Rock Bolting, Dowels, Anchors and Drainage
High-capacity rock bolts, post-tensioned cable anchors, and sub-horizontal drainage systems to control internal groundwater pressures.
Service Overview
Targeted reinforcement systems selected to address the governing geological mechanism, access constraints, and long-term performance requirements. Rather than applying a single system across an entire face, we match the reinforcement to the failure mode: local bolting for discrete blocks and wedges, deeper post-tensioned cable anchors where instability is large-scale, and sub-horizontal drainage to relieve groundwater pressure within joints and fractures.
Structural rock reinforcement requires precise alignment with the rock mass discontinuity network. DCC utilizes crawler-mounted drill rigs, crane-suspended drill masts, and pneumatic hand drills to install high-yield passive steel dowels (B500B / threadbar), active resin/cementitious-grouted rock bolts, and multi-strand post-tensioned cable anchors for deep slope equilibrium. Complementary perforated sub-horizontal drainage pipes relieve groundwater pressure within joints and fractures that could otherwise trigger slope instability during rainfall events.
Key Features & Capabilities
Our Delivery Process
Percussion Drilling & Logging
Specialist crawler rigs drill designated bolt trajectories, logged by geologists to verify rock strata competence and depth.
Anchor Bar / Cable Insertion
High-tensile steel bars or multi-strand cables fitted with centralizers and corrosion protection sleeves are placed.
Pressure Grouting & Curing
High-strength non-shrink cementitious grout is pumped under controlled pressure from the bottom up to eliminate air voids.
Post-Tensioning & Proof Testing
Calibrated hydraulic jacks apply proof loads up to 150% of design capacity, with full load-extension logging recorded for verification.
Other Services
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