瞬变电磁结构雷达研究

Transient Electromagnetic Structure Radar Research

摘要: 目前混凝土结构病害探测仍以地质雷达为主，在重要部位适当少量配合取芯钻孔，由于高频微波段地质雷达穿透能力的局限性，而钢筋混凝土结构钢筋密布，使得混凝土结构病害及成因检测存在许多难题。本文首次利用瞬变电磁法原理，区别地质雷达高频一次场而采用瞬变电磁法的二次场，利用欠阻尼中心回线装置、全期视电阻率计算、拟地震波谱处理与显示等技术，成功研制了瞬变电磁结构雷达，并在不同混凝土结构上与美国劳雷SIR-30E雷达、意大利IDS-RIS雷达进行试验对比，总结了混凝土结构病害的视电阻率特征与类型，说明用视电阻率法探测混凝土结构病害的可行性，为瞬变电磁法在混凝土结构探测方面开辟新的应用。

Abstract: Concrete structure disease can be detected mainly by using ground penetrating radar now. The coring hole should be fit in a few important parts. Due to the limitation of high frequency geological radar penetration capability, reinforced concrete structure has the clusters of steel. There are many problems in the detection of concrete structure diseases and causes. The principle of tem is first used in Transient Electromagnetic method. The second field of the transient electromagnetic method is used to distinguish the high frequency primary field of the geological radar, using underdamping response central loops unit and the total period apparent resistivity calculation and the seismic wave spectrum processing and display techniques. The transient electromagnetic structure radar was developed successfully, and the comparison of the different concrete structures with the US radar SIR-30E and Italy IDS-RIS radar is in detection of concrete structures. The characteristics and types of apparent resistivity of concrete structural diseases were summarized. The feasibility of using apparent resistivity to detect the structural diseases of concrete is presented. A new application of tem in concrete structure detection is introduced for Transient Electromagnetic method.