Abstract:
Prestressed high-strength concrete pipe pile is an important pile type in soft soil areas. Some engineering piles were tested dynamic load(high-strain test) and static load(static load test) in Chancheng, Foshan City, and the dynamic and static test results of bearing capacity of PHC pipe piles, the relationship between dynamic and static parameters, and the test error were compared and analyzed. The results show that the relative error of the vertical bearing capacity of the two methods varies from 7. 1% to 25. 2%. The calculation degree of the Capwap method is mainly affected by the pile-soil mechanical model, the pile-soil interaction system, the excitation degree of the rock-soil resistance, and the selection of fitting parameters. Reasonable parameter selection can effectively improve the accuracy of the method. Several kinds of characteristic curves of single pile static load test are obtained, and the empirical formula of elastic modulus and strain was established. The comparison test results can provide a reference for the design of pipe piles and dynamic and static detection of pile foundations in the region.