摘要
基于７２个工地１８６根静载试桩的统计资料，分析了桩端、桩侧压浆对钻孔灌注桩的增强加固机理，深入研究了后压浆钻孔灌注桩单桩竖向承载力特性。利用静载试桩结果，统计出后压浆桩极限承载力增幅值及极限端阻力增强系数的频数分布规律，提出了后压浆桩单桩极限承载力的实用计算公式。
Based on the statistical data from the static load tests for 186 piles in 72 construction sites, the reinforcement mechanism of bored piles by postgrouting at pile end and pile lateral is analyzed, and the characteristics of vertical bearing capacity of postgrouting bored pile are studied. By using the static load testing results, the frequency distribution curves of the increased value of limiting bearing capacity and the strengthening parameters of the limiting end resistance of piles are obtained. At last, a practical formula is proposed to calculate the vertical limiting bearing capacity of this kind of piles.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2001年第4期546-550,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
湖北省建设科技攻关(G200013
G9907)资助项目。
关键词
钻孔灌注桩
后压浆
竖后承载力
统计分析
Bearing capacity
Grouting
Reinforcement
Statistical methods
Structural loads
