中国华商金融贸易中心项目临近地铁站,土方开挖及主体结构施工过程中对基坑变形控制要求极高,且业主又有顶板结构提前投入使用的要求.结合该工程实际情况,针对该类工程基坑及地下室结构施工,详述了悬空条件下地下室顶板结构兼作水平内支撑的逆作施工技术要点.,China’s Foreign Trade and Finance Center project is close to the subway station, the excavation of the earth and the main structure construction has high requirement for foundation excavation deformation control, and the owner has requirement of the roof structure into use. Combined with the actual situation of the project and its basement construction, the top-down method construction of underground roof as intal support of deep foundation excavation nearby subway station is described in detail.