临近建筑物深基坑支护设计和监测技术

Support Design and Monitoring Technology of Deep Foundation Pit of adjacent Building

沈阳地铁1号线新宁街地铁站的深基坑,深度达到了18.0 m,且临近办公楼。结合该基坑区域的土层情况和地下水位高程,选取了钢筋混凝土围护桩作为基坑支护主体结构。为最大限度减少基坑周围的地表沉降量,科学设计了围檩和内支撑的预压力,同时制定了详细的施工和监测方案。工程实践表明:理正软件的模拟计算结果与施工中的监测结果高度吻合,保证了施工过程中坑边建筑物的安全,说明计算结果准确可靠,研究成果可为相似基坑的支护和监测提供借鉴。

The deep foundation pit of Xining Street Subway Station of Shenyang Metro Line 1 has a depth of 18m and is close to the office building.Considering the soil layer and the elevation of the groundwater level in the foundation pit area,reinforced concrete retaining piles are selected as the main structure of the foundation pit support.In order to minimize the surface settlement around the foundation pit,scientific design of preload of steel purlin and internal support a detailed monitoring programme has also been developed.Engineering practice shows that the simulation calculation results of Lizheng software are highly consistent with the monitoring results in construction,which ensures the safety of the pit side buildings in the construction process,and also shows that the calculation results are accurate and reliable,which can provide reference for similar foundation pit support and monitoring.