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

桩摩擦冻结效应 - 实验室预测研究

• 批准号: 9205247
• 负责人: Michael McVay
• 金额: $ 27.28万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-10-15 至 1998-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9205247&HistoricalAwards=false
• 关键词: Pile; Friction; Freeze; Effects; Lab

"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.

“冻结”是一种位移桩/土相互作用，随着时间的推移而发生，通常会导致桩承载力的显著增加。这种能力的提高在很大程度上是由于侧摩擦力的增加，这对执业工程师来说是众所周知的，但人们对此知之甚少，因此没有得到充分利用。这项拟议的研究将利用离心机模型的时间加速优势来研究侧摩阻力冻结所涉及的孔压和老化现象。将使用离心机模型现场试验和现场足尺试验来评估它们作为桩冻结预测试验的潜力。