黏性土地层半盖挖施工影响分析
Analysison the Influence of Half-Cover Excavation on Viscous Soil Layer
凌子锴 1唐永利 2张庆生2
作者信息
- 1. 安徽建筑大学 土木工程学院,安徽 合肥 230601
- 2. 中铁二十四局集团安徽工程有限公司,安徽 合肥 230011
- 折叠
摘要
以合肥市轨道交通科学大道地铁站半盖挖基坑工程为研究对象,结合工程监测数据与FLAC3D有限元软件数值模拟,对比分析黏性土地层半盖挖施工导致两侧土层和围护桩产生的变形差异,并通过改变盖板厚度和中立柱间距模拟研究盖板的挠度变化规律.结果表明:半盖挖基坑整体受偏压荷载导致明挖侧的最大变形量大于盖挖侧,明挖侧围护桩最大变形量所处的深度大于盖挖侧;盖板厚度对其挠度影响较小,呈线性变化;中立柱间距小于 5m时对盖板挠度影响不明显.
Abstract
Taking the half-cover excavation of Hefei Rail Transit Science Road subway station as the research ob-ject,combined with engineering monitoring data and FLAC3D finite element software numerical simulation,the de-formation differences of soil layers and retaining piles caused by half-cover excavation on both sides of the clay layer are compared and analyzed,and the variation rule of the deflection of the cover plate is simulated by chan-ging the thickness of the cover plate and the distance between the middle columns.The results show that the max-imum deformation of the open-cut side is greater than that of the open-cut side,and the depth of the maximum de-formation of the open-cut side retaining pile is greater than that of the open-cut side.The thickness of the cover plate has little influence on its deflection and shows a linear change.When the distance between the middle col-umns is less than 5m,the influence on the deflection of the cover plate is not obvious.
关键词
半盖挖基坑/偏压荷载/数值模拟/沉降变形Key words
half-cover excavation foundation pit/biased load/numerical simulation/settlement deformation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据