Temporary shoring system of tunnel arch wall initial shoring intruding limiting arch replacing construction
A technology of primary support and temporary support, applied in tunnels, tunnel linings, shaft linings, etc., can solve problems affecting the progress of tunnel excavation, arch tilting and collapse, unstable foundations, etc., and achieve high practical value and support Stabilize and solve the effect of tilting and collapsing
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[0040] Such as figure 1 , figure 2 and image 3 As shown, the present invention includes a temporary inverted arch arranged in the segment to be replaced and a plurality of portal support structures arranged on the temporary inverted arch from front to back and supporting the arch 4 to be replaced. The section to be changed is the section where the initial support structure of the tunnel in the upper part of the tunnel 1 has been completed and the lower part of the tunnel has not been excavated; the temporary invert is arranged along the longitudinal direction of the tunnel, and the temporary invert is located The inner bottom of the upper part of the tunnel 1; the required replacement arch 4 is a steel arch that supports the arch wall of the upper part of the tunnel 1 in the initial support structure of the tunnel. All the steel arches in the initial support structure of the tunnel are the arches that need to be replaced 4; the end of the segment that needs to be replaced is t...
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