Analysis of surface deformation characteristics in pipe jacking construction based on the theory of a stratum cross-correlation conditional random field

For the surface deformation problem caused by pipe jacking construction, a conditional random field (CRF) method based on Co-Kriging theory is used to establish a stochastic simulation method for soil parameters in a finite element model, considering the constraint effect of borehole data and the influence of the correlation of adjacent strata. Combined with the pipe jacking case, the statistical laws of soil parameters and surface defor-mation laws are analyzed and compared with the unconditional random field (URF) method to verify the reli-ability and applicability of the proposed method. The research results show that the stochastic simulation method can effectively characterize the spatial variability and autocorrelation of stratigraphic parameters and obtain the surface deformation law and deformation range caused by pipe jacking construction. The parameters generated by the proposed method have a higher correlation and smaller stochastic range. When using the method to analyze engineering problems, the stochastic curves obtained from the analysis are more concentrated, and the discrete range is smaller.