Monitoring Analysis And Deformation Prediction Of A Deep Foundation Pit Project In Guangzhou

Deep foundation pit engineering monitoring and deformation prediction are essential to ensure smooth construction and have become one of the important research topics in geotechnical engineering.This paper combines the actual case of a deep foundation pit project in Guangzhou,Actual monitoring data according to foundation pit engineering,rediction of deformation trend of foundation pit by statistical analysis and numerical analysis,this provides technical support and data support for the safe construction of foundation pits,it is of great significance to the design and construction of deep foundation pits,it can effectively ensure deformation safety and normal use requirements during foundation pit construction,The paper mainly carried out the following work:(1)Based on the example of deep foundation pit engineering in this paper,the data processing analysis of the deformation monitoring results of foundation pit engineering is carried out,and the stability of foundation pit engineering is judged according to the change law of monitoring data.The analysis results show that the monitoring values of each monitoring item are all Within the control range,the foundation pit support structure is in a relatively stable state during the foundation pit excavation construction,which provides a guarantee for the safe construction of the foundation pit.The foundation pit is always in a safe state during excavation.(2)Using time series analysis in statistical analysis,grey prediction model,regression analysis,fitting prediction of the deformation trend of the surrounding surface settlement of the foundation pit in this paper,compare predicted values with actual monitoring data,the comparison results show that the three statistical analysis methods can better predict the monitoring data within their respective scopes,it provides a reference for deformation control during excavation construction of similar foundation pit engineering.(3)Because the previous three statistical prediction methods need to obtain the actual deformation monitoring data of the foundation pit to predict the deformation,and the design of the foundation pit deformation monitoring scheme needs to know the deformation of the whole pit in advance,so use MIDAS GTS NX The numerical simulation software simulates the construction process of the foundation pit engineering,establishes the finite element model,predicts the problems that may occur during the excavation before the construction,and finds the problems in advance to take measures to make the project reasonable and economical.The deformation of the foundation pit is analyzed,and the simulation results are compared with the actual monitoring values.It is found that the predicted deformation trend of each structure of the foundation pit is basically consistent with the deformation trend obtained by the actual deformation monitoring,and the accuracy of the numerical simulation and the measured data are verified reliability.