青岛城阳万象汇新增商务酒店结构加固设计

Structural reinforcement design of New Business Hotel in Chengyang Wanxianghui in Qingdao

青岛城阳万象汇项目原设计地下2层,地上4层,结构屋面高度23.950m,为框架结构体系,基础形式为桩基承台+防水板。2015年主体施工完毕并通过了验收,2016年对原商业部分进行了加固改造,且在原纯地库范围加建一栋10层的商务酒店,建筑总高48.4m。本着'减少拆除、保证安全、兼顾施工'的原则,酒店主体选用框架结构,基础加固设计时最大限度地保留了原结构,新增建筑采用筏板基础。计算时考虑了桩土共同作用工况、桩破坏工况及各荷载工况的影响,对原基础和新增筏板基础在施工及使用阶段的受力进行分析。结果显示,基础沉降、地基承载力均满足规范要求,基础设计安全。同时也表明所设计的筏板基础方案具有现场施工方便、工期短、造价低的优点。

The original design of Chengyang Wanxianghui Project in Qingdao has two stories underground and four stories above ground.The roof height of the structure is 23.950 m.It is a frame structural system and the foundation form is pile cap and waterproof board.In 2015,the construction of the main body was completed and achieved the acceptance of engineering works.In 2016,the original structure was strengthened and reconstructed,and a 10-storey commercial hotel was built in the original pure basement area,with a total height of 48.4 m.In line with the principle of'reducing demolition,ensuring safety and giving consideration to construction',the main body of the hotel adopted frame structure,while the original structure was retained to the maximum extent in the design of foundation reinforcement,and raft foundation was adopted in the new building.The effects of pile-soil interaction,pile failure and load conditions were taken into account in the calculation.The forces acting on the original foundation and the newly added raft foundation during the construction and use stages were analyzed.The results show that the foundation deformation and bearing capacity meet the requirements of the code,and the foundation design is safe.At the same time,it shows that the raft foundation scheme has the advantages of convenient construction on site,short construction period and low cost.