越南大翁桥桩基承载性能试验研究

Experimental research on bearing behavior of piles with self-balanced method in Daweng bridge in Vietnam

越南某开发区大瓮桥、芹玉桥4根试桩均为钻孔灌注桩(其中两根试桩采用了桩端后压浆技术),用自平衡法进行了静载试验。简要介绍了测试方法的基本原理和桩端后压浆技术,并对试验数据进行了分析。试验结果表明,越南规范高估了桩端承载力,桩端后压浆可以大幅度提高承载力。

Four test bored piles in Daweng bridge & Qinyu bridge projects in Vietnam have been tested with self-balanced method of bearing capacity.The pile tip post-grouting technology was used in two of them.The fundamental principles of this method and the pile tip post-grouting technology are introduced.The experimental data gained are analyzed.The results indicate that the design codes of Vietnam over estimate the tip bearing capacity;and the pile tip post-grouting can boost the bearing capacity of piles.