挤扩多盘桩抗拔承载力计算模式研究  

RESEARCH ON CALCULATION MODEL ABOUT PULLOUT RESISTANCE CAPACITY OF PUSH-EXTEND MULTI-UNDER-REAMED PILE

作　　者：钱永梅[1] 任佳佳[1] 牟楠[1] 

机构地区：[1]吉林建筑大学,长春130118

出　　处：《建筑技术》2015年第6期502-504,共3页Architecture Technology

基　　金：国家自然科学基金项目资助(51278224)

摘　　要：结合软件模拟分析和试验现象的分析成果,确定挤扩多盘桩在竖向拉力作用下,桩周及盘上、下土体的破坏状态,根据冲切理论和滑移理论对挤扩多盘桩竖向抗拔承载力的计算模式进行分析,分别推算出当土体冲切破坏及滑移破坏时的计算模式,可为挤扩多盘桩抗拔承载力研究提供理论支持。Based on the result of software simulation analysis and experimental phenomenon, it is determined failure state of soil around pile , at top and bottom of bearing multi-under-reamed of the push-extend multi-under-reamed pile under vertical tension, according to the punching theory and slip theory, they are analyzed that calculating mode about pullout resistance capacity of the push-extend multi-under-reamed pile, the calculation mode are respectively calculated as soil in the state of shear failure and sliding failure. All of above provide theoretical support for research of pullout resistance capacity of the push-extend multi-under-reamed pile under.

关 键 词：挤扩多盘桩 抗拔承载力 冲切破坏 滑移破坏 

分 类 号：TU473[建筑科学—结构工程]