关键词: 软土, 历史保护建筑, 深基坑, 基础托换, 建筑平移, 局部盖挖

Abstract: Key technology of partial covered excavation and integral bottom-up construction of underground space under protective historic buildings is introduced based on a case history in Shanghai. After the pre-reinforced historic buildings were transferred to transition positions, the retaining and supporting structures of the excavation were interspersedly constructed with the vertical supporting systems and the B0 slabs of the permanent positions. After that, the historic buildings were transferred to the pre-constructed permanent positions before  underpinning. So that the entire excavation was constructed by the integral bottom-up method while regions under the historic buildings were partial covered excavated. By using the innovative excavation technology, the safety of the historic buildings was achieved while the underground space was integral developed. Furthermore, the construction period was shortened and the construction cost was saved as well. The historic buildings elevated mildly after subsiding slightly during excavation according to monitoring data. The technical scheme and field data may provide reference for similar projects in future.

Key words: Soft Soils, Protective Historic Building, Deep Excavation, Underpinning, Building Translation, Partial Covered Excavation