| On the background of Dalian subway project 207 Section Engineering, Cross hole resistivity CT and geological radar method of adverse geological formation body forecast technology based on, through the development of ground in the tunnel cross hole resistivity CT detection, the geological radar detection, the city subway tunnel excavation construction process of unfavorable geologic bodies or disaster sources accurately forecast in advance.System by analyzing the cause of city metro tunnel water inrush disaster causing water and water containing structure, studied the process of hydraulic characteristics and laws of city subway karst formation under the conditions of the. Through mathematical derivation and theoretical calculation test, get the basic characteristics and laws of sudden hydraulics, based on the study of hydraulic characteristics and regularity of karst formation process, through the establishment of model and the corresponding numerical analysis, the evolution mechanism of water conductive fault induced cracking channel, carry out layered cement grout diffusion test research division.Summed up the general principles and Countermeasures in design and construction of karst tunnel should follow. Treatment technology for city underground karst formation was further study lay the foundation for sound. |
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