节点文献
高应变动力试桩法检测桩长
DETERMNING THE PILE LENGTH BY HIGH-STRAIN DYNAMIC TESTING
【摘要】 高应变动力试桩法采用数吨重锤锤击,同时实测了桩顶的力信号和速度信号,具有很高的信噪比。在桩基质量检测中,均能获得可靠的桩底反射信息,如获得准确的反射波双程旅行时△t,给定应力波波速C,即可据时距方程L=C×△t/2求出桩长L。并讨论了预应力管桩的应力波纵波平均波速,其值约为4100m/s。
【Abstract】 Under the impact of a large hammer, a high signal noise ratio of the force and velocity can be acquired in the high-strain dynamic testing. In fact, an accurate two-way time of the reflection wave △t can be acquired too, because a reliable toe echo can be obtained from the field curves. According to the time distance equation L=C× △t / 2, if a P-wave speed is given,a reliable pile length L can be got. In addition,this paper discusses the P-wave speed of the pipe pile. And a conclusion C≈4100 m/a is drawn.
- 【文献出处】 桂林工学院学报 ,JOURNAL OF GUILIN INSTITUTE OF TECHNOLOGY , 编辑部邮箱 ,1996年02期
- 【分类号】TU473.11
- 【被引频次】7
- 【下载频次】74