软土地区紧邻建筑物的大型深基坑支护技术

Support Technology for Large and Deep Excavation Adjacent to Buildings in Soft Soil Area

以某深基坑工程为例,采用数值分析与监测数据相结合的方式,论述了"排桩+竖向钢斜撑"的支护模式在软土地区紧邻建筑物大型深基坑中应用的可行性。实践证明,数值分析结果与基坑监测数据较为吻合,表明土体硬化模型能较好地模拟软土地区基坑开挖过程中土体的变形规律,可为设计提供有效的变形预估值。

Taking a deep foundation pit project as an example,the application feasibility of the supporting mode of"row piles+vertical steel diagonal bracing"in the large deep foundation pit adjacent to buildings in soft soil area is discussed by combining numerical analysis with monitoring data.The practice shows that the numerical analysis results are in good agreement with the monitoring data of foundation pit,which indicates that the soil hardening model can better simulate the deformation law of soil in the process of foundation pit excavation in soft soil area,and can provide effective deformation prediction value for design.