Advance support construction method for high-strength pipe shed of tunnel
A technology of advanced support and construction method, which is applied in the direction of tunnel, tunnel lining, earthwork drilling and mining, etc., can solve the problems of poor flexibility, long construction period, small slurry diffusion radius, etc., and achieve safe and reliable use process, simplified construction process, Ease of drilling process
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[0056] Such as figure 1 A tunnel high-strength pipe shed advanced support construction method shown in the tunnel is divided into multiple sections from the back to the front along the longitudinal extension direction of the tunnel to carry out the pipe shed advanced support construction for the constructed tunnel. The construction methods for the advance support of the shed are the same; when performing the advance support construction of the pipe shed for any segment, the following steps are included:
[0057] Step 1. Construction of guard arch and guide pipe: install a guard arch on the rear side of the face of the current construction section; combine figure 2 and image 3 , the guard arch is a steel arch 1 supporting the arch of the tunnel hole 4, and the steel arch 1 is equipped with a plurality of guide pipes 2 for guiding a plurality of pipe shed pipes 3 respectively;
[0058] The external insertion angles of the plurality of pipe shed pipes 3 are all 1° to 3°, and ...
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