摘要
采用ABAQUS软件模拟基桩低应变完整性动测过程,分析桩周土对动测曲线的影响,重点研究成层土对桩身内外部缺陷反射波形的影响。结果表明,成层土中土层模量差异是导致动测曲线产生类似桩身缺陷反射波形的主要因素;考虑同一桩身完整性系数且缺陷深度相同的情况,对内外部缩径桩,当桩身外表面缩径处的土体模量和桩身模量较接近时,外部缩径处的反射波形将呈现类似扩径的反射波形;而对离析桩,桩身内外部缺陷位置变化对反射波形影响不大。
The low strain dynamic processing of piles are simulated by means of ABAQUS software,and then the influence of the soil to the dynamic curves are analyzed,focusing on analyzing the influence of the layered soil to the reflected wave of the piles with internal and external defects. The results show that,the soil modulus difference is the main factor leading to the roughly analogous reflected wave with the pile impedance made for the dynamic curve. And considering the same coefficient of the pile integrity and the same depth of the defects, the dynamic curve of the external necking pile is similar to the bulge one when the soil modulus near the defects close to the pile modulus. However,the dynamic curve of piles with internal and external segregation makes no difference.
出处
《广东土木与建筑》
2013年第12期37-39,共3页
Guangdong Architecture Civil Engineering
关键词
成层土
内外部缺陷
低应变动测
反射波形
桩身完整性
layered soils
internal and external defects
low strain dynamic testing
reflected wave
pile integrity
