Pre-anchoring rapid tunneling construction method for high-ground-stress large-deformation tunnel

• Main Authors: NIU GUODONG, WEI YONGXING, JIAO KANGJIE, TAO WEIMING, QIN XIAOLIN, HUO JIANXUN, CHEN SIYU, FANG QIANBAO
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2021
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention discloses a pre-anchoring rapid tunneling construction method for a high-ground-stress large-deformation tunnel. The pre-anchoring rapid tunneling construction method for the high-ground-stress large-deformation tunnel can greatly improve construction efficiency of the high-ground-stress tunnel influenced by large-deformation of surrounding rock and save engineering cost on the premise of ensuring structural safety of the high-ground-stress large-deformation tunnel. The pre-anchoring rapid tunneling construction method comprises the following steps that S01, advance drill holes are formed in a tunneling tunnel face, and the advance drill holes are distributed in a diffusion mode at a fixed angle in the tunneling direction within the range of 0-8 m outside a tunneling contour line; S02, pre-stress reinforcing components are installed in the advance drill holes, grouting is conducted, pre-stress is applied to the surrounding rock of an advance core area, and a pre-reinforcing ring surrounding the