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高应变检测的原理是在桩顶作用一个高能量冲击,使得桩土体系产生相对位移,激发出桩侧土的摩阻力,根据加速度传感器和应力传感器测得的数据获得桩身的动应力响应曲线,在一些基本假定的基础上,来预估基桩承载力。在实际操作中,锤击能量选择、原始材料收集、检测时间选择、传感器安装以及桩头处理好坏都会影响高应变检测法的准确性和可靠性,因此在使用时应当对这些方面给予足够的重视。
The principle of high strain detection is to exert a high energy impact on the top of the pile so that the pile-soil system will produce relative displacement and stimulate the frictional resistance of pile side soil. The dynamic stress response curve of the pile body is obtained according to the data measured by accelerometer and stress sensor , Based on some basic assumptions, to predict the bearing capacity of the pile. In practice, the selection of hammer energy, collection of raw materials, selection of testing time, installation of sensors and the quality of the pile head will affect the accuracy and reliability of the high-strain detection method. Therefore, these aspects should be given sufficient Pay attention.