Method and device for dynamically analyzing big arch springing CRD stratified excavation footage of cross-section tunnel
A technology of tunnel excavation and analysis method, applied in the direction of neural learning method, special data processing application, instrument, etc., can solve the problems of safety and economic loss, uncertainty of geological conditions, blindness of step distance determination, etc., to achieve Effects of increasing computing speed, large economic significance and social significance
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[0041] Such as figure 1 As shown in the schematic diagram of the CRD excavation section, the number of design sections can be adjusted according to the size of the tunnel section and geological conditions. figure 1 The middle is divided into 8 excavation steps, the excavation sequence is 1→2→3→4→5→6→7→8, the top arch part of the upper layer is in hard rock, and the buckle arch foot and lock foot anchor rod are designed To maintain the stability of the top arch, the CRD block excavation and support methods need to be determined according to the actual conditions of the upper soft and lower hard strata, that is, the upper excavation arch foot should fall in the hard rock range. At this time, large footage can be used. , And the use of large arch foot and lock foot anchor rod technology can still ensure better surrounding rock stability; if the block is in the soft rock range, a smaller footage can be used accordingly; figure 2 The schematic diagram of the CRD layered footage shown...
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