试桩未达极限状态时桩的极限承载力预测

Prediction of Ultimate Bearing Capacity of Non-destructive Test Piles

试桩未加载到破坏荷载时 ,根据已有试桩实测荷载沉降数据 ,用P -S曲线延伸法与双曲线法可预测出桩的极限荷载。尤其是P -S曲线延伸法适应性较好。只要结合桩的P -S曲线形态统一考虑 ,必要时进行综合判定 ,预测结果是可靠有效的。

When the fracture load was not reached for a trial pile, the ultimate load of the pile might be predicted according to the field-surveyed load settlement data of existing trial piles and by P-S curve extension method and hyperbola method, among which, the P-S curve extension method had better adaptability. Provided united consideration in combination with the P-S curve of a pile and necessary comprehensive judgement were conducted, the prediction result would be reliable and effective. That would be of great significance for economical, rational and safe application of pile foundation.