湛江港大直径钢管桩的压桩试验及其数值模拟

为研究大直径钢管桩压桩试验的数值模拟技术及其与试验结果的差值,以湛江港高桩码头结构为工程背景,对两个码头的3根大直径钢管桩进行了现场试验和数字模拟分析。首先采用锚桩法进行了现场压桩试验,得到了各条试验桩的Q-s曲线和极限承载力;然后采用ABAQUS进行了数值模拟,并将数值模拟结果与试验结果进行了对比分析。分析结果表明,在整个加载过程中,数值模拟的桩基沉降比现场实测结果大,且随着荷载的增加,两者的差值逐渐增大,沉降量的最终差值在20%~30%。

Research on pressed pile test and numerical simulation of large diameter steel pipe pile in Zhanjiang port

In order to study numerical simulation techniques of pressed pile test and the difference of numerical simulation and field test, based on high-piled wharfs of Zhanjiang port, pressed pile test and numerical simulation of three large diameter steel pipe piles of the two wharfs in this paper. Anchored pile method is used in pressed pile test, and the curves of Q-s and ultimate bearing capacity are attained. Then the three piles are numerically simulated by ABAQUS, and results of numerical simulation and filed test are comparative analyzed. The results show that sedimentation value of numerical simulation is bigger than that of field test in the loading process,the difference value increasing with the increasing of load, and the ultimate difference value of sedimentation is about 20% to 30%.