阜新鑫亚国际酒店基坑变形监测与数值模拟分析
发布时间:2018-06-05 05:38
本文选题:深基坑 + 桩锚支护体系 ; 参考:《辽宁工程技术大学》2013年硕士论文
【摘要】:随着城市建筑高度不断增加,基础的开挖深度也随之增加,从而出现了大量的基坑工程。由于基坑工程的复杂性,基坑变形的计算理论尚不够成熟,因此对基坑变形规律的研究具有重大的现实意义。本文以阜新鑫亚国际酒店基坑工程为背景,结合理论分析、现场监测和数值模拟等多种手段,对基坑支护结构的变形进行了深入的研究,具体包括以下几方面的内容: (1)归纳了基坑支护的基本类型,总结了国内外关于基坑工程的支护结构设计理论、基坑变形计算方法,对支护结构体系的适用范围和经济性进行了阐述,详细介绍了桩锚支护结构体系的计算理论; (2)结合阜新鑫亚国际酒店基坑工程,对现场监测过程中所获得的数据进行整理和分析,得到了在深基坑开挖过程中支护桩水平位移、支护桩竖向位移、冠梁水平位移以及周边建筑物竖向位移的变化规律; (3)介绍了有限单元法的基本思想,运用有限元软件ADINA对基坑开挖进行了数值模拟,得到了各工况条件下支护桩的变形和内力。将实测数据与模拟数据进行对比分析,并对二者产生差别的原因进行了具体的分析。得到了基坑支护结构设计中应注意的关键部位,为支护结构的设计提供了参考依据。
[Abstract]:With the increasing of the height of urban buildings, the excavation depth of foundation increases, thus a large number of foundation pit works appear. Because of the complexity of foundation pit engineering, the calculation theory of foundation pit deformation is not mature enough, so the study of foundation pit deformation law is of great practical significance. Based on the foundation pit engineering of Fuxin Xinya International Hotel, combined with theoretical analysis, field monitoring and numerical simulation, the deformation of foundation pit support structure is studied deeply in this paper, including the following aspects: 1) the basic types of foundation pit support are summarized, the design theory of supporting structure for foundation pit engineering at home and abroad, the calculation method of foundation pit deformation are summarized, and the applicable scope and economy of supporting structure system are expounded. The calculation theory of pile-anchor supporting structure system is introduced in detail. In combination with the foundation pit engineering of Fuxin Xinya International Hotel, the data obtained in the field monitoring process are sorted out and analyzed, and the horizontal displacement and vertical displacement of the supporting pile during the excavation of the deep foundation pit are obtained. The variation law of horizontal displacement of crown beam and vertical displacement of surrounding buildings; In this paper, the basic idea of finite element method is introduced, and the numerical simulation of foundation pit excavation is carried out by using finite element software ADINA, and the deformation and internal force of supporting pile under various working conditions are obtained. This paper compares the measured data with the simulated data, and analyzes the causes of the difference. The key points in the design of supporting structure of foundation pit are obtained, which provides a reference for the design of supporting structure.
【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】:TU433
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