摘要
文章依托轨道交通车站基坑工程,通过数值模拟计算方法,分析了基坑周围地表沉降特征、围护结构位移变化特征,以及基坑周围管线沉降变化特征.结果与建议:1)随着距基坑边缘距离的增大,基坑周围地表的沉降先增大再减小,最终趋于平稳;2)随着基坑开挖深度的增大,基坑围护结构的水平位移,以及顶部的竖向位移逐渐增大,其中基坑长边的变形大于短边;3)随着基坑开挖深度的增大,燃气管线和输水管线与基坑长边对应区域的沉降值逐渐增大;4)在实际基坑开挖过程中,对基坑进行第2道支护时,建议及时布设钢支撑,减小施工产生的风险.
In order to study the deformation law of deep foundation pit excavation in subway stations,the characteristics of surface settlement,displacement changes of retaining structures,and settlement changes of pipelines around the foundation pit through numerical simulation calculation were analyzed in the present article relied on the foundation pit engineering of rail transit stations.The research results showed that:1)the surface settlement around the foundation pit first increased and then decreased as the distance from the edge of the foundation pit increased,and finally tended to stabilize;2)the horizontal displacement of the foundation pit enclosure structure and the vertical displacement of the top gradually increased as the excavation depth of the foundation pit increased,with the deformation of the long side of the foundation pit being greater than that of the short side;3)the settlement values of the gas pipeline and water pipeline in the corresponding area with the long side of the foundation pit gradually increasd when the excavation depth of the foundation pit increased;4)During the actual excavation process of the foundation pit,it is recommended to install steel supports in a timely manner when providing the second support for the pit to reduce the risk of construction.
作者
席丽丽
XI Lili(The First Engineering Co.,Ltd.Of China Railway 18th Bureau Group,Baoding 071000,China)
出处
《西北民族大学学报(自然科学版)》
2025年第4期66-73,共8页
Journal of Northwest Minzu University(Natural Science)
关键词
地铁车站
基坑开挖
沉降值
数值模拟
Subway station
Excavation of foundation pit
Sedimentation Value
Numerical simulation
