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。
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 elevation 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 surface.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.
作者
温海珍
邓峰
李荣苑
李大楠
彭亮
Wen Haizhen;Deng Feng;Li Rongyuan;Li Danan;Peng Liang(Nanning Urban Construction Pipeline Corridor Construction Investment Co.Ltd.,Nanning,Guangxi 530219;Nanning Underground Pipe Network and Water Center,Nanning,Guangxi 530028)
出处
《江西建材》
2024年第3期170-172,共3页
Jiangxi Building Materials
基金
南宁市科技局重点研发计划项目《基于多源数据的城市综合管廊监测预警系统关键技术及联动处置机制研发与应用》(编号:22692193700)
关键词
深基坑
邻近高架
数值模拟
Deep foundation pit
Nearby elevated
Numerical simulation
作者简介
第一作者:温海珍(1985—),男,广西上林人,本科,工程师,主要研究方向为地下工程施工技术
