Soil Improvement of EPBS Construction in High Water Pressure and High Permeability Sand Stratum

Table 2

Sodium bentonite-CMC mixed mud ratio scheme.

Scheme 1	CMC concentration (‰)	Sodium bentonite-mixed mud concentration	Scheme 2	CMC concentration (‰)	Sodium bentonite-mixed mud concentration
1-1	1	1 : 10	2-1	1	1 : 8
1-2	2.5		2-2	2.5
1-3	5		2-3	5
1-4	7.5		2-4	7.5
1-5	10		2-5	10