重庆地区基于基桩自平衡法的桩端阻力和桩周侧阻力测试探究

Testing of pile tip resistance and pile side resistance based on self-balanced method in Chongqing

基桩竖向承载力设计过程中桩端阻力和桩周侧阻力往往是依据经验值进行计算,但经验值考虑较为保守。基桩自平衡法在工程实践中已得到广泛应用,重庆市地方标准提出可采用该方法对桩端阻力和桩周侧阻力进行测试,但并未提出具体的试验要点。本文对采用自平衡法测试桩端阻力和桩周侧阻力的可行性进行了论证,并将其应用于实际工程项目,结合现有规范、基桩理论基础及工程经验提出了试验要点及注意事项,供本行业技术人员参考与研究。

In the conventional design of vertical bearing capacity of foundation pile,the pile tip resistance and the pile side resistance are calculated based on the empirical value,and considered conservatively.The self-balanced method of foundation pile has been widely used in engineering practice,and Chongqing local standard proposes that this method can be used to test pile tip resistance and pile side resistance,but no specific test points are proposed.The feasibility of testing pile tip resistance and pile side resistance by using self-balanced method is demonstrated and the method was applied to real engineering projects.Combined with the existing norms,foundation pile theoretical basis and engineering practice,the test points and matters needing attention are put forward as the reference and study for technical personnel in engineering practice.