公路桥梁基桩质量缺陷的声学参数特征  

Acoustic Parameter Features of Quality Defects in Foundation Piles of Highway Bridge

作　　者：习小华 刘永明 XI Xiaohua LIU Yongming(Jiangxi Transportation Institute, Nanchang Jiangxi 330020, Chin)

机构地区：[1]江西省交通科学研究院,江西南昌330020

出　　处：《铁道建筑》2017年第4期52-55,共4页Railway Engineering

摘　　要：工程中广泛采用超声波透射法对公路桥梁基桩的质量缺陷情况进行检测。通过工程实践及研究发现:超声波在不同质量缺陷中传播时,其波形及波速、波幅、频率等声学特征参数会发生变化,主要表现为波幅变弱、波速降低、接收波形发生畸变等;不同的缺陷可能表现为波的声学特征参数变化相同,相同的缺陷可能表现为波的声学特征参数变化不同。Ultrasonic transmission method is widely used in engineering to detect the quality defects in foundation piles of highway bridge. Through the engineering practice and research, it is found that waveforms and the acoustic parameters such as wave velocity, amplitude and frequency will change when the ultrasonic waves propagate in different quality defects, which mainly show that the amplitude is weakened, the wave velocity decreases and the receiving waveform is distorted. Different defects may be expressed as the same variations in acoustic characteristic parameters of the wave, and the same defects may be expressed as different variations in the acoustic characteristic parameters of the wave.

关 键 词：公路桥梁 基桩质量检测 工程检测 质量缺陷 超声波透射法 声学参数 

分 类 号：TU473.1[建筑科学—结构工程] U443.154[建筑科学—土工工程]