地震工程学报2017，Vol.39Issue(1)：20-27,8.DOI:10.3969/j.issn.1000-0844.2017.01.0020
大直径钢管桩土塞效应的拟静力判断方法
Quasi-static Method to Evaluate the Soil Plug Effect on a Large-diameter Steel Pipe Pile
摘要
Abstract
During pile driving,soil plug effect evaluation has an important influence on the predic-tion of pile driving resistance and bearing capacity.The static equilibrium method is usually ap-plied to determine the plugging status of a steel pipe pile with a small diameter.Steel pipe piles that are larger than 2 m have been widely used to increase the operating water depth of offshore platforms and to construct offshore wind projects.The stress and deformation characteristics of soil in pile tube change with the increase of pile diameter.Soil failure mode in the process of driv-ing in sand,with steel pipe piles of different diameter to length ratios is obtained by using numer-ical simulation method.Based on the numerical simulation result,the Meyerhof formula is deter-mined to calculate the soil resistance.To examine the soil plug effect of a large-diameter steel pipe pile,the quasi-static equilibrium method is proposed,in which the influence of the inertia force on soil plug is analyzed.According to the small-scale pile driving model tests with different diam-eter to length ratios and the analysis of practical piling project,the applicability of the quasi-static equilibrium method for a large-diameter steel pipe pile is verified.关键词
大直径/钢管桩/土塞/拟静力平衡法/梅耶霍夫公式Key words
large diameter/steel pipe pile/soil plug/quasi static equilibrium method/Meyerhof分类
建筑与水利引用本文复制引用
刘润,郭绍曾,周龙,闫澍旺..大直径钢管桩土塞效应的拟静力判断方法[J].地震工程学报,2017,39(1):20-27,8.基金项目
国家自然科学基金面上项目(51279127) （51279127）
国家自然基金优秀青年基金项目(51322904) （51322904）
