青山湖隧道H型钢桁架整体模板加固技术

Technique to Reinforce H-formed Steel Truss Monolithic Formwork for Qingshanhu Tunnel

隧道外墙体支模采用对拉螺栓施工工艺是造成箱体漏水的主要原因之一。阐述了青山湖下穿隧道施工过程中,为避免外墙因穿墙对拉螺栓带来漏水隐患,采用H型钢桁架整体模板加固技术,满足了隧道结构防水要求。

For the external wall of the tunnel, formwork supported with the opposite pulling bolts is one of the major reasons for box leakage. Described hereby is the reinforcing technique adopted in construction of the tunnel passing under Qingshan Lake, using the H-formed steel truss monolithic formwork to avoid leakage and meet the waterproof requirement of the tunnel.