岩土工程学报2011，Vol.33Issue(9)：1391-1398,8.
螺旋挤土桩下旋成孔过程的颗粒流数值模拟
PFC numerical simulation of augered piling of soil displacement screw piles
摘要
Abstract
The soil displacement screw piles have been extensively used in the international foundation field.In order to study their mechanical behaviors of augered piling,the discrete element simulations are conducted.The micro-simulation parameters are gained to simulate the behaviors of Fujian standard sand under direct shear condition.Based on the parameters,a ground model is formed in PFC3D.A comparison between numerical and experimental results shows reasonable agreement.The mechanism of drilling with different penetration rates of auger in different depth soil layers are studied by considering displacement development,stress distribution and the auger resistance development.The numerical results show that the mechanism of borehole depends on penetration rate of auger.Lower penetration rate reduces the disturbed range of the soil around the borehole and vertical resistance of auger.The displacement mode of the soil varies at different depths.关键词
螺旋挤土桩/下旋成孔/颗粒流模拟/掘进旋转速度比Key words
soil displacement screw pile/augered piling/PFC numerical simulation/penetration rate分类
建筑与水利引用本文复制引用
邓益兵,周健,刘文白,刘钟,李志毅..螺旋挤土桩下旋成孔过程的颗粒流数值模拟[J].岩土工程学报,2011,33(9):1391-1398,8.基金项目
国家自然科学基金项目 （）
上海高校选拔培养优秀青年教师专项基金项目 （）
上海海事大学校基金项目 （）
上海海事大学重点学科建设项目 （）
