Assessing the Relative Quality of Rock Bolt Grouting in Weak Rock Mass Based on In Situ and Numerical Pull-Out Tests

• Published in: Rock mechanics and rock engineering Vol. 58; no. 9; pp. 10497 - 10522
• Main Authors: Thirukumaran, Sivanathan, Oliveira, David, Ariza, Leo
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01.09.2025; Springer Nature B.V
• Subjects: Acceptance criteria; Anchor bolts; Bonding strength; Boring machines; Civil Engineering; Earth and Environmental Science; Earth Sciences; Fixtures; Geophysics/Geodesy; Grout; Grouting; Interfaces; Interfacial properties; Investigations; Laboratories; Lifting; Load transfer; Original Paper; Pull out tests; Rock; Rock bolts; Rock masses; Rocks; Sensitivity analysis; Shear; Shear stiffness; Shear strength; Strain gauges; Tensile stress; Weak rock; Grouting; In situ pull-out test; Numerical modelling; In-tunnel anchorage; Rock bolt

Grouted rock bolts anchor various in-tunnel fixtures, such as jet fans, TBM launch frames, heavy-lifting pullies or chain blocks, and abutment and corbel supports. In such applications, rock bolts are mainly subject to direct axial tensile loads rather than combined axial shear as and when working a...