深基坑变形监测体系研究及工程应用
发布时间：2018-11-12 13:34
【摘要】：随着现代城市高层建筑的不断发展,基坑的规模不仅越来越大,而且越来越深,这就对安全施工提出了极大的挑战,因此基坑施工的同时,就需要选择适当的基坑变形监测体系,使国际上专家学者对深基坑变形监测体系研究越来越关注。但是我国在深基坑方面的研究相对较晚,直到1999年我们才召开了第一次专门的深基坑研究领域的会议,不仅理论研究相对落后于实践,并且我国没有丰富的工程实践,而且在施工管理和经验上也很缺乏,因此在深基坑工程施工期间造成的工程事故率远远高于发达国家。因此,本文通过查阅大量的有关资料文章,对上述这样的基坑工程在基坑变形监测体系研究上从以下方面开始着手： 首先介绍了基坑变形所涉及到的岩土变形理论以及地下水对岩体变形的机理,论述了基坑在开挖过程中的几个变形形式,一是在基坑刚刚开挖时,基坑底会弹性隆起,基坑底中间有最大的隆起；二是随着基坑开挖的不断加深基坑周围的地表竖直沉降变大；三是在基坑开挖过程中加固结构的水平位移和竖直沉降量也变大。 本文接着分析了深基坑的监测布置体系,比较详细的讲述了基坑监测体系布置时的规定、监测内容如何确定以及使用哪些监测仪器和每种监测仪器使用的监测方法的筛选。由于监测数据量大而且性质多样,所以选择合理的监测数据的处理方法尤为重要,如误差分析和平差原理等。最后采取数学的方法对监测数据进行归纳作图,最终确定各个监测内容的警戒值。 在论文的最后,结合大连恒隆广场基坑开挖项目具体分析了整个监测体系的实施过程。通过上述理论操作方法,首先对基坑的某几断面进行了ANSYS数值模拟分析,通过ANSYS分析模型的计算结果与在施工期间的监测结果相比较,变形结果一致,不仅评估了此基坑工程在施工过程中的安全隐患,而且在施工的同时及时指导基坑工程安全施工和预防工程事故的发生。
[Abstract]:With the continuous development of high-rise buildings in modern cities, the scale of foundation pit is not only becoming larger and deeper, which poses a great challenge to the safe construction, so the foundation pit construction at the same time, It is necessary to select appropriate foundation pit deformation monitoring system, which makes the international experts and scholars pay more and more attention to the deep foundation pit deformation monitoring system. However, the research on deep foundation pit in our country is relatively late. Until 1999, we did not hold the first special conference on deep foundation pit research, which not only lagged behind practice, but also did not have rich engineering practice in our country. Because of the lack of construction management and experience, the accident rate during the construction of deep foundation pit is much higher than that in developed countries. Therefore, by consulting a large number of relevant information articles, The research on the foundation pit deformation monitoring system for the above mentioned foundation pit works starts from the following aspects: firstly, the theory of rock and soil deformation involved in foundation pit deformation and the mechanism of groundwater deformation to rock mass are introduced. Several deformation forms of foundation pit during excavation are discussed. One is that when the foundation pit is just excavated, the bottom of the foundation pit will be raised elastically, and there is the largest uplift in the middle of the bottom of the foundation pit. The second is that the vertical settlement of the ground around the foundation pit becomes larger with the deepening of the excavation, and the horizontal displacement and the vertical settlement of the strengthened structure also become larger during the excavation of the foundation pit. This paper then analyzes the monitoring and layout system of deep foundation pit, describes in detail the provisions of the foundation pit monitoring system arrangement, how to determine the monitoring content and which monitoring instruments to use and how to screen the monitoring methods used by each monitoring instrument. Because of the large amount of monitoring data and diverse nature, it is very important to choose a reasonable method to deal with the monitoring data, such as error analysis and differential principle. Finally, the monitoring data are summed up and mapped by mathematical method, and the warning values of each monitoring content are finally determined. At the end of the paper, the implementation process of the whole monitoring system is analyzed with the foundation pit excavation project of Dalian Henglong Square. Through the above theory and operation method, the ANSYS numerical simulation analysis of some sections of foundation pit is carried out, and the calculated results of the ANSYS analysis model are compared with the monitoring results during construction, and the deformation results are consistent. This paper not only evaluates the hidden danger of the foundation pit in the construction process, but also guides the safe construction of the foundation pit and the prevention of the accident.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU473.2
[Abstract]:With the continuous development of high-rise buildings in modern cities, the scale of foundation pit is not only becoming larger and deeper, which poses a great challenge to the safe construction, so the foundation pit construction at the same time, It is necessary to select appropriate foundation pit deformation monitoring system, which makes the international experts and scholars pay more and more attention to the deep foundation pit deformation monitoring system. However, the research on deep foundation pit in our country is relatively late. Until 1999, we did not hold the first special conference on deep foundation pit research, which not only lagged behind practice, but also did not have rich engineering practice in our country. Because of the lack of construction management and experience, the accident rate during the construction of deep foundation pit is much higher than that in developed countries. Therefore, by consulting a large number of relevant information articles, The research on the foundation pit deformation monitoring system for the above mentioned foundation pit works starts from the following aspects: firstly, the theory of rock and soil deformation involved in foundation pit deformation and the mechanism of groundwater deformation to rock mass are introduced. Several deformation forms of foundation pit during excavation are discussed. One is that when the foundation pit is just excavated, the bottom of the foundation pit will be raised elastically, and there is the largest uplift in the middle of the bottom of the foundation pit. The second is that the vertical settlement of the ground around the foundation pit becomes larger with the deepening of the excavation, and the horizontal displacement and the vertical settlement of the strengthened structure also become larger during the excavation of the foundation pit. This paper then analyzes the monitoring and layout system of deep foundation pit, describes in detail the provisions of the foundation pit monitoring system arrangement, how to determine the monitoring content and which monitoring instruments to use and how to screen the monitoring methods used by each monitoring instrument. Because of the large amount of monitoring data and diverse nature, it is very important to choose a reasonable method to deal with the monitoring data, such as error analysis and differential principle. Finally, the monitoring data are summed up and mapped by mathematical method, and the warning values of each monitoring content are finally determined. At the end of the paper, the implementation process of the whole monitoring system is analyzed with the foundation pit excavation project of Dalian Henglong Square. Through the above theory and operation method, the ANSYS numerical simulation analysis of some sections of foundation pit is carried out, and the calculated results of the ANSYS analysis model are compared with the monitoring results during construction, and the deformation results are consistent. This paper not only evaluates the hidden danger of the foundation pit in the construction process, but also guides the safe construction of the foundation pit and the prevention of the accident.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU473.2
【参考文献】
相关期刊论文 前10条
1 王正晓,刘保信,张晓春,耿玉\，
本文编号：2327265
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