摘要
针对当前锚杆质量检测理论存在的一些问题,提出以柱状多层固体介质模型为基础研究声波在锚杆锚固介质围岩体系中的传播规律,并在该模型条件下进行了数值计算。结果表明,基于柱状多层介质模型的理论用于锚杆锚固质量检测是可行的,实际工作中可以利用其特征参数对锚杆锚固质量进行评价。对于锚杆长度,可以通过反射波旅行时间给予确定;对于水泥胶结情况,可以利用地层波的幅度变化和导波模式波(高频)的特征确定。
In terms of some problems existed in the current theory of bolting systems＇ quality testing, this paper presents a different acoustic propagating property which takes the bolting system as a model of cylindrical multilayered medium, and makes numerical computation in the condition of this model. The results indicate that the method is feasible so that we can use its characteristic parameter to evaluate the condition of bolting systems in practical works. The length of the rock bolt can be ascertained by the travel time of reflection wave, and the quality of concrete cementation can be confirmed by the amplitude change of stratum wave and the （high frequency） character of guided wave and mode wave.
出处
《工程地球物理学报》
2005年第2期114-118,共5页
Chinese Journal of Engineering Geophysics
关键词
锚杆检测
柱状多层固体介质
弹性波理论
bolting system＇s quality testing
cylindrical multilayered medium
elastic wave theory
