The main uses of profiled steel supports
Used for mine tunnels, secondary support of mine tunnels, and support support of mountain tunnels
Construction process flow of profiled steel supports
, centering, waistline Dig the pillar nest and stand the shed beams on the legs to reinforce the back panel (filling).
. Find the position of the column socket according to the center line and the designed shed distance, and then dig the depth of the column socket according to the middle waist line.
. Draw the position of the waist line on the column legs, and place the column in the column socket so that the waist line on the column is consistent with the waist line on the side.
Use tie bars to fix the column to prevent it from tilting.
Check the verticality and skew of the bracket. If it exceeds the allowable error range stipulated in the quality standard, it must be adjusted. According to the vertical line placed in the middle of the top beam and the horizontal spacing between the two column feet, you can To know whether the bracket is vertical, you can know whether the bracket is skewed based on whether the connection between the center line of the tunnel and the two columns is vertical.
When putting on the back plank, the back plank and the back plank, you need to install one piece and fill in one piece (use wooden wedges to tighten the gap between the back plank and the rock plank or fill it all with rocks) and visually inspect the installed back plank. Whether it is flat or not, the backing should be done symmetrically on both sides.
. Metal tie rods should be used between sheds to pull each other tightly through bolt splints, etc. or driven into support columns to strengthen the brackets along the tunnel. Compared with other rigid supports, the steel bracket has retractability and stable and reliable bearing capacity. It can adapt to the load and deformation of soft surrounding rock. It has high cross-section utilization rate, easy support and return of the bracket, small maintenance volume, high bracket recycling and reuse rate, and reduces the number of pits. Use, the environmental benefits are very obvious.
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Shenxiang horseshoe-shaped 29U steel bracket material processing