Experimental Study on the Formation and Characteristics of Mud Filtration Cake in Large-Diameter Slurry Shield Tunneling

Table 3

Two-dimensional porosities of 27 samples of mud filtration cake.

Number	S1	S2	S3	S4	S5	S6	S7	S8	S9
D1	0.431	0.549	0.400	0.451	0.482	0.618	0.487	0.538	0.519
D2	0.500	0.502	0.459	0.497	0.458	0.520	0.645	0.397	0.491
D3	0.496	0.467	0.428	0.428	0.519	0.530	0.665	0.542	0.493