预测单桩极限承载力的初步实践

The primary practice of prediction for ultimate bearing capacity of single pile

单桩极限承载力值是桩基设计中的重要依据。介绍了利用双曲线法对某工程进行实际单桩极限承载力预测的情况。就某工程静载荷试验结果 ,采用双曲线法对Q S曲线进行拟合 ,对未加载至破坏的试桩预测其极限承载力值 ,并与原检测结果进行分析比较 ,探讨了其适应范围和预测精度等问题 ,以使预测更具科学性和实用性。

The ultimate bearing capacity of single pile is an important foundation for pile foundation design. In the paper the prediction situation for ultimate bearing capacity of single pile using hyperbolas method is introduced. And for static load testing result the fitting method is adopted using hyperbolas method to fit Q S curve and the ultimate bearing capacity is predicted for the test pile when the load was not reach the damage value. This result is analyzed and compared with test result. The applicability and prediction precision are discussed to make the prediction more scientific and practical.