Influence of Segmented Linings on the Micro-Pressure Wave of Tunnels

Table 3

The maximum pressure gradient and micro-pressure wave.

The position of the linings	Without linings	Entrance of the tunnel	Middle of the tunnel	Exit of the tunnel
(∂P/∂t)max at T1 (kPa/s)	10.49	12.06	10.43	11.20
MPW at M1 (Pa)	86.31	97.97	85.89	85.26
MPW at M3 (Pa)	37.05	42.00	36.92	35.05