(温州市建设工程质量监督站  325013)
［提要］  通过对软土地基超长钻孔灌注桩的静载荷试验和桩身轴力测试结果的分析，研究软土地基超长钻孔灌注桩的承载性状和荷载传递机理。研究表明，超长桩表现为端承摩擦桩，桩的侧摩阻力和端阻力是异步发挥且互相耦合的。同时，超长桩会产生较大的桩土相对位移，出现桩侧摩阻力软化。研究成果对进一步认识软土地基超长钻孔灌注桩的工作特性，指导工程实践具有一定的参考价值。
［关键词］  软土地基  超长钻孔灌注桩  承载性状  荷载传递
Research on Bearing Behavior of Superlong Bored Pile in Soft Clay Ground/Xu Xinyue(The Monitor of Quality of Construction Wenzhou，Wenzhou 325013，China)
Abstract:Based on the static load test and stress measurement of overlength piles in soft soil foundation，the load transfer mechanism and bearing behavior of overlength pils under load have been studied. Under heavy loads, the superlong bored piles behave as endbearing frictional piles, and their frictional resistance and end resistance are asynchronous and coupling. The frictional resistance will be degraded. The results of study can be reference to understand the bearing behavior of the superlong bored pile in soft clay ground.
Keywords:soft clay ground； superlong bored pile； bearing mechanism； load transfer