浅析低应变测试素混凝土桩的波速问题

Velocity Analysis of Low Strain Test of Concrete Pile

对于低应变测试素混凝土基桩,实测弹性纵波波速值偏高问题,一直备受各界人士的关注,尤其是检测行业中对基桩的长度的判定问题缺乏必要的依据。在低应变-维波动理论的前提下,采用应力波反射法对郑州某地基基础考核基地布设的10根素混凝土模型桩进行检测,依据低应变测试数据,采用专业软件对其进行了分析,同时对素混凝土桩波速的取值问题进行了分析、归纳和总结,得出了应力波反射法测试素混凝土桩的合理波速的取值范围,对基桩的测试工作起到了指导作用。

For low strain test of plain concrete pile,the measured elastic longitudinal wave velocity values, has attracted much attention from all walks of life, especially for the detection of industry, determine the length of pile lack of necessary basis, ln the condition of low strain one-dimensional wave theory, the method of stress wave reflection on a Zhengzhou foundation assessment base layout 10 plain concrete pile model test, based on the low strain test data, and the analysis of the professional software, analyzed, and summarized the velocity value of concrete pile, gained the reasonable range of velocity which is tested by the stress wave reflection method, and plays a guiding role for pile testing.