Abstract: Based on statistics of lateral load test data of 56 prestressed high-strength concrete(PHC) pipe piles in Fuzhou area, the horizontal bearing capacity of PHC piles in Fuzhou area is studied by combining m-method recommended by China’s technical code for building pile foundation. The range of m value for different soil around piles in Fuzhou area is confirmed by comparing back analysis value based on lateral load test data of different types of piles with value recommended by the code. The applicability of two kinds of mechanical models recommended by the code are validated by comparing with the bending moment curve simulated by the ABAQUS finite element software. The results show that the m method is applicable in calculating horizontal bearing capacity of single PHC pile in Fuzhou area. Physical and mechanical properties of overlying fill soil have an evident influence on the horizontal bearing capacity of PHC piles in silt. It’s applicable to adopt the "tip of pile supported in the bedrock surface or soil" model recommended by the code’s appendix to calculate horizontal bearing capacity of PHC piles in Fuzhou area.

Key words: prestressed high-strength concrete(PHC) pipe pile, horizontal bearing capacity of single pile, m-method