| The21st century is "underground space" century, the era of rapid development for urbanexcavetion engineering. The excavetion engineering of various categories and scale can beseen everywhere, and it has been an effective way to relieve the pressure of urban floor space.However the environment around urban excavetion engineering is very complex, whichmakes the constrution extremely difficult, and easily causes serious engineering accidents anddamages for the country and people. The Futian Station of Guangzhou-Shenzhen-Hong KongPassenger Line is located in Shenzhen CBD area, and its safety has always been on the firstplace in the constrution process.Firstly, this paper introduces the status of the excavation, bracing and retaining structureand excavation monitoring at home and abroad, and describes the monitoring system ofFutian Station excavation in detail. According to analysis the measured data of the bracingand retaining structure of typical monitoring sections of this project, this paper studies thedisplacement and axial force features of the bracing and retaining structure and the stability ofthe deep excavation during the construction process.Secondly, this paper uses three curve fitting model to fit and predict the part of measureddata and compares the results with experimental results. It verifies the reliability of the fittingmodel and provides an effective method for the dynamic control of exvacation deformationand force.Finally, this paper establishes the three-dimensional finite element model of FutianStation E Zone and calculates its displacement and axial force of bracing and retainingstructure. It compares the results with experimental results and verifies the reliability of themodel parameters. By adjusting the parameters of steel support, this article studies the displacement and axial porce changes of bracing and retaining structure, and provides somereference for the design and construction optimization of deep exvacation. |
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