桩锚式支护基坑的开挖变形分析及预测
发布时间：2018-12-25 07:55
【摘要】：为了研究基坑开挖的变形规律以及变形的预测,以国家地理信息科技产业园5A地块的基坑工程为背景,针对基坑变形的形态、变形的影响因素和变形的控制进行了研究,同时对桩锚支护结构的作用机理进行了分析；结合该基坑的设计和施工情况,对该基坑的桩顶水平位移以及周围的地表沉降变形进行现场监测,通过对监测数据的分析得到了该基坑的变形规律；利用灰色理论的关联度分析,以监测的数据为参考依据,对观测点之间以及位移和沉降之间的关联度进行了分析,得到了它们之间的关联程度；同时利用GM(1,1)模型对基坑开挖的变形进行了预测应用,验证了GM(1,1)模型在基坑的变形预测中精度较高,可以用来进行变形的预测；利用MIDAS有限元分析软件对该基坑的开挖进行模拟,通过模拟结果对开挖的变形规律进行了分析,同时对施工中的超挖和超载对基坑的变形影响进行了模拟,分析了超挖和超载对基坑开挖的影响规律。
[Abstract]:In order to study the deformation law and prediction of foundation pit excavation, taking the foundation pit engineering of 5A block of National Geographic Information Science and Technology Park as the background, the shape of foundation pit deformation, the influencing factors of foundation pit deformation and the control of deformation are studied. At the same time, the mechanism of pile-anchor supporting structure is analyzed. Combined with the design and construction of the foundation pit, the horizontal displacement of the pile top and the ground subsidence deformation around the foundation pit are monitored on the spot, and the deformation law of the foundation pit is obtained through the analysis of the monitoring data. Based on the data of monitoring, the correlation degree between observation points and between displacement and settlement is analyzed by using the correlation degree analysis of grey theory, and the correlation degree between them is obtained. At the same time, the GM (1t1) model is used to predict the deformation of foundation pit excavation. It is verified that GM (1t1) model has high accuracy in the prediction of foundation pit deformation, and it can be used to predict the deformation of foundation pit. The MIDAS finite element analysis software is used to simulate the excavation of the foundation pit. The deformation law of the excavation is analyzed through the simulation results, and the influence of overexcavation and overload on the deformation of the foundation pit is simulated. The influence of overexcavation and overload on foundation pit excavation is analyzed.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU753
本文编号：2390888
[Abstract]:In order to study the deformation law and prediction of foundation pit excavation, taking the foundation pit engineering of 5A block of National Geographic Information Science and Technology Park as the background, the shape of foundation pit deformation, the influencing factors of foundation pit deformation and the control of deformation are studied. At the same time, the mechanism of pile-anchor supporting structure is analyzed. Combined with the design and construction of the foundation pit, the horizontal displacement of the pile top and the ground subsidence deformation around the foundation pit are monitored on the spot, and the deformation law of the foundation pit is obtained through the analysis of the monitoring data. Based on the data of monitoring, the correlation degree between observation points and between displacement and settlement is analyzed by using the correlation degree analysis of grey theory, and the correlation degree between them is obtained. At the same time, the GM (1t1) model is used to predict the deformation of foundation pit excavation. It is verified that GM (1t1) model has high accuracy in the prediction of foundation pit deformation, and it can be used to predict the deformation of foundation pit. The MIDAS finite element analysis software is used to simulate the excavation of the foundation pit. The deformation law of the excavation is analyzed through the simulation results, and the influence of overexcavation and overload on the deformation of the foundation pit is simulated. The influence of overexcavation and overload on foundation pit excavation is analyzed.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU753
【参考文献】
相关期刊论文 前10条
1 孙钧,袁金荣;深大基坑施工变形的智能预测与控制[J];地下工程与隧道;2000年04期
2 陈立樟;;灰色预测在基坑变形监测中的应用[J];福建建设科技;2010年05期
3 卢助民;;深基坑开挖地表沉降计算方法研究[J];湖南交通科技;2010年02期
4 高文华,杨林德;软土深基坑围护结构变形的三维有限元分析[J];工程力学;2000年02期
5 朱爱国,沈永洋;关于基坑支护设计现状的几点认识[J];广西土木建筑;2000年01期
6 孙海宁;;深基坑监测测点布置及优化方法研究[J];广州建筑;2012年03期
7 王玲玲,刘汉东,谢英华;深基坑变形的灰色预测模型[J];华北水利水电学院学报;1999年03期
8 张永进;考虑土体性质影响的基坑地面沉降变形计算[J];建筑结构;2000年11期
9 吕凤梧,徐伟 ,刘建航;深基坑开挖支护的弹塑性有限元数值模拟与分析[J];建筑技术;2002年02期
10 李爱国;袁宝远;陈艳国;赵燕容;任丽芳;;灰色神经网络在深基坑位移预测中的应用[J];人民黄河;2006年04期
相关博士学位论文 前2条
1 杨庆年;武汉地铁车站深基坑变形特性分析[D];华中科技大学;2010年
2 胡贺松;深基坑桩锚支护结构稳定性及受力变形特性研究[D];中南大学;2009年
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