灰色理论视角下土质边坡位移监测的研究应用

发布时间：2018-04-14 04:08

本文选题：灰色理论 + 土质边坡　；参考：《浙江海洋大学》2017年硕士论文

【摘要】：边坡系统和灰色系统都同属于一个灰色范畴,所以本文主要采用灰色系统理论来研究土质边坡位移监测的相关问题。论文从理论基础、建模步骤和计算方法三个方面详细的介绍了灰色系统理论中的两大核心内容:GM(1,1)模型和灰色关联度分析法。查阅大量相关文献后,针对它们应用于边坡工程的不足之处,对其进行了相应的改进。将位于浙江省的杭新景高速公路土质边坡位移监测数据作为初始数据。首先利用线性插值的方法对误差较大的监测数据进行处理,然后分别将地表位移数据和深部位移数据看作初始数据,分别建立两类灰色模型进行预测,一种是传统的GM(1,1)模型;一种是不断剔除旧数据然后加入新数据形成的新陈代谢模型。分析比较这两种模型在短期和中长期预测中预测不同类型位移的精度情况。将浙江省杭新景高速公路路段中5个已经有明确研究结论并且已获得具体物理力学参数的边坡作为依据,分别采用灰色关联度分析法和改进后形成的灰色关联投影法对这些边坡进行稳定性分析,研究它们之间稳定性的相对大小关系;将能反映该项目所处地区典型地质情况的边坡相关参数作为基本数据,然后利用灰色关联度分析法分析影响边坡稳定性的敏感因子的重要性。研究结果表明:(1)在中期与长期预测中,进行了相关改进优化的新陈代谢模型取得了更高的预测精度,预测的结果更加接近于实际的监测值。(2)利用灰色关联投影法对多个待测边坡进行稳定性分析,得到的稳定程度大小与通过极限平衡法计算得到的安全系数完全对应,证明了此方法在实际工程中完全可行。(3)利用灰色关联度分析法对边坡敏感因子进行重要程度排序,其结果与专家分析后得到的结论完全一致,能为实际工程提供帮助。
[Abstract]:Both the slope system and the grey system belong to the same grey category, so the grey system theory is mainly used to study the problems related to the displacement monitoring of the soil slope.In this paper, the two core contents of grey system theory, namely: GM-1) model and grey relational degree analysis method, are introduced in detail from three aspects: theoretical basis, modeling steps and calculation methods.After consulting a large number of related documents, the corresponding improvements are made to the shortcomings of their application in slope engineering.The soil slope displacement monitoring data of Hangzhou Xinjing Expressway in Zhejiang Province are taken as initial data.Firstly, the method of linear interpolation is used to deal with the monitoring data with large error, then the surface displacement data and the deep displacement data are regarded as the initial data respectively, and two kinds of grey models are established for prediction, one is the traditional GM-1) model.One is a metabolic model that constantly removes old data and adds new data.The accuracy of the two models in predicting different types of displacements in short term and long term prediction is analyzed and compared.On the basis of five of the sections of Hangzhou Xinjing Expressway in Zhejiang Province, which have clear research conclusions and have obtained specific physical and mechanical parameters,The stability of these slopes is analyzed by the grey correlation degree analysis method and the improved grey correlation projection method, and the relative relation of the stability between them is studied.Taking the relevant parameters of slope which can reflect the typical geological conditions of the area in which the project is located as the basic data, the importance of the sensitive factors affecting the stability of the slope is analyzed by using the grey correlation degree analysis method.The results show that in the medium and long term prediction, the metabolic model, which has been improved and optimized, has achieved higher prediction accuracy.The predicted results are closer to the actual monitoring value. (2) the grey correlation projection method is used to analyze the stability of many slopes to be tested, and the degree of stability obtained corresponds to the safety factor calculated by the limit equilibrium method.It is proved that this method is feasible in practical engineering. The grey correlation degree analysis method is used to rank the important degree of slope sensitivity factors. The results are consistent with the conclusions of expert analysis and can be helpful for practical engineering.
【学位授予单位】：浙江海洋大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.14

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