中国石油大学学报（自然科学版）2016，Vol.40Issue(2)：115-122,8.DOI:10.3969/j.issn.1673-5005.2016.02.014
一大直径管桩沉桩过程中溜桩判断方法研究
Research on prediction of pile running during large diameter pipe piles driving
摘要
Abstract
In ocean engineering, pile running often occurs during the driving process of large diameter pipe piles. Unpredict-ed pile running will cause severe consiquences, so an accurate prediction is necessary. The generating and stopping mecha-nisms of pile running in practical engineering were analyzed. The computing method of dynamic resistance was proposed by researching the strength reduction of soil and the excess pore pressure around the pile. Using the principle of work and pow-er, the transformation of energy was analyzed during pile driving, and the corresponding equations were derived. Combining with the computing method of dynamic resistance, the prediction for the process of pile running was realized. It turns out that the pile running will stop when the pile tip goes into a thick layer of sand or the skin friction reaches a certain high value. If the later situation occurs, the pile running won't happen again. When calculating the skin friction, the effects of pore expan-sion and cyclic loading must be considered. The calculated results agree well with the measured ones.关键词
溜桩/动侧摩阻/强度折减/孔压/重塑强度Key words
pile running/dynamic skin friction/reduction of strength/pore pressure/remolding strength分类
建筑与水利引用本文复制引用
孙立强,贾天强,闫澍旺,贾沼霖..一大直径管桩沉桩过程中溜桩判断方法研究[J].中国石油大学学报（自然科学版）,2016,40(2):115-122,8.基金项目
国家自然科学基金项目(41402263) （41402263）
天津市自然科学基金重点项目(13JCZDJC35300) （13JCZDJC35300）
