基坑维护结构的监控分析研究

发布时间：2018-09-17 06:42

【摘要】：本文的主要研究内容是对深基坑的支护工程进行监测，并对监测结果进行了评价和分析，首先是以沈阳四环路上跨浑河的动漫桥基坑工程为依托，结合其具体的围护结构的特点，制定了具体的监测方案；之后对讨论了支护工程中的预警系统，并深入地分析了监测所得了全部数据。对数据的处理和分析过程之中，主要运用了灰色理论的相关原理，并对实际问题进行抽象概括得出了适用于本围护结构的GM(1,1)预测模型，最后则运用本模型对整个工程的监测数据进行了处理和验证。本文的主要工作主要如下： 1、根据监测目标，选用相对较高的精密仪器，结合先进的测量方法，对围护结构进行了实地检测。在监测桩顶的水平位移之时选用了比较常用同时也是发展比较成熟的导线测量方法；在监测锚索内力时，由于需要对锚索中的应变情况作比较精密的观测，我们按照电磁学中单臂电桥的原理制备了专门的仪器用于测量锚索内力，并获得了比较满意的结果。 2、由于周围环境处于时刻变化之中，所以要根据实时情况对监测数据进行分析处理；然后再根据分析结果和预测制定相应的预警方案。我们对支护结构的受力情况进行了详细的理论模拟和数据分析，进而对其稳定性进行了评估。结果表明，本文所定的监测方案及预警方案是切实可靠的，监测结果和预警结果是可信的。 3、最后简单介绍了灰色理论的基本原理，并重点讨论了该理论在本工程中的应用问题。结合本工程的实际，我们建立了针对本工程的理论模型，即GM(1,1)模型。我们用该模型对围护结构中的形变和应力进行了讨论和预测，并分析了预测结果，结果表明，该模型是成功的，，可以很好地对该工程起到预测效果。
[Abstract]:The main research content of this paper is to monitor the support engineering of deep foundation pit, and evaluate and analyze the monitoring result. Firstly, it is based on the foundation pit engineering of animation bridge across Hunhe River on Shenyang fourth Ring Road. Combined with the characteristics of the concrete retaining structure, the concrete monitoring scheme is established, and then the early warning system in the support engineering is discussed, and all the data obtained from the monitoring are analyzed deeply. In the process of data processing and analysis, the relevant principles of grey theory are mainly used, and the practical problems are abstractly summarized. The GM (1K1) prediction model suitable for this enclosure structure is obtained. Finally, the monitoring data of the whole project are processed and verified by this model. The main work of this paper is as follows: 1. According to the monitoring target, select the relatively high precision instrument, combined with the advanced measurement method, carried on the field inspection to the envelope structure. In order to monitor the horizontal displacement of the pile top, a more common and mature traverse measuring method has been chosen, and when monitoring the internal force of the anchor cable, it is necessary to make a more precise observation of the strain in the anchor cable. According to the principle of single arm bridge in electromagnetism, we have prepared a special instrument to measure the internal force of anchor cable. 2. Therefore, the monitoring data should be analyzed and processed according to the real time situation, and then the corresponding early warning scheme should be established according to the analysis result and forecast. The theoretical simulation and data analysis are carried out to evaluate the stability of the supporting structure. The results show that the monitoring scheme and early warning scheme are reliable, and the monitoring results and early warning results are credible. Finally, the basic principle of grey theory is briefly introduced. The application of this theory in this project is discussed in detail. According to the practice of this project, we have established a theoretical model for this project, that is, GM (1K1) model. We use the model to discuss and predict the deformation and stress in the envelope structure and analyze the prediction results. The results show that the model is successful and can be used to predict the engineering.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TU753

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