The bearing capacity of the rock bolt is mainly determined by the frictional resistance between the rock and soil layer and the anchoring grouting body. The bonding strength values between rock and soil layer and the anchoring grouting body will not change, the larger hole diameter anchor cable, the greater the bearing capacity of unit length of anchor cable.
The anchorage length of soil rock bolt commonly uses 6 to 12 m, commonly used rock bolt anchorage length usually uses 3 to 8 m. Increasing the anchor length, anchor bearing capacity does not improve. Traditional anchor hole is 150-200 mm in diameter, its bearing capacity is limited, the bearing capacity is improved if increasing the rock bolt hole diameter. Therefore, the large diameter rock bolt is produced.
Sinorock is the first manufacturer of large diameter rock bolt, it is applied for constructions of shallow buried parts of tunnel portal, sand, gravel, silt, and clays, and in soft to medium fractured rock formations. The large diameter rock bolt can reduce surface subsidence, prevent collapse effectively, improve bending strength and control inclination. It has low noise and small vibration, so it is convenient for construction. Need more information? Please visit our website!
