Shield tunnel end reinforcement method

• Main Authors: JIANG XIAOQIANG, MAO WENQI, HUANG YU, CHEN JIAYU, QIU SHUIGEN, WU ZHAOYOU, ZHANG QING, TANG JIANZHONG, ZHANG SHUN
• Format: Patent
• Language: Chinese; English
• Published: 12.07.2019
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention discloses a shield tunnel end reinforcement method. The shield tunnel end reinforcement method comprises the steps that a three-axis mixing pile or a high-pressure jet grouting pile is adopted to reinforce a stratum at a tunnel door, so that soft soil is hardened to increase the stratum strength at the tunnel door; and then in a working well in which a shield machine starts or arrives, a certain number of freezing holes in the extending direction of a shield tunnel are inwardly arranged in a wall to be constructed in the circumferential direction of the tunnel door, and freezingtubes are arranged in the freezing holes for freezing and reinforcing the stratum at the tunnel door. The shield tunnel end reinforcement method solves the problems that the safety risks of start andarrival of the shield machine are increased due to the fact that the environment at the tunnel door is relatively complicated and cement system reinforcement in the form of a combination of the three-axis mixing pile and the h