The length of the pile extension, refers to as a result of a pile can not meet the design depth, so you need to connect precast pile one continued to play down, until into the design depth. The process of connecting the top of the first pile to the bottom of the post. Welding method, flange bolt connection and sulphur cement anchor connection. Flange bolt connection method is to make two piles, fixed on a flange, a first between the two flanges, plus the flange gasket, bolt fastening together, complete the connection.
Using flange grafting should meet the following rules 1, flange joint, can add the material such as the asphalt paper, such as flanged to have the place of not close, apply thin steel piece to tighten. The flange bolts shall be tightened one by one, and the spring washer or welding shall be added to prevent the bolt from being loose when the hammer is struck. The connection of the pile shall be carried out in accordance with the design requirements or relevant regulations.
Flange grafting is the name of the flange. Pile extension of the reason is mainly due to need high long pile in construction, but the actual production limited length, when the pile length must take long to meet the requirements, so can be used in the construction of a method for the flange joint. Flange joint pile - is set on two root pile flange, flange is processing is pre-installed in pile foundation, made contact directly on the right It is ok to tighten
