Grouting Mechanism of Cement-Based Slurry in a Concentric Annulus under High Groundwater Pressure

Table 1

Parameters adopted for the generation of the calculation and numerical simulation.

Parameters	Flow rate control injection mode		Pressure control injection mode
	CSG	CG	CSG	CG
Radius of the outer cylinder, Ro	0.10 m	0.10 m	0.10 m	0.10 m
Radius of the inner cylinder, Ri	0.07 m	0.07 m	0. 07 m	0.07 m
Grouting overpressure, p	—	—	10 kPa	10 kPa
Grouting rate, q	0.00125 m^3/s	0.00125 m^3/s	—	—
Initial groundwater pressure, pw	5 MPa	5 MPa	5 MPa	5 MPa
Total injection time, T	60 s	60 s	60 s	60 s
Slurry viscosity function of chemical reaction time,	= 0.003182 t^2.23 + 0.04 Pa·s	0.04 Pa·s	= 0.003182 t^2.23 + 0.04 Pa·s	0.04 Pa·s
Time step	0.05 s	0.05 s	0.05 s	0.05 s