Abstract
The safety of Tongluoshan Tunnel construction and permanent structure , in the 6th light rail line in Chongqing City, is seriously interfered with coal mining area collapsed. Some characters of the goaf, such as the position, scale, groundwater and filling characteristics, had been probe by Ground Penetrating Radar. And then some measures had been taken, such as pipe roof ahead of support, sealers goaf filling pore grouting reinforcement. After disposal in accordance with the monitoring Data of the dynamic adjustment of the support program and to ensure construction safety, and proved the validity of the aforementioned prediction and disposal techniques similar goaf treatment.
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