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 The construction method shown as a tunnel high-strength pipe shed advance support construction method, along the longitudinal extension direction of the tunnel, is divided into multiple sections from back to front to perform the pipe shed advance support construction on the constructed tunnel. The construction methods of the shed advance support are the same; when the pipe shed advance support construction is performed on any section, the following steps are included:
[0057] Step 1. Arch protection and guide pipe construction: install an arch protection on the back side of the tunnel face of the current construction section; combine figure 2 with image 3 , The arch protection is a steel arch frame 1 supporting the arch of the tunnel 4, and a plurality of guide pipes 2 are installed on the steel arch frame 1 to guide a plurality of tube shed tubes 3 respectively;
[0058] The outer insertion angles of a plurality of the tube shed tubes 3 are all 1°~3°, and...
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