Abstract：
Numerical simulation and field monitoring were adopted in construction of Fenghuang Mountain Tunnel of Longkou-Yantai railway to analyze tunnel wall rock deformation distribution, characteristics of primary stress at critical position and wall rock plastic zone expansion under different spacing among heading faces in opposite construction, and to propose support schemes for adjacent break-through section. It was shown that when the spacing among heading faces at both sides reduces, the stability of wall rock drops obviously, and rock mass deformation and cracking degree also become more and more severe. Routine support scheme was used when the spacing among heading faces is shorter than 20m; heading face construction at one side was stopped when the heading space reached 20m, and small tube advance support plus cross-section advance curtain grouting were adopted for heading face construction at the other side. The tunnel was successfully cut through.
LI Rong-jian. Study on Optimal Control of Opposite Construction Stability of Cataclastic Rock Shallow-Buried Tunnel[J]. Architecture Technology, 2017, 48(9): 940-.
