廣州地鐵指揮中心基坑圍護結構設計及變形控制研究
[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.
【學位授予單位】:石家莊鐵道大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TU753
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