基于MIC的地铁施工地表和建筑物沉降关联分析

发布时间：2018-01-12 08:08

本文关键词：基于MIC的地铁施工地表和建筑物沉降关联分析　出处：《华中科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：21世纪中国城市化步伐进一步加快，大量的人口涌入城市，人员和物资交流频繁，城市交通面临着严峻的考验。因此，为了解决这一困局，城市地铁工程迅猛发展。地铁工程建设由于在地下施工，会经过不同的地质条件，工程规模也较庞大，且施工过程长，建设中存在很多风险隐患。沉降是安全风险监测的一个重要方面，因为沉降是地层稳定性的一个重要的指标。学者们对沉降做了大量的研究，主要集中在沉降的预测和影响的定性研究上。无法定量的描述影响大小和范围。本文首先明确了地表沉降和建筑物沉降的监测目标，阐明了地铁施工引起的地表沉降和建筑物沉降包括哪几方面。并对武汉地铁施工监测过程中的监测精度、监测频率和监测时间段以及如何进行监测点的布置进行了说明。根据地铁施工中地表沉降和建筑物沉降监测的特点用线性插值法进行数据预处理。通过比较Pearson系数、互信息和最大信息系数三种关联分析方法，选取最大信息系数（MIC）方法定量的对地表沉降和建筑物沉降的关联性进行分析。在进行了以上分析以后，，以武汉地铁施工工程江汉路站的地表沉降和建筑物沉降监测为背景，对地表沉降和建筑物沉降间的关联系数进行拟合分析和统计分析，得到了关联系数与对应距离的近似趋势拟合函数，分析地表沉降和建筑物沉降间关联关系随监测点间的距离的变化规律。通过统计分析，总结在不同的距离区间内地表沉降和建筑物沉降间关联性的大小，从而确定建筑物的重点监测区域。为地铁施工安全监测提供决策支持。
[Abstract]:In 21th century, the pace of urbanization in China further accelerated, a large number of people poured into the city, people and materials exchanged frequently, urban transportation is facing a severe test. Therefore, in order to solve this dilemma. Urban subway engineering develops rapidly. Due to underground construction, subway construction will go through different geological conditions, the project scale is also relatively large, and the construction process is long. There are many hidden risks in construction. Settlement is an important aspect of safety risk monitoring, because subsidence is an important index of stratum stability. Scholars have done a lot of research on settlement. It mainly focuses on the prediction of settlement and qualitative study of influence. It is impossible to quantitatively describe the magnitude and range of influence. In this paper, the monitoring objectives of surface settlement and building settlement are defined, and the ground subsidence and building settlement caused by subway construction are clarified. The monitoring accuracy of Wuhan subway construction monitoring process is also given. The monitoring frequency, monitoring time period and how to arrange monitoring points are explained. According to the characteristics of ground subsidence and building settlement monitoring in subway construction, the data preprocessing is carried out by linear interpolation method. Arson coefficient. Mutual information and maximum information coefficient are three kinds of correlation analysis methods, and the maximum information coefficient method is selected to quantitatively analyze the correlation between ground subsidence and building settlement. After the above analysis, the ground subsidence and building settlement monitoring of Jianghan Road Station of Wuhan Subway Construction Project are taken as the background. The fitting analysis and statistical analysis of the correlation coefficient between the surface settlement and the building settlement are carried out, and the approximate trend fitting function between the correlation coefficient and the corresponding distance is obtained. The relationship between ground subsidence and building settlement with the distance between monitoring points is analyzed. Through statistical analysis, the correlation between surface settlement and building settlement in different distances is summarized. Thus, the key monitoring area of the building is determined and decision support is provided for the safety monitoring of subway construction.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U231.3;TU196.2

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