基于FLAC3D模拟技术的深基坑变形规律研究  

Deformation law of deep foundation pit based on FLAC3D modelling

作　　者：张军贤 王清标[2] ZHANG Junxian;WANG Qingbiao(Architecture and Civil Engineering Institute,Taizhou Vocational&Technical College,Taizhou 318000;National Engineering Laboratory for Coalmine Backfilling Mining-state Key Laboratory Breeding Base of Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266590)

机构地区：[1]台州职业技术学院建筑工程学院,台州318000 [2]山东科技大学煤矿充填开采国家工程实验室-矿山灾害预防控制重点实验室,青岛266590

出　　处：《矿产勘查》2020年第6期1303-1307,共5页Mineral Exploration

基　　金：国家自然科学基金(编号:41372289)资助。

摘　　要：因深基坑失稳造成的工程事故严重威胁着技术人员的生命安全,影响着工期的长短。通过FLAC3D对深基坑开挖进行数值模拟,分析现场检测结果,得到地表沉降最大点沉降量最大点距基坑边缘11. 2 m,最大沉降量为18. 9 mm,基坑边界无穷远处,地表基本没有沉降,在靠近围护桩底端出现受力反弯点,基坑开挖4. 5 m后支护侧向变形量达到最大,且最大变形为24. 9 mm。The engineering accidents caused by the instability of deep foundation pit seriously threaten the life safety of technicians and affect the duration of the project. The numerical simulation of deep foundation pit excavation is carried out by FLAC3 D,and the field test results are analyzed. It is found that the maximum settlement is 11. 2 m from the edge of foundation pit,and the maximum settlement is 18. 9 mm. There is no settlement on the ground near the boundary of foundation pit,and there is a point of stress reverse bending near the bottom of enclosure pile. After excavation of foundation pit for 4. 5 m,the lateral deformation of support reaches the maximum,and the maximum deformation is 24. 9 mm.

关 键 词：深基坑 变形 沉降量 围护桩 滕州 山东 

分 类 号：TU473[建筑科学—结构工程]