Method for grouting polymers for tunnel protection
A high polymer and tunnel technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve the effects of no disturbance in the lining, strong pertinence, and small additional loads
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[0022] (1) According to the condition of the cavity 1 at the top of the tunnel and the condition of the tunnel lining structure 2, determine the tunnel section that needs protective treatment, such as figure 1 shown;
[0023] (2) Determine the thickness of the polymer buffer layer according to the size and height of the cavity 1 at the top of the tunnel, possible rockfall conditions, and the bearing capacity of the lining structure 2, such as figure 1 shown;
[0024] (3) Polymer grouting technology is used to directly inject high polymer material to the periphery of the lining structure 2 . The material expands rapidly after a chemical reaction to form a polymer buffer layer3, such as figure 2 shown.
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