岩土力学2017，Vol.38Issue(2)：361-367,7.DOI:10.16285/j.rsm.2017.02.008
桩侧截面形式对扩底桩竖向抗压特性影响分析
Impact of pile shaft shapes on vertical bearing capacity of belled piles
摘要
Abstract
Belled wedge piles with enlarged wedge base through grouting or ramming present high material usage ratio,and benefit the side friction and tip resistance comparing to those of traditional equal section piles.However,few studies focused on quantitative analysis of improvement ratio of vertical bearing capacity of the new type pile.The vertical bearing capacities of belled wedge piles,the load-settlement curve,the distributions of side friction and tip resistance,and load share ratio were measured in sandy and clayey soils.The vertical beating capacities of traditional belled pile with the same concrete volume were compared as control.The results show that the ultimate bearing capacity of belled wedge pile is nearly 1.25 times that of traditional belled pile embedded in sand.The ultimate bearing capacities of belled wedge pile and traditional belled pile increase 11.1％ and 66.7％ when they are embedded in clay than in sand,respectively.关键词
桩基/压缩/极限承载力/扩底楔形桩/模型试验Key words
pile foundation/compression/ultimate bearing capacity/belled wedge pile/model test分类
建筑与水利引用本文复制引用
孔纲强,顾红伟,车平,任连伟,彭怀风..桩侧截面形式对扩底桩竖向抗压特性影响分析[J].岩土力学,2017,38(2):361-367,7.基金项目
国家自然科学基金(No.51278170,No.51306080) （No.51278170,No.51306080）
江苏省自然科学基金项目(No.BK2012478).This work was supported by the National Natural Science Foundation of China (51278170,51306080) and the Natural Science Foundation of Jiangsu Province (BK2012478). （No.BK2012478）
