LI Song-bai, FANG Li-gang, LI Hong-quan. Analysis of influence of steel tube pre-reinforced construction on tunnel rock deformation[J]. 2006, 27(2).DOI:
In the entrance zone of the tunnel with fleet mantle soil
loose and unstable wall rock
many slits appeared during the excavation. Through comparing several schemes
steel tube-grouting was adopted to reinforce the wall rock and the foundation of the tunnel. While grouting construction began
excavation also carried through inside the tunnel. This will unavoidably affect the stability and safety of the tunnel. Therefore
a practical project is offered and the monitoring data are analysed under the circumstance of several working procedure affected each other. Some preliminary conclusions are drawn.