采用自平衡试桩法对润扬长江公路大桥特大吨位大直径基桩进行了足尺模型竖向承载力试验 ,同时在同一场地进行了 2根小直径模拟桩试验。将自平衡试桩结果转换成等效传统静载试桩曲线并进行分析研究 ,对模拟试桩效果进行了有意义的探索。介绍了自平衡试桩法的双荷载箱技术在世业洲高架桥大吨位基桩中的应用 The self-balance test method was used to test the vertical bearing capacity of the large-diameter large-diameter pile with large tonnages of Runyang Yangtze River Highway Bridge. Two small diameter pile simulations were conducted at the same site. The results of self-balancing test pile are converted into the equivalent traditional static pile test curve and the analysis is made, and a meaningful exploration is made on the effect of simulated pile test. The Application of Double Load Box Technology of Self-Balance Pile-Test Method in Large-tonnage Pile of Shiyezhou Viaduct