Case Study: In Situ Experimental Investigation on Overburden Consolidation Grouting for Columnar Jointed Basalt Dam Foundation

Table 7

Consolidation grouting results of the #25 dam section.

Hole	Number of holes	Grouting penetration (m)	Cement injection (kg)	Unit injection (kg/m)	Average permeability (LU)	Note
І	56	140.9	13799.2	97.94	/	5 m protective layer
II	97	270.1	4204.9	15.57	/
III	40	127	70.2	0.55	/
Total	193	538	18074.3	33.6	/
І	59	1475	122658.5	83.16	23.24	25 m bedrock
II	101	2525	79721.8	31.57	9.05
III	43	1075	13890.54	12.92	3.84
Total	203	5075	216270.84	42.61	11.41