挤扩多盘桩承力扩大盘间距对单桩承载力影响的理论分析

通过有限元模拟分析方法，分析挤扩多盘桩主桩及盘周围土体的破坏机理，确定了挤扩多盘桩承力扩大盘间距对桩周土体破坏性状的影响，对承力扩大盘间距对挤扩多盘桩单桩承载力的影响进行了定性的分析，并建议了承力扩大盘问距的下限值，为进一步综合考虑挤扩多盘桩单桩承载力计算提供了理论依据。

ANALYSIS ON THE DISTANCE BETWEEN THE BEARING PUSH-EXTEND REAMED AFFECTING THE BEARING CAPABILITY OF PUSH-EXTEND MULTI-UNDER-REAMED PILE

In the paper, through theoretical analysis about the stress of pile placed the bearing push-extend reamed and the failure behavior of the soil surround the pile, it is defined that the influence for bearing capacity of the pile push- extend multi-under-reamed pile, raised by the different distance between the bearing push-extend reamed bearing loads, and it is suggested that the limit value of the distance between the bearing push-extend reamed, the theoretical basis of synthetically researching the bearing capacity of the pile of the push-extend multi-under-reamed pile is put forward.