Supporting Design And Monitoring Analysis Of Deep Foundation Pit Of A Transportation Hub Complex

With urban construction entering a new stage,urban infrastructure construction has entered a new stage.More and more large-scale projects appear in the city,which provides more opportunities for the development of the city and more convenience for the life of the urban people.The construction of large-scale projects needs more advanced technical support.The construction of large-scale projects has also brought more deep foundation pit projects.There are many factors that need to be considered in the construction of deep foundation pit engineering,and the construction is also difficult.The design,construction and monitoring of deep foundation pit engineering are the key research contents.This paper chooses a deep foundation pit project of an transportation hub complex in southeastern coastal city for research.Firstly,the general situation of the project is described,including engineering geology,hydrological data,topography and landform,and surrounding environment.Combining with the actual situation on the spot and adapting measures to local conditions,this paper introduces several commonly used deep foundation pit supporting structures,focusing on the comparison between the row pile supporting structure and the ground wall combined with the internal supporting structure,and reasonably chooses the supporting scheme.Then,the design and calculation of deep foundation pit are carried out by using Lizheng deep foundation pit calculation software combined with field engineering data,and its stability is checked to ensure the safety of deep foundation pit engineering.Then two key construction technologies,diaphragm wall and steel structure support of assembled pre-stressed fish-web girder,are introduced.Secondly,because of the large excavation area,deep excavation depth and complex supporting structure system of the project,the monitoring scheme of the deep foundation pit project is put forward according to these actual conditions,and then the monitoring data obtained from the field monitoring are processed and analyzed.The monitoring results show that the foundation pit has been in a safe and stable state.Secondly,the numerical simulation of foundation pit is carried out by using Midas GTS NX finite element analysis software.The simulation results of surface settlement,horizontal displacement of diaphragm wall and monitoring values are compared and analyzed respectively.The results show that the monitoring values are in good agreement with the simulation values,which verifies the correctness of the foundation pit model and the accuracy of the monitoring data of foundation pit.Finally,based on the actual situation of this project,several suggestions are summarized,and the shortcomings are prospected,hoping to be helpful for similar deep foundation pit projects in the future.Figure 67 table 11 reference 55...