狭隘场地深基坑工程施工过程围护结构变形分析  

Deformation Analysis of Retaining Structure During Construction of Deep Foundation Pit in a Narrow Site

作　　者：朱正东 李涛涛 ZHU Zhengdong;LI Taotao(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《洛阳理工学院学报（自然科学版）》2022年第1期36-42,共7页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：国家重点研发计划子课题(2016YFC0701702-2);安徽省教育厅项目(2020JXTD063);安徽省住房和城乡建设厅项目(HYB20190141).

摘　　要：为了研究基坑工程施工过程中围护结构变形的变化规律,利用Midas/GTS软件模拟了某狭隘场地深基坑工程施工过程。结果表明:基坑开挖深度较浅时,围护结构顶部变形最大,开挖深度逐渐增加时,围护结构变形从顶部至底部呈“先增大,后减小”的趋势。在进行支护方案设计时,要合理布置内支撑竖向间距;在土方开挖过程中,应重点监测围护结构的水平位移,同时应尽量对称开挖,避免先开挖侧产生较大位移影响围护结构安全。To study the deformation change of the envelope structure in the construction process of the deep foundation pit engineering,the Midas/GTS software is used to simulate the deep foundation pit engineering construction process in a narrow field.Results show that the deformation of the retaining structure top is the largest with the low excavation depth,but with the deep excavation,the deformation of retaining structure tends to increase first and then decrease from bottom to top.In designing the supporting schemes,the vertical spacing of the internal support should be properly set.In the process of earthwork excavation,the horizontal displacement of retaining structures should be monitored.And the symmetrical excavation should be done and avoid the side excavation,which often leads to large displacement and affect the safety of the retaining structure.

关 键 词：狭隘场地 深基坑工程 数值模拟 围护结构变形 

分 类 号：TU473.2[建筑科学—结构工程]