摘要
后压浆技术可大幅提高钻孔灌注桩的承载力。基于西安至铜川扩建工程试桩的现场静载试验,分析了桩端后压浆的增强加固机理,深入研究了后压浆钻孔灌注桩单桩竖向承载力特性,桩侧阻力及桩端阻力的发挥性状。利用实测结果,得出了后压浆增强系数,并提出了后压浆单桩极限承载力的计算公式,可为相关领域的工程提供一定的借鉴。
Post-grouting technology can significantly improve the bearing capacity of bored piles. Based on the on-site static load test of test pile in Xi'an-Tongchuan expansion project, the reinforcement mechanism of post-grouting technology is analyzed, the vertical bearing capacity characteristics as well as the traits of the later- al friction and tip resistance of post-grouting bored pile are studied in depth. According to the experimental re- suits, the reinforcement coefficient of post grouting is obtained, and the computing formula of ultimate bearing capacity of single pile with post-grouting technology is proposed, which can provide a reference for engineering in relevant field.
出处
《交通标准化》
2012年第2期77-82,共6页
Communications Standardization
关键词
后压浆技术
钻孔灌注桩
侧摩阻力
静载试验
极限承载力
post-grouting technology
bored pile
lateral friction
static load test
ultimate bearing capacity