Research on Subgrade Differential Settlement Control Standard and Treatment Technology Based on Driving Comfort

Table 5

Finite element calculation method for vertical and horizontal cut to fill location.

Calculation type	Horizontal cut to fill location scheme	Longitudinal cut to fill location scheme
Different grid laying positions	Calculate the deformation distribution of the subgrade under the four conditions of unlayed grid and grid arrangement range at 0∼H/3, H/3∼2H/3, and 2H/3∼H (H is the subgrade height), and the vertical spacing of adjacent grids is 1 m
Different grid laying densities	Calculate the distribution of subgrade deformation under the six working conditions of adjacent grid laying intervals of 0.5 m, 1 m, 1.5 m, 2 m, 2.5 m, and 3 m
Different grid laying lengths	Calculate the distribution of subgrade deformation under the four conditions of the length ratio of the grid on the step to the outside of the step: 1 : 1, 1 : 2, 1 : 3, and 1 : 4, and the maximum length of the grid is 10 m	Calculate the distribution of subgrade deformation under the three conditions of the length ratio between inside and outside of transition zone: 1 : 0.5, 1 : 1, and 1 : 2, and the maximum length of the grid is 23 m
	A layer of geogrid is arranged on the top surface of the upper and lower roadbeds, and a layer of grid is arranged every 1 m from the bottom surface of the lower bed to the 5 m depth of the subgrade, and then change the spacing of the downward grid to 2 m