Optimization for Grouting Hole Location of Concrete-filled Steel Tubular Support

Concrete-filled steel tubular stent has high bearing capacity, convenient construction, low cost, and other advantages, which gradually be applied to the roadway supporting. However, grouting hole cracked in some use, which influences the overall stability of the support. We use numerical simulation to study the mechanical properties of the support, find that grouting hole cracking is mainly due to the location of the unreasonable hole, and determine the optimal grouting hole.