随着城市规划日益更新,许多城市既有建筑物需要部分拆除。而无粘结预应力楼板拆除后如何保证剩余部分建筑的安全是一个难题。本文采用拆除前将无粘结预应力钢绞线在楼面的保留部分边缘端再锚固后截断的施工方法,可确保无粘结预应力楼板的拆除后剩余部分建筑的安全,并且具有工序易操作、劳动强度低、工程造价低、施工工期短等特点。 As urban planning continues to evolve, many existing buildings in cities require partial dismantling. How to ensure the safety of the remaining part of the building after unbonded prestressed floor is removed is a challenge. In this paper, the unbonded prestressed steel strand is anchored before the edge of the retained part of the floor and then cut off. This ensures the safety of the remaining part of the building after the unbonded prestressed floor is demolished, Operation, low labor intensity, low construction cost, short construction period and so on.