Application of precast concrete pipe piles in a deep excavation project

As a new type of retaining pile for foundation pit engineering, the pre-tensioned prestressed concrete pipe pile has many advantages, such as a good pile quality, high strength and reliable construction quality. It is worthy of popularization and application. Based on the displacement calculation method, the parameters that affect the displacement of excavation are further analyzed when the prestressed concrete pipe pile is used as the retaining pile. Through a practical example of research building of NUPT, the layout of retaining piles is introduced, and the measured displacement of the foundation pit is compared with the theoretical results. It is shown that the calculated displacement changes gently, and the maximum varies from 17.0 mm to 23.2 mm; while the measured values are between 16.1mm and 21.5mm. They are consistent with each other, and the change rule is almost identical. Thus the reliability and validity of the prestressed concrete retaining pipe pile are conformed. It may provide a good reference for similar projects..