ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2019, Vol. 39 ›› Issue (S1): 188-193.DOI: 10.3973/j.issn.2096-4498.2019.S1.027
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DENG Fangjin
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Abstract:
Groundpenetrating Radar(GPR) is widely applied in engineering test, especially for tunnel lining structure. Based on Finite Difference Time Domain (FDTD) and Perfect Match Layer (PML) absorbing boundary condition, 900 MHz antenna is used to simulate singlelayer and doublelayer reinforced concrete with different spacing, depth and corresponding position. FK migration is used for image processing. The research shows: (1) within the range of effective detection, if the rebar spacing is larger and the depth is deeper, the interference signal is less and the response of the rebar is more obvious; (2) FK migration can identify singlelayer (or upperlayer) rebar, in the process of 2layer reinforcement simulation and migration, the effect of oblique is better than opposite.
Key words: GPR, numerical simulation, single and double rebar, FK migration
CLC Number:
U 45
DENG Fangjin. Forward Modeling and Migration Imaging of Rebar Detection by Ground Penetrating Radar[J]. Tunnel Construction, 2019, 39(S1): 188-193.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2019.S1.027
http://www.suidaojs.com/EN/Y2019/V39/IS1/188
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