一种新的混凝土桥梁无损测试技术  

A New Non destructive Testing Technique for Concrete Railway Bridge Using Ground Penetrating Radar

作　　者：徐美庚[1] 殷宁骏[1] 杨梦蛟[1] 周立功 

机构地区：[1]铁道部科学研究院 [2]北京东方高科技开发有限公司

出　　处：《中国铁道科学》1999年第3期61-69,共9页China Railway Science

摘　　要：本文介绍了一种新的无损测试技术——基于电磁波原理的探地雷达及其在后张预应力混凝土铁路桥梁中的首次评估试验。探地雷达具有重量轻、操作简便、测试可靠等特点。试验研究结果表明，探地雷达测试技术可用于混凝土梁的钢筋和预应力钢束布置、裂缝分布及其深度、混凝土保护层厚度、预应力管道灌浆密实与否等项点的现场评估试验。目前仅可对预应力管道灌浆密实与否作出定性地判断， 有待于继续深入开发研究， 具有良好的开发应用前景。The paper introduces a new nondestructive testing technique using Ground Penetrating Radar based on the principle of electromagnetic waves and its first application in field assessment test of PC railway bridge in China.GPR has the features of low weight,simple operation and reliable test results.This field test demonstrated that GPR can be used to determine the distribution of reinforcing bars or prestressed tendons,crack depth and distribution the thickness of concrete cover,and the grouted density in prestressed tendon ducts of PC railway bridges.So far the grouted density in prestressed tendon ducts can be determined only qualitatively.Further research and dcvelopment efforts are necessary while the future of this technique is of promise.

关 键 词：探地雷达 铁路桥 预应力混凝土桥 无损检测 

分 类 号：U448.136[建筑科学—桥梁与隧道工程] U448.356[交通运输工程—道路与铁道工程]