施工因素对自平衡试桩极限承载力的影响分析

Impact of Construction Factors on the Ultimate Bearing Capacity of Self-Balancing Test Pile

由于自平衡试桩受力机理的特殊性,施工因素对极限承载力的影响是值得探讨的问题。本文结合某桥梁工程,对采用不同施工工艺成孔的两根自平衡试桩的桩身位移、侧摩阻力以及极限承载力测试及转化结果进行了对比分析,就成孔工艺对自平衡试桩上段极限承载力的影响进行了探讨,指出在一定的土层条件下,成孔工艺因素对自平衡桩极限承载力的影响不容忽视。

Because of the special features on loading mechanism of the self-balancing test pile,it is well worth studying the influence of the self-balancing test pile ultimate bearing capacity from the construction factors.This paper compared the testing data and the conversion results of the displacement,lateral friction,resistance and the ultimate bearing capacity between two piles in a large bridge project with different drilling technology.Based on the results,the influence of drilling technology on the ultimate bearing capacity of the up-pile is analyzed.As the result,the paper shows that the influence of drilling technology on the ultimate bearing capacity of the self-balancing test pile cannot be ignored in certain engineering geological conditions.