Inclined launching method for drainage tunnel shield of nuclear power station

• Main Authors: LIU CHENGQUN, LI JICHAO, LONG HAO, DONG DEWEN
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS

The invention discloses a nuclear power station drainage tunnel shield oblique launching method in the field of tunnel engineering shield method construction. The nuclear power station drainage tunnel shield oblique launching method comprises the steps of launching guide table optimization, reaction frame supporting reinforcement, shield tunneling machine split launching hoisting, special-shaped extension steel ring installation, special-shaped area filling, negative ring and semi-ring splicing, shield tail gap adjustment and smooth oblique launching. Under the condition that the site environment in a nuclear power plant area is limited, launching can be smoothly completed in the state that the tunnel engineering shield tunneling machine and the end wall of the working well form the oblique angle. 本发明公开了隧洞工程盾构法施工领域内的一种核电站排水隧洞盾构斜向始发方法，包括优化始发导台、加强反力架支撑、盾构机分体始发吊装、异形延伸钢环安装、异形区域填充、负环半环拼装、调整盾尾间隙、顺利斜向始发步骤。本发明能够在核电站厂区内场地环境受限情况下，隧洞工程盾构机与工作井端墙呈斜角状态下始发顺利完成。