APPLICATION OF GROUND PENETRATING RADAR TO DISEASE DETECTION OF KUNLUN MOUNTAIN TUNNEL
(1. School of Civil Engineering，Beijing Jiaotong University，Beijing 100044，China；2. Testing Institute of Base-structure，
China Academy of Railway Sciences，Beijing 100044，China)
Abstract：Opening and operation of Qinghai—Tibet Railway line has almost been 4 years. In order to obtain the actual operating state of the tunnel，Kunlun Mountain tunnel，one of the permafrost tunnels in the cold plateau region，is detected by soundness diagnosis testing method. In order to keep the normal operation of the tunnel，the ground penetrating radar is used to detect tunnel damage during the absence of train. The detection results show that the general appearance of tunnel lining is in poor quality in the cold plateau environment，and the phenomena of fall-block and seepage appear at both ends of it. The lengths of detected line for empty defect behind the lining reaching serious and very serious level are 59 and 61 m separately，both of which take up the total tested length of 0.70% and 0.72%，respectively；the detected length of backfill undense defect as serious level is 10 m，taking up 0.12% of the total detected line length. Furthermore，test data also indicate that the tunnel in plateau-frozen atrocious environment is more prone to occur disease due to temperature and frost force；and the durability of tunnel is affected seriously. The detected results can provide reliable basis for normal operation and disease management of the tunnel in the future.
中华人民共和国行业标准编写组. TB10013-2004铁路工程物理勘探规程[S]. 北京：中国铁道出版社，2004.(The Professional Standards Complication Group of People¢s Republic of China. TB10013-2004 Specification for geophysical prospecting of railway engineering[S]. Beijing：China Railway Publishing House，2004.(in Chinese))
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2010, Vol. 29 
