5.1 Background

It applies to PV projects with long underground piles in softsoil conditions, where deep embedment is required, and piledesign scenarios demanding optimized pile length and controlled project cost.

5.2 Solution: External Texturing for Long Underground Piles

External frictionenhancing textures are added on the outer surface of long underground piles to increase pilesoil friction, reducing the required pile length. This serves as a supplementary optimization measure for longpile design.

5.3 Core Advantages

1.Effectively mobilizes pilesoil friction, enabling reduced the required pile length under equivalent bearing capacity conditions.

2.Minimizes steel consumption and lowers material cost per pile.

3.Acts as an alternative optimization solution for long piles, compatible with a wide range of soil conditions.