Piling pipe mainly refers to industrial spiral seam steel pipe or prestressed concrete pipe pile. During production, Q235B, Q345B, 20# steel and other materials are mostly selected, and they are made through curling and welding processes. In order to be applicable to more fields, there are multiple outer diameter ranges during production, from φ219–φ3500mm, wall thickness can reach 6–100mm, and length is 8-12 meters. Different types of steel pipes are used in different fields, such as spiral seam steel pipes for oil and gas transportation, water conservancy projects, and urban infrastructure, and prestressed concrete pipe piles are used for soft soil, clay soil or hard sandwich foundations.
When pile pipes are used in different fields, different construction methods and processes are used:
Hammering method: If it is a hard interlayer, hammering method can be selected, but the noise is relatively large, and pile position layout, vertical calibration, and pile welding are required during construction;
Static pressure method: Suitable for soft soil and densely populated areas, using hydraulic pile driver, the soil disturbance can be reduced through pressure control;
Innovative technology: offshore construction uses a pile stabilization platform, and the verticality deviation is ensured to be <0.3% through pile grippers and jacks, which is suitable for water depths of 10-45 meters.
Since piling pipes have so many application fields and construction processes, what are the advantages in the process of use?
Soft soil foundation treatment: In the expansion of highways, prestressed pipe piles are combined with crushed stone cushions to significantly improve bearing capacity and reduce settlement. Even if used for a long time, there will be no danger;
Offshore engineering: Wind power projects use stable pile platforms to achieve high-precision pile sinking. Think about the dangerous offshore operations seen on TV, so when using them in offshore projects, you must choose high-quality piling pipes;
During use, we can find that the construction speed is particularly fast, and more than 20 piles can be driven per day. The quality of the piles is reliable, especially suitable for scenes with high seismic requirements.
