地铁盾构下穿振动超敏感建筑物保护措施研究

Study on Protection Technology of Metro Shield Tunneling Under-passing Vibration Hypersensitive Building

长沙地铁6号线某盾构区间侧穿超敏感建筑物湖南省博物馆,为确保盾构施工期间博物馆和馆内文物的安全,本工程采取了合理设置盾构参数、渣土改良、轴线控制、水平运输体系减振、振动效应自动化监测等一系列技术手段。盾构施工过程中振动监测数据表明,博物馆结构物及馆藏文物振速和振级均在允许范围,采取的技术措施和监测方案科学合理,可作为今后类似工程的参考。

A certain shield tunnel section of Changsha metro line 6 passes through the hypersensitive building Hunan Provincial Museum.To ensure the safety of museums and cultural relics during shield construction,a series of technical measures have been adopted,such as reasonable setting of shield parameters,improvement of slag and soil,axial line control,vibration reduction of horizontal transportation system,automatic monitoring of vibration effect and so on.In the process of construction vibration monitoring,the data shows that the speed of vibration and the level of vibration of the museum structure and the cultural relics in the collection are within the permitted range.The technical measures taken and design schemes used are scientifically rational and can be used references for future similar projects.