高水位既有地下室结构补桩关键技术

Key Technology of Additional Pile Construction for Existing Basement Structure at High Water Level

在对已有地下室结构进行拆改的工程中,尤其是在由于原桩基设计承载力不能满足新结构需要而进行补桩的工程中,一般存在着施工操作面、泥浆控制、成桩垂直度控制、已建结构保护等方面的难点。为保证桩基施工质量,进而确保后期结构改建的整体施工质量,依托实际工程案例,通过采取原地下室结构加固、楼板开孔、设置钢套筒抬高水位等措施,从而有效地保证了补桩施工过程中的安全及质量。

In the project of demolishing and changing the existing basement structure,especially in the additional pile project,because the design bearing capacity of the original pile foundation cannot meet the needs of the new structure,there are generally difficulties in the aspects of construction operation surface,mud control,pile verticality control and existing structure protection.In order to ensure the construction quality of pile foundation and the overall construction quality of the later structural reconstruction,based on the actual engineering case,the measures such as strengthening the original basement structure,floor slab openings,setting steel sleeve to raise the water level were adopted,so as to effectively ensure the safety and quality in the additional pile construction process.