I. Introduction to Hollow Grouting Anchor Bolts:
The hollow grouting bolt body is essentially the grouting tube. After injecting grouting fluid, it not only anchors the bolt but also, when the grouting pressure is high, some of the grouting may渗入the fissures of the anchor hole, reinforcing the surrounding rock. A plug and a vent pipe should be installed in the upward bore.
The main components of hollow anchor rods include the hollow anchor rod body, plug, washer, nut, and anchor head (drill bit).
II. Features of Hollow Grouting Anchor Bolts:
● Hollow design, enabling the function of casting.
● Full grouting, pressure grouting available.
The rod body maintains good centralization; the mortar can completely encase the anchor rod, preventing rust and achieving the purpose of long-term support.
● Easy installation, no on-site thread cutting required for the installation of washers and nuts.
● Utilizes upward exhaust anchor heads, completely resolving the exhaust issue of hollow anchor rods above the horizontal line.
Section 3: HOLLOW GROUTED BOLT RANGE:
Hollow anchor rods are suitable for medium geological conditions, temporary and advance support. They are mainly used in projects such as railways, highways, tunnels, mines, hydraulic hubs, slopes, embankments, bridge foundations, river and lake banks, high-rise building foundations, and reinforcement of structures. By pressure grouting through the hollow anchor rod body, it can achieve the purpose of consolidating broken rock mass, intercepting groundwater, and preventing corrosion of the rod, rapidly forming support force, and controlling the stability of the surrounding rock.
Section 4: Precautions for the Construction of Hollow Grouting Anchor Bolts
Casting workers must wear protective gear.
Thoroughly inspect machinery, equipment, and wiring to prevent electric shock injuries.
● Operators strictly follow the operational procedures.
The grouting worker and grouting pump operator must be well-coordinated.
After grouting is complete, the valve must be closed first, then attend to the slurry pump.
● The pouring hole is not to be aimed at people.
| Product Model | Nominal O.D. * Wall Thickness (mm) | Tensile Strength (KN) | Yield Strength (KN) | Tensile elongation (%) | Thread direction | Pitch (mm) | Anchor bolt hole diameter (mm) |
| GQ-D25 | 25*3 | ≥150 | - | ≥6 | (No Chinese content provided) | 12.7 | φ40-φ42 |
| GQ-D25 | 25*5 | ≥180 | - | ≥6 | Left/Right-handed | 10/12.7 | φ40-φ42 |
| GQ-D25 | 25*5 (Iron Standard) | ≥153 | ≥102 | ≥21 | Left/Right-handed | 10/12.7 | φ40-φ42 |
| GQ-D25 | 25*7 (Iron Standard) | ≥193 | ≥128 | ≥21 | Left/Right-handed | 10/12.7 | φ40-φ42 |
| GQ-D28 | 25*8 | ≥280 | - | ≥6 | Left/Right-handed | 10/12.7 | φ48 |
| GQ-D32 | 32*6 | ≥280 | - | ≥6 | Left/Right-handed | 10/12.7 | φ50 |
| GQ-D38 | 38*7 | ≥350 | - | ≥6 | Left/Right-handed | 10/12.7 | φ75 |
| GQ-D51 | 51*8 | ≥500 | - | ≥6 | Left/Right-handed | 10/12.7 | φ80 |
| Note | 1. Hollow anchor bolt mechanical property specifications can be tailored to customer and production requirements. | ||||||
| 2. Anchor rod length can be customized to meet customer requirements. | |||||||
| 3. Gaskets, nuts, stoppers, and anchor heads can be provided according to customer requirements. | |||||||
