桩端后压浆对群桩承载特性的影响研究  

Study on Influence of Pile-end Post-grouting Technology on Bearing Characteristics of Pile Groups

作　　者：杨有莲 吴启红 万世明 谢飞鸿 董建辉 YANG Youlian;WU Qihong;WAN Shiming;XIE Feihong;DONG Jianhui(School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China)

机构地区：[1]成都大学建筑与土木工程学院,四川成都610106

出　　处：《成都大学学报（自然科学版）》2017年第4期417-420,共4页Journal of Chengdu University（Natural Science Edition）

摘　　要：阐述了超长大直径灌注桩桩端后压浆技术及其作用机理,介绍了该技术在施工中存在的问题,以供类似工程借鉴和参考.通过某大桥超长大直径灌注桩基础的具体工程应用表明,利用桩端后压注浆可大大提高灌注桩的桩基承载力,为克服灌注桩施工工艺上的局限性提供了一种有效的方法.In this paper, the pile-end post-grouting technology and its mechanism of bored piles of super- long diameters are discussed, and the problems existing in the construction are introduced in order to pro-vide reference for similar projects. Based on the study of a specific engineering application of filling pile foundation of a bridge with a large diameter, this paper shows that the bearing capacity of pile foundation can be greatly improved by using the pile-end post-grouting technology which provides a very effective method to overcome the limitations of the construction technology of filling piles.

关 键 词：超长大直径钻孔灌注桩 桩端压力注浆 作用机理 承载力 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]