影响低应变法基桩检测准确性的因素分析及改进措施

Factor Analysis Affecting Accuracy in Low Strain Dynamic Testing of Pile and Improvements

低应变反射波法是目前国内外使用最广泛的一种基桩无损检测方法。但是在实际检测过程中,由于现场地质条件及施工工艺等因素,使得检测结果可能出现多解性和不确定性,给基桩检测结果准确判定带来一定的困难。为提高检测水平,减少误判,很有必要分析研究其有关的影响因素。本文就检测前准备工作、传感器的安装、激振问题和分析判定几个方面进行了总结和分析,提出了改进检测技术的有效措施,经现场实施取得较好效果,对类似检测工作具有一定参考作用。

Low strain integrity testing method is a non-destructive test method that has been used widely to evaluate the quality of pile at home and abroad at present.But in practice,because of the geological conditions and construction process and other factors,there are some ambiguities and uncertainties from the results,so it is difficult to accurately determine the pile testing results.In order to improve the detection ability and reduce the miscarriage of justice,it is necessary to study and analyze its related factors.In this paper,the preparation work of pre-testing,installation of sensor,vibration problems and analysis and so on were summarized and analyzed,and put forward some effective measures to improve the detection technology.Lastly,the good effect has been achieved in practice,and it is a certain reference for similar detection.