人工挖孔灌注桩桩端土(岩)承载力静力测试方法探讨

Research on the Method of Static Test for the Bearing Capacity of Soil (Rock) under the Pouring Stake of Mandigging Hole

研究了人工挖孔灌注桩（扩底桩）桩端土（岩）承载力静力测试方法，以扩大头锥形壳体以上的土（岩）自重代替以往静力试验的堆载或锚桩反力，于孔底直接进行小压板静力试验，直接测定桩端土（岩）承载力．并结合实例介绍了在工程中的应用．

This articie has made a research on the method of static test for the bearing capacity of soil (rock) under the pouring stake (or bottomexpanding stake) of mandigging hole. This method lies in taking use of the soil′s (rock′s) deadweight over the expanding head of the cone in stead of using the loading method or reacting force of anchor stake as people used to do in static tests. It can directly make the experiment on static test of the littlepressure board and test the bearing capacity of the soil (rock) under the pouring stake. Dimultaeously this article has introduced its application in some projects with exampies.