微型桩在紧贴既有建筑基坑中的应用

Application of Mini-pile in Deep Foundation Excavation Adjacent to Existing Building

紧贴既有建筑开挖深基坑,对既有建筑的保护是支护的重点和难点。海都大酒店二期采用微型桩+锚杆支护,微型桩起竖向超前支护作用,锚杆施加预应力控制位移。介绍了基坑支护设计与施工要点,并进行信息化施工。保证了既有建筑安全运行。

During deep foundation excavation construction adjacent to existing buildings,protection of the existing building is the key point and difficulty.Support structure of mini-pile + anchor is used in construction of the Haidu Hotel,in which the mini-pile pre-supports at vertical direction,and the prestressed anchor are used for controlling the displacement.Design and construction points of foundation excavation support are introduced.Moreover,information construction is adopted,which ensures safety of the existing building.