I. Introduction to Hollow Grouting Anchor Bolts:
The hollow grouting anchor body is essentially the grouting tube. After injecting grouting fluid, it not only anchors the rod but also, when the grouting pressure is high, some of the grout seeps into the cracks of the anchor hole, reinforcing the surrounding rock. A plug and a vent pipe should be installed in the upward hole.
The main components of hollow anchor bars include: hollow anchor bar body, plug, washer, nut, and anchor head (drill bit).
II. Characteristics of Hollow Grouting Anchor Bolt:
● Hollow design, enabling the function of casting.
● Full grouting, pressure grouting available.
The rod body maintains good centrality; the mortar can fully encase the anchor rod, preventing rust and achieving the purpose of long-term support.
● Easy installation; no on-site threading required for installing washers and nuts.
● Utilizes upward exhaust anchor heads, completely resolving the exhaust issue of hollow anchor rods above the horizontal line.
Section 3: HOLLOW GRAOUT ANCHOR RANGE:
Hollow anchor rods are suitable for medium geological conditions, supporting and advancing 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. Pressure grouting through the hollow anchor rod body can achieve the purpose of consolidating broken rock mass, intercepting groundwater, and preventing corrosion of the rod body, enabling rapid formation of support force and control of the stability of surrounding rock.
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 the grouting pump operator must be well-coordinated.
Once casting is complete, close the valve first, then attend to the slurry pump.
● The injection port 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, so no translation needed.) | 12.7 | φ40-φ42 |
| GQ-D25 | 25*5 | ≥180 | - | ≥6 | Left/Right-handed | 10/12.7 | φ40-φ42 |
| GQ-D25 | 25x5 (Iron Mark) | ≥153 | ≥102 | ≥21 | Left/Right-handed | 10/12.7 | φ40-φ42 |
| GQ-D25 | 25x7 (Iron Gauge) | ≥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 rod mechanical property specifications can be tailored to customer and production requirements. | ||||||
| 2. Anchor rod length can be customized according to customer requirements. | |||||||
| 3. Washers, nuts, stoppers, and anchor heads are available upon customer's request. | |||||||
