Key Green Renovation Technology of Existing Office Building
In order to make effective use of urban land resources and improve the use value of existing buildings,additional floor expansion can be carried out on the basis of existing buildings,which meets the requirements of green and low-carbon renovation.An office building is added to the 18 floors on the basis of the existing 7 floors frame structure.By breaking the basement floor in the addition area,adding steel pipe piles and pouring new raft foundation,the bearing capacity of the foundation is improved.Three-pile caps and steel pipe piles are reinforced by ring beams to ensure that the new raft foundation and the existing foundation can work together.The leakage problem of the new and old concrete joint surface is solved by painting the cement-based permeable crystalline waterproof coating and the water-swelling water-stopping glue.By changing the load transfer layering method,increasing the cross section method and pasting the steel plate method,the bearing capacity and stability of the structure after the renovation are ensured.
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