Photovoltaic phc pipe pile connection bracket welding

Is a PHC pile foundation a reliable support structure for heliostats?

A comprehensive design program is proposed based on field tests and numerical simulations, considering deformation and bearing capacity. The study confirms the reliability of the PHC pile foundation as a support structure for heliostats, aiming to offer valuable insights for practical applications.

How are PHC piles connected?

Piles are connected by welding the steel joint plates together to the required total length. PHC piles are historically known as Daido piles in Hong Kong although the name may be technically incorrect.

Can gas arc welding be used for PHC piles?

For PHC piles, as no tension is generated in the pile during jacking, gas arc welding can be used to connect sections of pile, resulting in a significant reduction in construction time and potential damage to the pile. Many construction problems associated with percussion of PHC piles are also eliminated.

What is a PHC pile?

PHC piles are historically known as Daido piles in Hong Kong although the name may be technically incorrect. The original Daido piles were made in Japan where they are installed as replacement piles, as they are inserted into prebored holes followed by grouting of the annular void space between the pile and the prebored hole.

Is the PHC pile still elastic under cyclic loads?

Clearly, under cyclic loads of 6 kN·m and 12 kN·m, it could be considered that the PHC pile was still in the elastic stage. This indicated that the loading and unloading stiffness of the foundation structure was not degraded by repeated action under normal operating conditions.

How is a PHC pile spliced?

The pile is technically a non-displacement pile. PHC piles are mechanically spliced by screws. The required tightening torque exerted on the screws is measured by a torque meter. The screw tightening sequence is also clearly indicated as shown in Figure 3 and it is strictly followed on site.