Pullout Test on Fully Grouted Bolt Sheathed by Different Length of Segmented Steel Tubes

Figure 1

Comparison between axial stress and shear stress distribution along a rock bolt in pullout test and in situ. (a) Distribution patterns for axial stress and interfacial shear stress of rock bolt under pullout test (after Hawkes and Evans [14]); (b) distribution of axial stress and interfacial shear stress for rock bolt in situ (adapted from Farmer’s work [7]).

(a)

(b)