Prestressed concrete with steel rods, the implementation of the standard of GB / T 5223.3-2005. Product code for SBPDL 1275/1420. Main specifications have a diameter of 7.1, Phi 9.0mm, Phi 10.7mm, Phi 12.6mm pitch. Package for disc volume. Main features: the yield strength up to 1275 MPa, tensile strength up to 1422 MPa, extending good rate (D8 '5%); surface of cyclical changes in the notch (3 ~ 6 head spiral groove), and the concrete has good bondability and bonding properties and 7 of steel stranded wires with; because of the low carbon steel has good welding performance. The use of steel series cage, can be conveniently used automatic production by mixed concrete pipe welding process. Good upsetting performance and application in construction site, can end upsetting and rolling; as a whole reinforced concrete pre tension, anchorage is very convenient. After the finished rolled up in the elastic range, so the product will automatically roll loose straight, without straightening. After all kinds of strict physical and chemical inspection, the product is the substitute of the thread steel and the building wire.
PHC pile characteristics
(1) in strict accordance with the national standard GB13476 - 92 and Japan JISA 5337 standard production, the concrete strength grade is not lower than C80 grade.
(2) the bearing capacity of single pile is high, and the design scope is wide. In the same building foundation, the use of different diameters of pipe piles, easy to solve the problem, can give full play to the bearing capacity of each pile.
(3) a single school can be connected to an arbitrary length without the limitation of construction machinery and construction conditions.
(4) the quality of the pile is reliable, and the length of the pile and the quality of the pile can be monitored by direct means.
(5) the pile body is resistant to hammering and cracking resistance, penetrating power.
(6) low cost. Its unit bearing capacity of the price of steel 1/3-2/3, and save steel.
(7) construction speed, civilization construction.