动力参数法桩基检测技术的探讨及改进

Discussion and improvement of the dynamic parameter method on pile foundation detection

在分析传统动力学参数法桩基检测技术存在问题的基础上,提出了用不同质量的锤,多次锤击桩顶的锤桩碰撞方法,解决了传统动力参数法测试仪器的读数误差,以及利用地质土工资料求桩土参振折合质量的不便。并针对传统动力参数法在桩基检测过程中,未考虑桩顶露头高度对单桩承载力的影响这一问题,从一维杆件中的应力波传播方程出发,利用分离变量法,推导出桩顶露头高度对单桩承载力的影响关系式。

The problems of the dynamic parameter method on pile foundation detection are analyzed firstly in this paper. The method using some hammers with different weight to collide with the pile is put forward, which overcomes errors of the implement and inconveniences using geological data to get the quality of pile and soil. At the same time, based on the equation of stress wave in the onedimensional pole and using the separated parameters method, the relationship which is not thought about in the traditional dynamic parameter method previously between the height of pile head upon the ground and the bearing capacity of one single pile is proposed.