Analysis of Impact of Shield Tunneling Parameters on Ground Settlement Based on Pearson Correlation Coefficient Method
To study the influence of shield tunneling parameters on surface subsidence,combined with the field monitoring results of a shield project on Beijing Metro Line 19,the Pearson correlation coefficient method is used to analyze the correlation of linear regression of the influence of shield tunneling parameters on surface subsidence,and the significance level of linear correlation is tested.The fluctuation range of shield tunneling parameters and the law of surface subsidence are statistically analyzed,and then the fine control of surface subsidence is realized by controlling parameters.The results demonstrated the reliable application of the Pearson correlation coefficient method in this project.The two key control parameters affecting surface subsidence are synchronous grouting amount and soil pressure,and their correlation coefficients are 0.52 and 0.41,respectively.Other parameters are weakly correlated with surface subsidence.The tunneling parameters of the right line shield are more finely controlled than those of the left line.The optimal parameter control range is the average 95%confidence interval.Finally,the surface subsidence above the right line is greatly reduced compared with the left line,and it is stable within 6mm.Hence,a good settlement control effect has been achieved through fine parameter control.
万方数据
维普
