新江湾城02-1地块深基坑灌注桩的FLAC3D模拟与分析

发布时间：2018-10-13 09:29

【摘要】：改革开放以来,我国经济技术迅速发展,城市高层以及超高层的建筑数量越来越多,建筑基坑深度也是越来越深。基坑工程是一项非常复杂的工程,不仅要确保施工过程能够安全有效的进行,更是要保证施工人员及周围建筑物的安全。因此,在分析基坑变形规律的同时,需要通过信息化施工,及时了解施工过程中围护结构的状态,并应及时反馈到设计与施工中去。以土力学和基础工程中的相关理论为基础,对上海市杨浦区新江湾城02-1地块基坑支护方案进行研究,利用FLAC3D软件在考虑基坑周围环境的情况下对基坑开挖的三种工况进行模拟和分析,研究随基坑随开挖深度的不断增加,基坑土体的水平位移、竖直沉降、土体在X、Y轴正方向的应力以及对内支撑的轴力变化。同时还包含对:围护结构的水平位移和竖直方向的沉降、立柱沉降、围护结构在土体纵深方向的侧向位移等内容进行的监测和分析。通过FLAC3D对基坑模拟的结果和基坑监测得到的数据进行对比,模拟结果与监测数据反映的基坑位移、支撑轴力基本一致。在以后基坑工程的设计过程中,可以应用FLAC3D软件对基坑支护结构位移的发展和最大值做出预测与分析,为工程实践提供参考。
[Abstract]:With the rapid development of economy and technology since the reform and opening up in China, the number of high-rise and super-high-rise buildings in cities is increasing, and the depth of foundation pit is becoming deeper and deeper. Foundation pit engineering is a very complex project, not only to ensure that the construction process can be carried out safely and effectively, but also to ensure the safety of the construction staff and surrounding buildings. Therefore, when analyzing the deformation law of foundation pit, it is necessary to understand the state of the enclosure structure in time through information construction, and to feed back to the design and construction in time. Based on the theory of soil mechanics and foundation engineering, the supporting scheme of foundation pit in Xinjiangwan block 02-1, Yangpu District, Shanghai is studied. By using FLAC3D software to simulate and analyze the three working conditions of foundation pit excavation considering the surrounding environment of foundation pit, the horizontal displacement and vertical settlement of foundation pit soil are studied with the increasing of excavation depth. The stress of the soil in the positive direction of the XY axis and the change of the axial force on the inner support. At the same time, it also includes monitoring and analysis of horizontal displacement and vertical settlement of enclosure structure, settlement of column and lateral displacement of retaining structure in depth of soil. The simulation results of foundation pit and the data obtained from foundation pit monitoring are compared by FLAC3D. The simulation results are basically consistent with the displacement and supporting axial force of foundation pit reflected by monitoring data. In the later design process of foundation pit engineering, the development and maximum displacement of foundation pit support structure can be predicted and analyzed by FLAC3D software, which provides a reference for engineering practice.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU753.3

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