北京大兴国际机场航站楼核心区工程层间隔震支座及防火包封施工技术

Construction Technology of Seismic Isolation Bearing and Fire-proof Enclosure of Engineering Story in the Core Area of Beijing Daxing International Airport Terminal Building

北京大兴国际机场航站楼核心区工程隔震层由铅芯橡胶隔震支座、普通橡胶隔震支座、弹性滑板隔震橡胶支座和黏滞阻尼器组成。详细介绍隔震支座构造及安装方法;依据隔震支座特点,层间隔震支座采用"防火砖+无机布+防火罩"的多道防火包封,使层间隔震支座耐火极限不低于主体结构耐火极限,保证主体工程安全。

The isolation layer in the core area of Beijing Daxing International Airport Terminal Building is composed of lead rubber isolation bearing,ordinary rubber isolation bearing,sliding rubber isolation bearing and viscous damper. The structure and installation method of isolation bearing are introduced in detail. According to the characteristics of isolation bearing,the isolation bearing is encapsulated by multichannel fire protection with fire brick + inorganic cloth + fire cover,which makes the isolation bearing of storey isolation. The fire resistance limit is not lower than that of the main structure to ensure the safety of the main project.