Ground Settlement of High-Permeability Sand Layer Induced by Shield Tunneling: A Case Study under the Guidance of DBN

Table 5

Summary of sensitivity coefficient.

Influence factors	Correlation coefficient
Soil pressure	0.4625
Jack thrust	0.8550
Cutter head torque	0.8250
Tunneling speed	0.8550
Grouting volume	0.5200
Grouting pressure	0.4725
Permeability coefficient	0.8450
Slurry density	0.4825