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| | Abstract | | The 2011 off the Pacific coast of Tohoku Earthquake and its aftershock and tsunami have wreaked immense damage on Tohoku area of Japan. Lifelines stalled after earthquakes, such as electric, gas, water or telephone. It caused a huge impact on people's life. One characteristic of this earthquake disaster is that its destruction area is observed over a large region. It caused widespread subsidence damage and liquefaction mainly at coastal area. In this paper, we will report the case studies of surveys conducted on the earthquake affected area for estimating the state of under road structures using multi-channel car-towed Ground Penetrating Radar(GPR). Our car-towed GPR system has 6 antennas on trailer towed by passenger vehicle. By using automobile GPR system, more cost-effective surveys of wide area are possible, and appropriate management of survey results would contribute to effective maintenance of under road structures. |
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