External prestressing using prestressed pipe pressure slurry what are stated in the standard

Prestressed pipe pressure slurry prestressed pipe pulp price appropriate chooses of externally prestressed tendons prestressed pipe pressure slurry manufacturer of high strength low relaxation prestressed steel wire, its quality should be consistent with existing national standards of prestressed concrete and steel lines ( CB／T5224） The provisions of the. In vitro east of the outer casing can choose high density polyethylene pipe or galvanized steel pipe. Outer casing and coupling should be completely sealed waterproof, in use should be reliable durability; Outer casing should be prestressed and prestressed pipe pressure slurry and anti-corrosion material has good compatibility, and should be able to resist in the process of transportation, installation and use of all kinds of forces and not damaged. The durable performance of anti-corrosion material shall be the beam in vitro environment categories and use fixed number of year; Prestressed pipe pressure slurry anti-corrosion materials in processing, transportation, installation and tensioning process should be able to maintain its stability, flexible and no cracks, flow and temperature range is not required. Wrong solid system should match the east body form and composition. The installation of the outer casing connection should be smooth and shall be completely sealed, during the installation process should prevent outside casing by mechanical damage. By multiple root of prestressed tendons of externally prestressed beam outer casing, anticorrosive grease should be adopted to protect the tube. East fault zone and fixation deviators should simultaneously with the main structure construction, embedded firmware and pipe location and the direction should comply with the design requirements. 2 °, installation error should be not more than plus or minus 5%, otherwise should be adjustable steering blocks. Externally prestressed beam should be perpendicular to the bearing plate, the end of the starting point of curve segment to tensioned anchorage point of the straight line length should not be less than 600 mm. Protection measures should be taken in beam, it is strictly prohibited to drag and drop on the surface of the concrete of the prestressed steel, to prevent damage to the protective layer and abate the anti-corrosion ability.