基桩浅部缺陷位置及程度的振动理论分析方法  

AN ANALYSIS METHOD FOR THE LOCATION AND DEGREE OF SHALLOW DEFECTS OF PILES

作　　者：赵海生[1] 

机构地区：[1]西安理工大学

出　　处：《土木工程学报》2005年第6期83-88,共6页China Civil Engineering Journal

摘　　要：浅部缺陷桩特别是浅部严重缺陷桩在低应变测试时主要表现为振动而非通常情况下所分析的波动,致使通常的评判缺陷深度及程度的准则不再适用。本文采用振动理论,将浅部缺陷以上桩段假设为刚体,缺陷处的桩身假设为弹簧,通过对浅部缺陷桩的纵向振动分析,提出了一种利用频谱分析技术分析浅部缺陷位置和程度的方法,检测实例验证了该方法的正确性。The formsoft motion of piles with shallow defects,especially serious defects,are more of vibration than waves in Low Strain Testing,the normal test criterion on the location and degree of defect is inappropriate.Based on vertical vibration theory,assuming the segment above the defect is a rigid body,and the segment with the defect is a linear spring,an analysis method for the location and level of shallow defect is given.The proposed method is verified by practical applications.

关 键 词：浅部缺陷 缺陷位置 缺陷程度 刚体 纵向振动 刚度 

分 类 号：TU473.1[建筑科学—结构工程]