密集建筑环境中深基坑开挖变形及对邻近高架桥影响研究
Study on the Deformation of Deep Foundation Pit Excavation and Impact on Neighboring Viaducts in Dense Building Environment
温海珍 1邓峰 2李荣苑 1李大楠 1彭亮1
作者信息
- 1. 南宁城建管廊建设投资有限公司,广西 南宁 530219
- 2. 南宁市地下管网和水务中心,广西 南宁 530028
- 折叠
摘要
文中结合现场监测数据,运用有限元法建立了某深基坑开挖过程数值模型,对城市密集建筑中深基坑开挖围护结构的变形规律以及邻近高架的影响开展研究.结果表明,基坑开挖引起坑外土体发生朝向基坑方向的位移,坑内土体主要表现为隆起变形;土层位移引起的围护结构产生变形沿深度方向呈现先增大后减小的规律,位移最大值出现在开挖面附近;基坑开挖造成高架桥工程桩产生朝向基坑方向的弯曲,并引起上部桥墩及桥面产生变形.
Abstract
Combined with on-site monitoring data,a numerical model of a deep foundation pit excavation process is established using the finite element method to study the deformation law of the deep foundation pit excavation enclosure structure and its impact on the neighboring eleva-tion among dense urban buildings.The results indicate that the pit excavation causes the soil outside the pit to displace in the direction of the pit,while the soil inside the pit primarily exhibits uplift deformation.The deformation of the enclosure structure due to soil layer displacement follows an increasing and then decreasing pattern along the depth direction,with the maximum displacement occurring near the excavation sur-face.The foundation pit excavation leads to the bending of the viaduct construction piles in the direction of the foundation pit and results in the deformation of the upper piers and bridge deck.
关键词
深基坑/邻近高架/数值模拟Key words
Deep foundation pit/Nearby elevated/Numerical simulation引用本文复制引用
基金项目
南宁市科技局重点研发计划(22692193700)
出版年
2024
国家科技期刊平台
NSTL
万方数据