大吨位基桩动静对比试验研究

Comparative Study on the Large Tonnage Pile between High Strain and Static Load

针对大吨位灌注桩开展动静对比研究,指出高应变法在大吨位灌注桩领域应用较少原因,结合实际工程进行动静对比,结果显示检测桩高应变拟合分析和静载检测结果吻合性较好,证明拟合分析采用的桩土模型、参数是合理的。针对有些地方动静对比的误区,指出无须刻意追求检测值的差异,只要选用的桩土模型、参数合理,二者差值不大即可。对于高应变检测中存在疑问的桩应采取其它方法进行验证,各种基桩检测方法取长补短,共同发展。

Aiming at large tonnage piles to carry out static and dynamic,comparative study pointed out that high strain in large tonnage pile field less application reasons,combined with the actual project,the static and dynamic results were compared. The result showed that the testing pile high strain fitting analysis and the static load test result was in good agreement. The quasi synthetic analysis of the pile soil model,the parameters were reasonable. In view of the misunderstanding of the domestic some places,it was pointed out that there was no need to deliberately pursue the detection value of the difference,as long as the selection of pile soil model,reasonable parameters,difference between the two was not obvious. For the existing questions of the pile other methods should be adopted to verify,all kinds of pile testing methods to complement each other and common development of high strain dynamic testing.