Comparison of tunneling impacts on piles when protected by different jet grouting patterns

Abstract

The impact of ground movement due to tunneling to nearby piles which are the induced axial force, moment and 3D deflection in piles are investigated in this study. A number of jet grouting patterns were assumed and analyzed by a finite element code for comparing their efficiency on the reduction of tunneling impacts. The analysis results reveal that the jet grouting was effective for reducing the axial force, moment and deflection in piles in different modelled depending on the grouting pattern. The grouting pattern of wall line had a better effect on the axial force and vertical settlement than the pattern of block about 0.44% and 0.04% respectively. On the other hand, the grouting pattern of block got a better efficient on bending moment.