RockMaster Series Combo Bolt
Combo bolt assembly with grouting bell, lock nut, DualGuard™ HDPE sleeve and inner centralizer, DIVIDAC threadbar and expansion shell.
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RockMaster combo bolts, lattice girders, GFRP systems and full portfolio enquiries.
A focused product range for anchoring, grouting, tunnel support, cuttable face reinforcement and corrosion-protection packages.
Featured product
RockMaster Series Combo Bolt
A refined DIVIDAC combo-bolt solution combining early mechanical anchorage with a later grout-injection stage. The system architecture includes face hardware, steel bar, HDPE sleeve, grout pathway and expansion-shell anchoring in one coordinated assembly.
- Expansion-shell anchorage grips the borehole wall, secures bolt position and enables torque-activated early mechanical support before final grouting.
- Post-grout durability through full-length encapsulation and enhanced corrosion protection.
- DualGuard™ centralization helps maintain minimum grout cover around the threadbar and tunnel-face interface.
- Protected threadbar system using HDPE sleeve and controlled grout path to isolate steel from aggressive ground conditions.
- Combo bolt and expansion shell are Hong Kong Intellectual Property design registered by DIVIDAC.
Product catalogue.
Featured product families are shown below. For additional DIVIDAC tunneling and ground-support products, use the full portfolio enquiry link.
Lattice Girders
3-bar and 4-bar systematic support arches fabricated from high-strength round bars for tunnel excavation and concrete lining support.
View product page →GFRP Soil Nails & Rock Bolts
Glass fiber reinforced polymer bars for temporary works, tunnel face bolts, soil nails and rock bolts where cuttability, corrosion resistance and lighter handling are important.
View product page →Inquire for Full Portfolio of Products
Contact DIVIDAC for additional tunneling and ground-support products, project-specific systems, documentation and availability.
Inquire now →Typical information required for quotation.
For a fast response, include the following data when contacting DIVIDAC.
| Requirement | Examples |
|---|---|
| Product type | RockMaster combo bolt, lattice girder, GFRP soil nail / rock bolt, full portfolio enquiry or project-specific component package. |
| Quantity | Trial quantity, project quantity or scheduled call-off requirement. |
| Dimensions | Length, bar diameter, borehole assumptions, girder height, plate size, nut/coupler needs and cuttability requirements. |
| Protection requirements | PE sleeve, coating, grout cover, GFRP corrosion resistance or project corrosion-protection requirements. |
| Delivery terms | FOB, FCA, warehouse pickup, Hong Kong delivery or project destination. |
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DIVIDAC can prepare product descriptions, component lists and technical resource links for contractor review.