Method for reinforcing insulating protection net in unlined tunnel
A technology for protective nets and tunnels, applied in tunnels, shaft linings, tunnel linings, etc., can solve the problems of fiber loss and strength, and achieve the effects of improving service life and reducing wear
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[0025] Embodiment 1, use the anchor backing plate to The insulation protection net is reinforced in the tunnel
[0026] The materials used are as follows:
[0027] Anchor plate, the schematic diagram of which is shown in figure 1 As shown, it is made of galvanized steel sheet in a circular shape with an outer diameter of 180mm, an inner diameter of 25mm, and a thickness of 10mm, and the upper and lower surfaces have the same chamfer as the sides, and the radius of the chamfer is 3mm, Such as figure 2 shown.
[0028] Bolt: Hollow full-length grouted bolt is used, and the anti-corrosion adopts hot-dip galvanizing process. The diameter of the bolt is 25mm, and the length is 1-2.5m (including the exposed section). The specific design length is determined according to the test report of the surrounding rock stress circle.
[0029] Suture rope: use diameter 9mm The rope is used as a sewing rope.
[0030] Auxiliary bolt: used to make the protective net better cling to the su...
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