Method for constructing metamorphic rock confined water tunnel
A construction method and pressurized water technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of primary support deformation and cracking, difficulty in controlling excavation contours, and difficult construction operations, etc., to improve rock mass structure , Improve construction conditions, control hazards and destructive effects
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[0016] A construction method for a confined water tunnel in metamorphic rock, such as figure 1 As shown, including the following steps:
[0017] A. Preliminary prediction of surrounding rock level and groundwater development: large or special geological structures and basic geological conditions are generally indicated on the geological data provided by the design. The TSP203 geological prediction system can timely predict the geological section of the tunnel, which can be relatively accurately predicted Geological structure and groundwater development in the upcoming construction period. Preliminary conclusions are drawn through careful analysis of design geological data and TSP system forecast data, and guidance is provided for whether to implement the next step or in which section to adopt advanced exploration hole prediction. Due to the dense joints of the confined water tunnels in metamorphic rock and the fragmented surrounding rock is rich in fissure water, the prediction r...
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