复杂地质条件下紧邻地铁的深基坑支护施工技术  

Construction Technology for Deep Foundation Pit Support Close to Metro Under Complicated Geological Condition

作　　者：董亚兴 

机构地区：[1]中国建筑第二工程局有限公司北京分公司,北京100160

出　　处：《建筑施工》2016年第12期1641-1643,共3页Building Construction

摘　　要：北京葛洲坝大厦工程紧邻地铁,且其深基坑所处的地质条件、周边环境均较为复杂。施工中根据不同的周边环境选择了"1∶0.2放坡+土钉墙+护坡桩锚""挡土墙+护坡桩锚"及桩锚3种不同的支护体系,重点阐述了护坡桩和预应力锚杆施工技术。同时,通过基坑监测和采取的相应措施,掌握了边坡的整体稳定性,保证了基坑的结构安全。A Beijing Gezhou dam building project is adjacent to the subway, and the geological condition and surrounding environment of its deep foundation pit are more complicated. Three different excavation support systems such as ＂1：0.2 sloping ＋ soil nailing wall ＋ slope protection piled anchor ＂, ＂retaining wall ＋ slope protection piled anchor ＂, and the piled anchor have been selected according to the different surrounding environment conditions. The construction technologies of slope protection pile and prestressed anchor have been expounded emphatically in this paper. At the same time, through the foundation pit monitoring and corresponding measures, the overall stability of the slope has been controlled and the structure safety of the foundation pit has been guaranteed.

关 键 词：复杂地质条件 紧邻地铁 深基坑 土钉墙 护坡桩 预应力锚杆 

分 类 号：TU753[建筑科学—建筑技术科学]