Analytical Calculation of Critical Anchoring Length of Steel Bar and GFRP Antifloating Anchors in Rock Foundation

Table 1

Calculating parameters and anchoring length of steel anchors.

Anchor test source	r0 (mm)	μs	Esa (GPa)	Es (MPa)	Test anchoring length (m)	Theoretical critical anchoring length (m)
[21]	8	0.3	200	3 × 10^4	0.15	0.100
[22]	15	0.5	200	5.43 × 10^4	0.8	0.149
[23]	14	0.33	200	30	3	5.589