地下空间开挖与高层建筑基础相互影响分析

Study on the Interaction between Underground Excavation and Foundation of High-rise Building

研究和探索城市地下空间的开发利用,首先必须分析地下硐室开挖与地表建筑物基础之间的相互影响。通过结合重庆某开发建设项目,采用2D-σ/3D-σ有限元结构分析程序,具体分析了未受到任何人为扰动影响的天然状态、仅在地表建造有建筑物的状态及既在地表建造有建筑物又在地下开挖有隧道的状态等3种不同状态下的地表建筑物地基基础及其地下隧道围岩的应力与位移演变规律,探讨了地下空间围岩与地表建筑物地基基础之间的相互影响,所取得的研究成果将为城市地下空间的开发利用,尤其是在高层建筑物地下开挖硐室时的工程设计和工程施工提供重要的参考依据。

To explore and utilize the urban underground space,the mutual influence of the underground excavation and the foundations of building on each other is studied. In this paper, the evolvement law of stress and displacement in the rock-mass related to the underground excavation and the foundations of building is analyzed under the natural state, the state with the building on the ground and the state with the building on the ground and underground excavation by the 2D-σ/3D-σ program, taking account of a construction situation at Chongqing. The mutual influence between the underground excavation and the foundations of building is studied. The result will provide references for the under-ground space utilization and the project designing and the construction of the tunnel under buildings in the future.