ANALYSIS AND DISPOSAL OF CONSTRUCTION QUALITY ACCIDENT FOR PRESTRESSED CONCRETE PIPE PILES IN SOFT SOIL AREA

Prestressed pipe pile is widely used in soft soil area due to its fast construction speed and high efficiency． However，the pipe piles are prone to floating，deviation，damage and fracture due to high water content，weak strength，poor stability for soft soil． As foundation excavation is needed for high-rise building with basement， construction accidents are more likely to occur when foundation soils are disturbed or piles are crashed． In light of project cases in typical soft soil of Huzhou Region，the paper showed conventional construction process of the pipe piles for high-rise building with basement and common pipe pile quality construction accidents，also analyzed the causes of the accident，and introduced treatment methods for the accident． Later detection and settlement observation indicated that the treated pile could meet the design requirements，and the building settlement was minor and even．