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

Table 9

Comparison of the deformation modulus before and after grouting.

Before/after grouting	Deformation modulus range (GPa)	Average minimum (GPa)	Average maximum (GPa)	Average deformation modulus (GPa)	Statistical points
Before	5.50~13.42	7.46	9.9	8.56	75
After	5.73~13.26	7.69	10.41	8.71	48