自平衡法抗拔桩承载能力静载试验及评定分析

Static Load Test and Assessment Analysis of Bearing Capacity of Uplift Piles by Self-Balance Method

自平衡法静载试验作为一种新型的基桩承载力测试方法,与传统静载试验相比具有技术的优越性及经济上的巨大优势,目前在我国已经开始小范围地使用。论文结合某城市地下停车场工程,开展了抗拔桩承载能力静载试验,系统地介绍了其试验检测方法,实测了加卸载过程中抗拔桩荷载变化及其相对应的位移变化量,分析了基桩在实际工作状态及在设计荷载作用下的承载能力。可为同类基桩静载试验提供参考。

As a new type of pile bearing capacity test method, self balance static load test has the advantages of technology and economy compared with the traditional static load test, and has been used in a small range in China. In this paper, the static load test of the bearing capacity of the uplift pile is carried out in combination with the underground parking lot project of a city. The test method is systematically introduced. The load change of the uplift pile and the corresponding displacement change during the loading and unloading process are measured, and the bearing capacity of the foundation pile under the actual working condition and the design load is analyzed. It can provide a reference for the same kind of pile static load test.