| 覃鹏辉,戴兵,李丹立,王敏.下穿既有建筑地铁明挖基坑变形特征及围护结构最大挠度的灰色关联分析[J].南华大学学报(自然科学版),2024,(5):41~49, 77.[QIN Penghui,DAI Bing,LI Danli,WANG Min.Grey Correlation Analysis of Deformation Characteristics and Maximum Deflection of Retaining Structure of Open-cut Foundation Pit of Subway Under Existing Buildings[J].Journal of University of South China(Science and Technology),2024,(5):41~49, 77.] |
| 下穿既有建筑地铁明挖基坑变形特征及围护结构最大挠度的灰色关联分析 |
| Grey Correlation Analysis of Deformation Characteristics and Maximum Deflection of Retaining Structure of Open-cut Foundation Pit of Subway Under Existing Buildings |
| 投稿时间：2024-01-30 |
| DOI： |
| 中文关键词: 下穿建筑 最大挠度 灰色关联度 |
| 英文关键词:underpassed building mximum deflection grey correlation |
| 基金项目:湖南省教育厅重点项目(22A0293)；湖南省教育厅一般项目(22C0235) |
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| 中文摘要: |
| 选择合理的支护方案可以有效地控制基坑变形,保证既有结构的安全。本文以广州地铁十三号线下穿商业建筑的明挖基坑工程为研究对象,采用现场监测和数值模拟相结合的方法对支护结构的变形特征进行了分析,并引入灰色关联分析(grey relation analysis,GRA)对影响围护结构最大水平位移的关键因素进行了研究。结果表明,所有监测值都远小于规定的预警值。此外,坑外的加固钢管桩可有效限制地层变形。影响围护结构最大水平位移的主要因素为:开挖层厚度>钢筋混凝土支撑等级>灌注桩混凝土等级>钢支撑截面尺寸。 |
| 英文摘要: |
| Choosing a reasonable support scheme can effectively control the deformation of the foundation pit and ensure the safety of the existing structure. In this paper, the open-cut foundation pit project of Guangzhou Metro Line 13 underpassing commercial buildings is taken as the research object. The deformation characteristics of the supporting structure are analyzed by means of field monitoring and numerical simulation. The grey correlation analysis (GRA) is introduced to study the key factors affecting the maximum horizontal displacement of the retaining structure. The results show that all monitoring values are far less than the specified warning values. In addition, the reinforced steel pipe piles outside the pit can effectively limit the deformation of the stratum. The main factors affecting the maximum horizontal displacement of the retaining structure are:excavation layer thickness > concrete support concrete grade > cast-in-place pile concrete grade > steel support section size. |
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