Grout anchor bolts are a common type of anchor bolt used in railway tunnels. Construction generally involves first drilling holes in surrounding rock, injecting cement mortar, and inserting steel bars. The bolt body forms a bond with the surrounding rock via mortar. Grout anchor bolts work in conjunction with shotcrete and steel mesh for integrated support.
| Diameter | Length |
| 20mm | 2.0 m ～ 4.5 m |
| 22mm | 2.0 m ～ 4.5 m |
| 25mm | 2.0 m ～ 4.5 m |
| 32mm | 2.0 m ～ 4.5 m |
To guarantee quality, high-strength threaded steel bars are adopted for steel bolt bodies.
Threads on one end of the bolt body are formed by thread rolling, delivering high thread precision.
Reinforce surrounding rock
Restrain surrounding rock deformation
Improve shear resistance of fracture surfaces
Solid steel anchor bolts are widely used for bolt support, representing a proven geotechnical engineering technology.
Solid steel anchor bolts with a diameter of 32 mm are adopted to achieve effective reinforcement.
As part of the bolt support scheme, solid steel anchor bolts can effectively address post-construction tunnel defects of this kind.
