USE OF GROUND-PENETRATING RADAR FOR DETECTING VOIDS UNDER A JOINTED CONCRETE PAVEMENT
USE OF GROUND-PENETRATING RADAR FOR DETECTING VOIDS UNDER A JOINTED CONCRETE PAVEMENT
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DOI：
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发表时间：
1987
影响因子：
1.7
通讯作者：
G. Clemeña;M. Sprinkel;R. R. Long-R.
中科院分区：
文献类型：
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作者：
G. Clemeña;M. Sprinkel;R. R. Long-R.
用探地雷达对一条有接缝的钢筋混凝土路面进行的调查表明，雷达提供了一种无损检测技术，可以以每小时5车道英里的速度对路面进行检测，对交通的干扰最小。对一些石板取芯和随后使用的设计水测试表明，雷达在探测深度超过1/8英寸的空隙时是有效的。但在发现浅空隙时效率相当低。总体准确率约为68%，这表明设备的灵敏度需要提高。与雷达装置一起使用的定位组件显示不够准确。对记录的路面下封部分每天使用的灌浆量与每天灌浆板下检测到的空隙总线性英尺进行回归分析，得出的相关性仅为51%。然而，回归被发现在95%的概率水平上是显著的。据信，如果可以方便地估计每个空隙的宽度和深度，以便空隙的程度可以用体积而不是长度来表示，则可以使用一种更成功的估算灌浆量的方法。已经表明，雷达测量获得的信息可用于制定合理且具有成本效益的板稳定操作，其中灌浆孔位置正确。
A survey of a jointed, reinforced concrete pavement with ground-penetrating radar indicated that radar provides a nondestructive inspection technique that can be used at a minimum rate of 5 lane-miles of pavement per hour with only minimal interference with traffic. The coring of some slabs and subsequent use of a devised water test revealed that the radar was effective in detecting voids deeper than 1/8 in. but considerably less effective in spotting shallow voids. The overall accuracy was approximately 68 percent, which indicates that the sensitivity of the equipment needs to be improved. The location component used with the radar unit showed insufficient accuracy. A regression analysis of the recorded quantities of grout used daily in subsealing portions of the pavement versus the total linear feet of voids detected under the slabs grouted each day yielded only a 51 percent correlation. However, the regression was found to be significant at a 95 percent probability level. It is believed that if the width and depth of each void can be conveniently estimated so that the extent of voids can be expressed in terms of volume instead of length alone, an even more successful method of estimating grout quantities would be available. It has been shown that information derived from a radar survey can be useful in developing a sound and cost-effective slab stabilization operation in which grout holes are properly placed.