Nondestructive testing for crack of tunnel lining using GPR |
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Authors: | Liu Dun-wen Deng Yu Yang Fei and Xu Guo-yuan |
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Affiliation: | (1) School of Resources and Safety Engineering, Central South University, 410083 Changsha, China |
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Abstract: | Lining craze, as a common engineering damage, affects the bearing capacity and the safety of tunnels. To improve the capabilities
of the surface crack detection in the tunnel lining, ground penetrating radar (GPR) was employed. The principle and method
of GPR for cracks investigation of tunnel lining were expounded. As an application example, some field measurements in order
to detect the depth of cracks for the tunnel lining were achieved in a new tunnel. All GPR investigations were made with the
antennae of 1 GHz. The cracks of concrete structure were located, and the distributing and depth of cracks are inspected and
estimated by GPR. The results of investigation show GPR is accurate and efficient to detect cracks of tunnel lining.
Foundation item: Projects(50204012; 50490274) supported by the National Natural Science Foundation of China; project supported by the Postdoctoral
Science Foundation of China |
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Keywords: | tunnel lining nondestructive testing(NDT) cracks ground penetrating radar |
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