地震工程学报Issue(3)：462-467,6.DOI:10.3969/j.issn.1000-0844.2014.03.0462
海洋平台打桩过程中溜桩对桩基影响的研究
Influence of Pile Sinking on Pile Capacity during Pile Driving on Offshore Platforms
摘要
Abstract
Pile sinking during pile driving is common.A sudden drop of a pile after a strike from the hammer may cause a serious accident,such as the pile falling out of the drive cap or damage to the pile from high tension stress.Pile sinking also often causes a large deviation between the drivabili-ty prediction and the measured blow count.Therefore,an accurate assessment of pile capacity af-ter pile sinking becomes an important problem to address in practice.In this paper,two projects in the East China Sea are chosen to analyze.Based on the results of dynamic load tests in the field and pile driving records,the influence of pile sinking on pile capacity at the end of driving (EOD) is studied.The analysis results show that pile sinking will lead to a significant decrease in the total energy used in pile driving.The results from CAPWAP show that the unit friction of a soil layer where piles run off is close to zero,while the pile end resistance shows no obvious abnormalities. This indicates that the decrease in pile capacity caused by pile sinking is mainly from friction re-duction.In this instance,the pile capacity reduction resulting from pile sinking can reach a maxi-mum of 17% of the designed value.关键词
溜桩/打桩记录/动测/承载力Key words
pile sinking/pile driving records/dynamic load test/pile capacity分类
交通工程引用本文复制引用
李飒,王耀存,蒲玉成,孙振平,樊之夏,韩亮..海洋平台打桩过程中溜桩对桩基影响的研究[J].地震工程学报,2014,(3):462-467,6.基金项目
天津市自然科学基金重点项目(13JCZDJC35300) （13JCZDJC35300）
