水平简谐荷载对深基坑开挖变形的影响
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摘要
深基坑开挖过程中,由于土体内应力重新分配,导致基坑及周边环境产生变形,影响基坑及周围建筑的安全。论文建立了深开挖条件下基坑变形简化分析模型;采用非线性有限元法,计算了水平简谐荷载作用下支护桩的测向位移、坑底土体隆起量以及地表沉降量,并对深开挖条件下产生的动位移和静位移进行了对比分析,得出了具有工程意义的结论。
In the process of excavation of deep foundation pits,the deformation of foundation and surrounding environment will be generated due to new stress distribution of soil and their security should be considered.A simplified analysis model of foundation pits is established by using nonlinear FEM,the lateral deformation of pile,basal heave of soil and ground sinking are calculated.After making a comparison between dynamic deformation and static deformation,some valuable conclusions for engineering have been drawn.
In the process of excavation of deep foundation pits,the deformation of foundation and surrounding environment will be generated due to new stress distribution of soil and their security should be considered.A simplified analysis model of foundation pits is established by using nonlinear FEM,the lateral deformation of pile,basal heave of soil and ground sinking are calculated.After making a comparison between dynamic deformation and static deformation,some valuable conclusions for engineering have been drawn.
引文
[1]余志成,施文华.深基坑支护设计与施工[M].北京:中国建筑工业出版社,1997.(Yu Zhicheng,Shi Wen-hua.Design and construction for deep foundation pits[M].Beijing:Architecture industry press,1997.(inChinese))
[2]秦四清等.深基坑工程优化设计[M].北京:地震出版社,1998.(QingG Siqing.Optimal design for deepfoundation engineering[M].Beijing:Earthquake press,1998.(in Chinese))
[3]Hashash Y M A,Whittle A J.Ground movement predic-tion for deep excavations in soft clay.J Geotech.Eng.ASCE.1996,122(6):85-92
[4]段绍伟,沈蒲生.深基坑开挖引起混凝土路面断裂分析[J].工程力学,2004,21(3):40-43.(Duan Shao-wei,Sheng Pusheng.A crack analysis of concrete roadwith excavation of deep foundation pits[J].EngineeringMechanics,2004,21(3):40-43.(in Chinese))
[5]刘忠.单桩横向非线性动力响应简化分析方法研究[D].湖南:湖南大学,2004.(Liu Zhong.The researchon simplified analysis methods about lateral nonlineardynamic responses of single piles[D].Doctorate thesisof HuNan University,2004.(in Chinese))
[2]秦四清等.深基坑工程优化设计[M].北京:地震出版社,1998.(QingG Siqing.Optimal design for deepfoundation engineering[M].Beijing:Earthquake press,1998.(in Chinese))
[3]Hashash Y M A,Whittle A J.Ground movement predic-tion for deep excavations in soft clay.J Geotech.Eng.ASCE.1996,122(6):85-92
[4]段绍伟,沈蒲生.深基坑开挖引起混凝土路面断裂分析[J].工程力学,2004,21(3):40-43.(Duan Shao-wei,Sheng Pusheng.A crack analysis of concrete roadwith excavation of deep foundation pits[J].EngineeringMechanics,2004,21(3):40-43.(in Chinese))
[5]刘忠.单桩横向非线性动力响应简化分析方法研究[D].湖南:湖南大学,2004.(Liu Zhong.The researchon simplified analysis methods about lateral nonlineardynamic responses of single piles[D].Doctorate thesisof HuNan University,2004.(in Chinese))
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