后压浆钻孔灌注桩性状的研究  

Study of Characteristics of Bored Cast-in-situ Pile by Post-grouting

作　　者：张志勇[1] 

机构地区：[1]上海隧道工程股份有限公司施工技术研究所

出　　处：《地下工程与隧道》2001年第1期27-32,共6页Underground Engineering and Tunnels

摘　　要：分析了后压浆技术提高钻孔灌注桩承栽力的作用机理及荷载传递性状,提出了桩端及桩侧阻力提高系数的概念,并建议了后压浆钻孔灌注桩的承载力公式,最后结合一工程实例说明后压浆的施工工艺及提高承载力的效果,可供技术探讨。This paper analyses the mechanism of increasing bearing capacity of bored cast-in situ pile by using the post grouting technolgy and the load transfering. The increasing coeffi- cients of bearing capacity of pile side and pile bottom is proposed. Aformula for calculating the bearing capacity of bored cast in-situ pile is also suggested. In the end of this paper, an engineering example is cited to demonstrate the construction procedure and the effect of in- creasing bearing capacity by postgrouting technology.

关 键 词：钻孔灌注桩 后压浆 机理 承载力 荷载传递规律 施工工艺 

分 类 号：TU753.3[建筑科学—建筑技术科学]