填海淤泥夹砂地层深基坑安全稳定性分析  

Analysis of the Safety and Stability of Deep Excavations in Reclamation Silt and Sand-Filled Strata

作　　者：汪宇 WANGYu(China Railway 22nd Bureau Group Rail Engineering Co.Ltd.,Beijing 100043,China)

机构地区：[1]中铁二十二局集团轨道工程有限公司,北京100043

出　　处：《铁道建筑技术》2025年第4期210-213,218,共5页Railway Construction Technology

基　　金：中铁二十二局集团有限公司科技研究开发计划项目(2024-18C)。

摘　　要：为探究填海淤泥夹砂地层条件下深基坑变形规律,以青岛地铁5号线欢乐滨海城站工程为研究对象,基于3DEC软件,对基坑开挖过程中周边土层的水平位移、竖直位移及地连墙水平位移进行分析。结果表明:在基坑开挖过程中,基坑周边土层水平位移和竖直位移随开挖深度增加逐渐增加,总体地表土层与基坑距离越远位移越小。最大水平位移发生在基坑外侧8 m位置,最大竖直位移发生在邻近基坑部位,但地层总体较为稳定。地连墙最大水平位移发生在地连墙高度的1/2左右,需在该部位加强支护。To investigate the deformation law of deep foundation pits in reclamation silt and sand-filled strata,this study focuses on the Happy Binhai City Station Project of Qingdao Metro Line 5.The 3DEC software was employed to analyze the horizontal and vertical displacements of surrounding soil strata and the horizontal displacement of the diaphragm wall during foundation pit excavation.The results indicate that throughout the excavation stages,both horizontal and vertical displacements of the soil surrounding the foundation pit exhibit an increasing trend with greater excavation depth.Notably,the overall surface soil layer experiences smaller displacements at greater distances from the foundation pit.The maximum horizontal displacement is observed 8 meters outside the foundation pit,while the maximum vertical displacement predominantly occurs in proximity to the foundation pit.However,the soil layer in general remains relatively stable.Concerning the ground connection wall,the maximum horizontal displacement is identified at approximately half of its height,suggesting the need for additional support in this specific region to enhance stability.

关 键 词：深基坑 填海淤泥夹砂地层 水平位移 地表沉降量 

分 类 号：TU473.2[建筑科学—结构工程]