Research On Construction Information Monitoring And Finite Element Analysis For Anchorage Foundation Of Humen Second Bridge

With the rapid development of China's economy,the underground engineering and high-rise buildings are developing rapidlywith the traffic construction in the cities,which need to take up the larger and larger space and the more and moredeep foundation pit engineering with the basic treatment.The condition of deep foundation pit constructionsis often very poor,which is facing huge security risks.It is one of the most effective means that the application of information construction is used to monitor the safety of the pit construction and control the surrounding structural deformation.They can timely grasp the displacement,deformation and stress situation of the envelopeand thechanges of the surrounding pit,so that we can ensure thatthe safety of excavation and structure of foundation pit.This paper introduces the basic principle of finite element method,and applies it to Humen second bridge anchor ingot super deep foundation pit to even the wall construction information monitoring work.Based on the study and analysis of the geological data and the design documents of the wall and the wall,the finite element analysis model of the project is established,and the deformation and stress level of the ground wall under different working conditions are predicted analysis.Based on the results of forecasting analysis,the paper puts forward the corresponding implementation plan of the corresponding information monitoring system,including the analysis and discussion of the data acquisition method of millimeter level plane displacement,the setting of monitoring project and monitoring point,the setting of monitoring frequency and warning value,how to monitor the construction site,point protection and other technical means.In the implementation of information technology monitoring process,the relevant monitoring formautomatically generated to guide the construction of the projectbythe data entry and manual inspection.Through the statistical analysis of a large number of monitoring data,the changes of the monitoring project with the progress of the construction are shown in the form of the curve.The temporal and spatial changes of the wall and the surrounding environment are displayed intuitively to achieve the purpose of informatization monitoring.On the one hand,by the comparison and analysis the finite element prediction data and the measured data,the mechanism of the deformation of the wall is explained.On the other hand,the model parameters can be analyzed and adjusted to accumulate the engineering experience.In this paper,the finite element model forecasting monitoring program proposed in the specific project implemented of monitoring work and formed a closed loop with a large number of data collected model.The finite element model and information monitoring with the use of each other have a corresponding guiding significanceto protect the safety of deep foundation pit works.