广州地铁指挥中心基坑围护结构设计及变形控制研究

发布时间：2019-05-27 11:07

【摘要】：本文对广州地铁指挥中心基坑围护结构设计及位移控制进行了研究,通过对研究背景、意义及国内外研究现状的比较分析,有针对性的对广州地铁指挥中心基坑围护结构设计及位移控制进行了相关的分析研究,具体有基坑变形机理及影响因素的分析、基坑围护结构设计的比较、基坑位移监测及控制等得出了以下结论:(1)关于基坑变形的因素多种多样,但其中起到主要作用的有地质条件、水文条件、土压力、基坑设计条件、基坑的规模、基坑的施工条件以及基坑的渗流状态等,于此同时上述各因素也是导致基坑围护结构变形产生的因素,具体作用的过程较为复杂;(2)关于地表的沉降其会影响周围的建筑物同时它对周围建筑物的作用也有一定的规律性:当开挖较深的基坑时,在其周围会形成比较大的塑性区域,这时由于塑性流动的作用往往导致基坑外部的土体逐步开始向基坑内侧和基坑底部流动,这种流动会导致地表的沉降增加,最终导致周围建筑物的破坏;(3)基坑的破坏形式有不同的形式,但产生不同破坏模式归其原因往往均是由于基坑的不同埋置深度所导致的;(4)在进行基坑围护施工前,要对基坑的工程的概况及工程环境、基坑围护设计原则、基坑围护结构设计方案、基坑围护结构施工方案等进行仔细的计算验证;(5)关于基坑监测新技术如神经网络预测、计算机技术、自动化技术、摄影技术、光学声波、电磁声测技术和遥感航测技术等的引进,不仅能快速、准确的进行基坑动态的实时监控还能大大的减少人力。
[Abstract]:This paper studies the design and displacement control of the retaining structure of the foundation pit of the Guangzhou Metro Command Center, and through the comparative analysis of the research background, the significance and the research situation at home and abroad, The design and displacement control of the retaining structure of the foundation pit of the Guangzhou Metro Command Center are analyzed and studied. The analysis of the deformation mechanism of the foundation pit, the analysis of the influencing factors, the comparison of the design of the retaining structure of the foundation pit, the monitoring and control of the displacement of the foundation pit and the like are given. (1) The factors affecting the deformation of the foundation pit are various, but the main function is the geological conditions, the hydrological conditions, the earth pressure, the foundation pit design conditions, the scale of the foundation pit, the construction conditions of the foundation pit and the seepage state of the foundation pit, etc., At the same time, the above-mentioned factors are also the factors leading to the deformation of the retaining structure of the foundation pit, and the process of concrete action is more complicated; (2) the settlement of the surface can affect the surrounding buildings, and the effect on the surrounding buildings also has certain regularity: when the deep foundation pit is excavated, a relatively large plastic region is formed around the foundation pit, and at the same time, due to the action of plastic flow, the soil body outside the foundation pit is gradually started to flow to the inner side of the foundation pit and the bottom of the foundation pit, so that the settlement of the surface is increased, and the damage of the surrounding building is finally caused; (3) The failure form of the foundation pit has different forms, but the cause of different failure modes is often caused by the different embedment depth of the foundation pit; and (4) before the foundation pit enclosure construction is carried out, the general situation of the work of the foundation pit and the engineering environment and the design principle of the foundation pit are designed, the design scheme of the foundation pit retaining structure, the construction scheme of the foundation pit enclosing structure and the like are carefully calculated and verified; (5) the new technology for the foundation pit monitoring, such as the neural network prediction, the computer technology, the automation technology, the photographic technology, the optical sound wave, The introduction of electromagnetic sound measurement technology and remote sensing aerial survey technology can not only rapidly and accurately carry out the real-time monitoring of the foundation pit's dynamic, but also can greatly reduce the manpower.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU753

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