] Unbonded prestressed steel strands: Unbonded steel strands are made of steel strands in accordance with the requirements of the technical standard "Unbonded Steel Strand Prestressed Tendons". Visually inspect the thickness of the non-adhesive plastic wrapping layer (high-density polyethylene), the fullness and uniformity of oiling, etc.
[0115] Prestressed anchorage: the anchorage adopts clip anchors, and the anchorage shall have the manufacturer's certificate of qualification when it enters the site. Its performance should comply with the relevant provisions of the current national standard "Anchors, Clamps and Connectors for Prestressed Tendons" GB / T 14370. Hardness inspection should meet the requirements, anchoring efficiency coefficient: η a ≥0.95, total strain at ultimate tension: ε apu. ≥2.0%, it can ...
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