| 赵平,程雪芬.狭长深基坑开挖引起的地表沉降变形及影响因素分析[J].唐山学院学报,2022,35(3):60-66 |
| 狭长深基坑开挖引起的地表沉降变形及影响因素分析 |
| Analysis of Ground Surface Settlement and Deformation Caused by Long and Narrow Deep Foundation Pit and Its Influencing Factors |
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| DOI：10.16160/j.cnki.tsxyxb.2022.03.009 |
| 中文关键词: 狭长深基坑 地表沉降 现场监测 数值模拟 影响因素 |
| 英文关键词: long and narrow deep foundation pit ground surface settlement field monitoring numerical simulation influencing factor |
| 基金项目:国家自然科学基金(51874112);安徽省质量工程教研项目(2020jyxm2007);铜陵学院科学研究项目(2021tlxyds16) |
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| 中文摘要: |
| 狭长深基坑的开挖会对周边环境产生较大影响。鉴于此,文章基于有限元软件MIDAS GTS建立三维模型,重点分析基坑开挖过程中周围地表沉降的发展规律,并将数值模拟结果与施工现场监测数据进行对比,结果表明二者数据吻合良好。在此基础上对狭长深基坑开挖引起的地表沉降变形的影响因素进行分析,结果表明:基坑周围地表沉降值对基坑开挖深度敏感,且随着基坑开挖深度的增加而逐渐增大;地表最大沉降值出现在离墙后约8 m的位置,地表沉降的主要影响范围为0.5He~1.5He;增大地连墙厚度和嵌入深度、减小内支撑水平和竖向间距均使地表沉降值呈现减小趋势。 |
| 英文摘要: |
| The excavation of long and narrow deep foundation pit will have a great impact on the surrounding environment. Therefore, the three-dimensional model based on finite element sofeware MIDAS GTS is established to mainly analyze the rules of the surrounding ground surface settlement during the excavation. Then, the simulation values are compared with the field monitoring results based on the field monitoring data of MIDAS GTS, which have proved to be well-matched, on this basis, the influencing factors for the ground surface settlement and deformation are analyzed. The results show that the surface settlement around the foundation pit is sensitive to the excavation depth,and it increases gradually with the depth of the foundation pit; The maximum surface settlement occurs at about 8 m away from the wall, and the main influencing range is 0.5He to 1.5He (He is the excavation depth of foundation pit); increasing the thickness and embedded depth of the diaphragm wall, and reducing the horizontal and vertical spacing of the inner support will reduce the surface settlement. |
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