Pile Friction Freeze Effects - A Lab Prediction Study & Field Demo

“冻结”是一种位移桩/土相互作用，随着时间的推移而发生，通常会导致桩容量的大幅增加。这种能力的提高在很大程度上是由于侧摩擦的增加，这是实践工程师所熟知的，但却知之甚少，因此没有得到充分利用。本研究将利用离心机模拟的时间加速优势，研究侧面摩擦冻结过程中孔隙压力和老化现象。在离心机中进行模型原位试验和在原位进行全尺寸试验，以评估它们作为桩冻结预测试验的潜力。

"Freeze" is a displacement pile/soil interaction that happens over time and often results in a major increase in pile capacity. This improvement in capacity, which for the most part is due to side friction increase, is well known to practicing engineers, but poorly understood and therefore underutilized. The proposed research will study the pore pressure and aging phenomena involved with side friction freeze using the time-accelerating advantages of centrifuge modeling. Model insitu testing in the centrifuge and full scale tests insitu will be used to evaluate their potential as predictor tests for pile freeze.