Application of double prestressed high-strength concrete pipe piles in excavation engineering

The prestressed high-strength concrete pipe piles (PHC piles) are commonly used in the pile foundation engineering. In recent years, because of quick construction and low cost, the PHC piles gradually applied to the excavation engineering. The double-row piles are a space truss structure with large and satisfactory rigidity ability to control the deformation and no internal support is needed. It is convenient for excavation, and have commonly used piles are cast-in-place concrete piles. The double-row PHC piles are a new bracing structure and have the advantages of double piles and PHC piles. The application of the new supporting structure in excavation engineering is introduced combined with an excavation example of Liyang Cultural park and Digital Square.