岩溶区某桩基工程自平衡法检测与分析

Self-balance test and analysis of a pile foundation project in a karst area

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。

The self-balance method has some applications in the test of large tonnage pile, which has certain advancement compared with the traditional method of static load test. Based on a practical example of a pile foundation project in karts area, the foundation in karst area was discussed and analyzed in depth in terms of reasonable selection of foundation form, selection of pile end bearing layer and the applicability of self-balance method for testing of pile foundation bearing capacity etc. The results show that, due to the karst complexity, the pile end bearing layer shall be selected for the pile foundation in karst area according to one-pile multi-test results, and the serf-balance method shall be adopted cautiously for testing of bearing capacity.