自平衡法在大吨位桩基检测中得到了一定的应用,同传统的静载试验方法相比,自平衡法具有一定的先进性。基于岩溶区某桩基工程实例,对岩溶区基础的合理选型、桩端持力层选择、自平衡法检测桩基承载力的适用性等方面进行了深入的分析和探讨。结果表明:由于岩溶的复杂性,对于岩溶区的桩基应根据一桩多探结果选择桩端持力层,承载力检测应慎重采用自平衡法。 Self-balancing method in large tonnage pile foundation detection has been a certain application, compared with the traditional static load test method, self-balancing method has some advanced. Based on the engineering example of a pile foundation in karst area, the reasonable selection of foundation of karst area, the selection of bearing layer of pile end, the applicability of self-balance method to test the bearing capacity of pile foundation are analyzed and discussed in depth. The results show that due to the complexity of karst, the self-balance method should be used with caution in bearing capacity test.