Freezing and sealing device for shield launching tunnel portal
A technology for sealing devices and portals, which is applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problems that the seepage of muddy water under pressure cannot be completely prevented, and achieve improved safety performance and effectiveness, strong sealing ability, and high sealing capacity. Leakage quick effect
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[0044] see Figure 1-4 , a freezing and sealing device for a shield starting portal, comprising a portal steel ring 9, a hinge flap 3, a cord rubber plate 7 and a freezing tube group 8, the portal steel ring 9 is prefabricated on the bottom of an underground diaphragm wall 2 On the starting portal 22, a shield machine 1 and an underground soil layer 6 are respectively provided on both sides of the portal steel ring 9, and the portal steel ring 9 is coaxially arranged with the tunneling axis of the shield machine 1, and the folding page is turned The plate 3 and the cord rubber plate 7 are sequentially fixed on the originating portal 22 side of the portal steel ring 9 by bolts, and the portal steel ring 9 is sequentially provided with a freezing chamber 97, an air pressure chamber 92 and a The hydraulic chamber 91, the freezing tube group 8 are arranged in the freezing chamber 97, the freezing chamber 97 is arranged at the flipping place of the folding flap 3, the freezing pipe...
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