T103 hollow rock anchor bar

T103 hollow rock anchor bar is a type of large diameter anchor bolt, which has a larger diameter than other common sizes. It embodies drilling, grouting and anchoring as a whole. Its anchor bar can be cut and lengthened on request, applying to narrow spaces. It will increase the safety of tunnel portal and improve the stability of tunnel during the pipe shed construction. With the stabilization of micro piles, this hollow rock anchor bar can decrease the influence of settlement action to buildings and reinforce the foundation effectively. It is widely used as an efficient anchoring means, in tunnel pre-support, slope stabilization, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. Its irreplaceable in narrow construction environment.


T103 hollow rock anchor bar

Size Outer Dia. (mm) Inner Dia. (mm) Ultimate Load (KN) Yield Load (KN) Weight (Kg/m) Thread
T103/78 103 74.5 2270 1800 25.3 R
T103/51 103 51 3660 2670 44.6 R


Anchor Coupling

Outer Dia. (mm) Length (mm) Weight (Kg) Thread
123 255 7.47 R
133 290 13.4 R

Anchor Nut

Size Type Key Size (mm) Length (mm) Weight (Kg)
T103/78 Spherical Collar Nut 125 80 3.42
T103/51 Spherical Collar Nut 125 130 5.60

Anchor Plate

Size Type Dimensions (mm) Thickness (mm) Hole Dia. (mm) Weight (Kg)
T103/78 Plat Plate 240*240 48 110 18.00
T103/78 Plat Plate 285*285 67 110 37.60
T103/51 Plat Plate 300*300 50 110 32.50
T103 Plat Plate 330*330 60 110 46.50


Size Outer Dia. (mm) Length (mm) Weight (Kg)
T103 165 80 2.94

Drill Bits

Type Size Diameter (mm)
EX T103 ø175, ø280
EXX T103 ø250
ESS-F T103 ø175
Clay Bit T103 ø220, ø280


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T103 hollow rock anchor bar consists hollow anchor bar, coupling, spherical collar nut, plate, centralizer and drill bit. It has already used for tunnel, pre-support, slope stabilization, coast, mine, water conservancy projects, building foundation and roadbed reinforcement. Its advantage is obvious especially in the narrow construction environment.

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