The Study On The Displacement Monitoring And Numerical Simulating Of A Deep Foundation In Kunming

In the city construction,with a large number of high buildings,underground Plaza and underground leisure facilities,underground car parks and a lot of underground space development and construction,a great amount of deep Foundation pit engineering have emerged in the city.Most of these Foundation has the same characteristics: the complex structure of Foundation pit support in difficult,serious consequences after the devastation.Therefore,these deep excavation and supporting engineering and technical personnel requirements are very high.It has made the engineering of Foundation pit supporting technology become an important research topic in contemporary construction.A sewage treatment plant of Kunming deep foundation pit project is located in Guandu District of Kunming City,application of waterproof curtain and pile anchor combination support,due to the existence of some soft soil in the pit,engineering geological conditions become more complex,belonging to the middle of complex lots.In this paper,taking deep foundation pit engineering as an example,has systematically collected geological and design data of the foundation pit project,according to the engineering geological and hydrogeological conditions of the pit,and analyzes the foundation pile anchor retaining mechanism and mechanical properties;According to the design and construction plan,the foundation pit monitoring program is developed,which mainly monitors the displacement of the anchor pile and the axial force of the cable.The monitoring and analysis data are collected and analyzed.The simulation and retaining structure of the foundation pit excavation are carried out by using the deep foundation pit software Computational stability;at the same time,using the finite element software for geotechnical engineering PLAXIS,analyzed the mechanical characters of the retaining pile and maked the second simulation calculation;finally,compared with field monitoring data analysis simulation results of Lizheng deep foundation pit software and PLAXIS software,it was found that the three results were almost the same;it was found that there were some differences between the soft interlayer and the actual working condition,which showed that the software had some limitations when used in soft soil interlayer.The results of this study provide a reference for future similar pit engineering design and construction.