| 巨型基坑开挖对周围环境空间效应影响分析 |
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| 引用本文： | 祁瑞武,邓会元,戴国亮.巨型基坑开挖对周围环境空间效应影响分析[J].水利与建筑工程学报,2021,0(2):178-184. |
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| 作者姓名： | 祁瑞武 邓会元 戴国亮 |
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| 作者单位： | 1．东南大学混凝土及预应力混凝土结构教育部重点实验室，江苏南京210096；2．东南大学土木工程学院，江苏南京210096 |
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| 基金项目： | 国家自然科学基金项目(51478109;51678145)。 |
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| 摘 要： | 大型基坑开挖经常会对周围环境产生不利影响。以南京市某巨形深基坑为例，结合有限元软件进行建模分析，研究不同开挖施工阶段对支护墙自身变形及坑周不同空间位置的变形影响。计算结果表明:坑外土体的位移与支护墙的变形有密切关联，长边方向地表沉降大约是短边方向的两倍；中部处的地表沉降大于角部处的地表沉降，中部处的地表沉降大约是角部处的四倍左右。说明基坑开挖对中部影响较大，角部影响较少，周边环境的影响存在显著的空间效应。
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| 关 键 词： | 巨形基坑 空间效应 周边环境 地表沉降 |
Analysis of Giant Foundation Pit Excavation Influence on the Spatial Effect of Surrounding Environment |
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| QI Ruiwu,DENG Huiyuan,DAI Guoliang.Analysis of Giant Foundation Pit Excavation Influence on the Spatial Effect of Surrounding Environment[J].Journal of Water Resources Architectural Engineering,2021,0(2):178-184. |
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| Authors: | QI Ruiwu DENG Huiyuan DAI Guoliang |
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| Affiliation: | (Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education,Southeast University,Nanjing,Jiangsu 210096,China;School of Civil Engineering,Southeast University,Nanjing,Jiangsu 210096,China) |
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| Abstract: | Excavation of large foundation pits often has unfavorable effects on the surrounding environment.Taking a mega-shaped deep foundation pit in Nanjing as an example,combined with finite element software for modeling analysis,the effects of different excavation and construction stages on the deformation of the supporting wall and the deformation of the space around the pit were analyzed.The calculation results show that the displacement of the soil outside the pit is closely related to the deformation of the retaining wall.The ground settlement in the long direction is about twice that in the short.The ground settlement at the middle is greater than the ground settlement at the corner which is about four times that the corner.It shows that the excavation of the foundation pit has greater impacts on the central part and less on the corner,and there is a significant spatial effect on the surrounding environment. |
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| Keywords: | mega-shaped foundation pit space effect surrounding environment surface settlement |
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