摘要
文章就测线布设、检测时间、检测频率、操作平台、工序安排等因素对探地雷达检测隧道初期支护背后空洞效果的影响情况进行了分析,认为测线布设不当可导致检测出现盲区;检测时机和操作平台的选择影响雷达数据采集质量和后期图像判读;检测频率不当,可能影响正常施工;合理安排工序是实施施工过程质量控制的前提。并以此提出了有的放矢、动态布设测线、合理安排工序,对检测时机和频率提前策划、注重完善细节等提高检测质量的具体措施。并以实际工程案例说明,这些因素对探地雷达检测的成败与否,以及实际效果起到了决定性的作用。
The effects of survey line layout, survey time, survey frequency, antenna operation platform, operation sequence on the detection of voids behind tunnel support by GPR were analyzed. Results indicated that unsuitable layout of survey lines can result in the blind zones of GPR scan. The selection of survey time and antenna platform influences the acquisition of data and interpretation of processed GPR profiles. Improper survey frequency has unfavourable impact on the operation. Proper arrangement of operation sequence is prerequisite for the implementation of quality control in operation process by GRP.Taking four tunnels＇ inspection by GPR as an example, the paper demonstrates that these factors play a decisive role in the detection of voids behind tunnel support.
出处
《现代隧道技术》
EI
北大核心
2009年第3期100-104,共5页
Modern Tunnelling Technology
关键词
隧道工程
探地雷达
支护背后空洞
Tunnel engineering
Ground Penetrating Radar
Void detection
