【摘要】 结合某含砂砾地层中的地铁基坑工程,对这种非软土地层SMW围护结构变形情况进行了三维数值模拟分析,同时对基坑开挖过程中的围护结构变形和周边地表沉降监测数据进行了对比分析。通过综合分析,SMW围护结构适用于含砂砾地层,而且其刚度优于桩径800 mm、桩间距1400 mm的排桩围护结构。同时对围护结构变形和周边地表沉降的时空分布规律进行了总结,为今后类似工程的变形预测及变形控制值的确定提供有益的参考。更多还原

【Abstract】 According to a deep excavation of subway in gravelly soils,the deformation of SMW retaining structures in non-soft soils is analyzed by three-dimensional numerical analysis.At the same time,the monitoring data of the deformation of retaining structures and the settlement of adjacent ground surface during the excavation of foundation pit are analyzed.Through the comprehensive analysis,the SMW retaining structures are suitable to the gravelly soils and their stiffness is more than that of the row piles with diameter of 800 mm and pile spacing of 1400 mm.The spatial and temporal distribution laws of the deformation of retaining structures and the settlement of the adjacent ground surface are summarized.It may be useful for deformation prediction and determination of control value of similar projects in future.更多还原