Rock anchor installation isn't a standard drill-and-grout scope. Rock mass variability — fractures, seams, voids, and alternating rock quality — changes anchor bond length requirements from hole to hole. A sub without geotechnical engineering support can't adapt the installation program to those conditions without stopping production for redesign.
GeoStabilization International drills and installs rock anchors with a field engineer who monitors drill performance, identifies rock quality changes, and adjusts anchor length and grout volume in real time. Our purpose-built drill rigs access vertical rock faces, overhanging slopes, and grades that exclude conventional drilling equipment.
GeoStabilization International provides specialty rock anchor subcontract services on rockfall mitigation, slope reinforcement, foundation anchoring, and tunnel portal projects — drill capability and geotechnical engineering integrated under one subcontract.
Passive rock bolt systems reinforce rock mass by pinning discontinuities and preventing block movement. GSI installs fully grouted and resin-anchored passive bolts to engineer-specified depth and spacing with full pull-test documentation.
Active rock anchors apply pre-stress to the rock mass during installation, providing immediate reinforcement against known failure mechanisms. Our engineers design anchor inclination and pre-stress load based on your site's discontinuity orientation and block weight data.
Foundation rock anchors for retaining walls and bridge abutments carry design loads at depth in rock, eliminating the bearing capacity constraints of shallow foundation systems on steep terrain.
Rock anchor installation on steep and vertical faces requires equipment that can work on grade while maintaining drill alignment and providing thrust force to penetrate competent rock. GeoStabilization International operates purpose-built limited-access drill rigs and spider excavators working on grades up to 80 degrees — the same grades where rock anchors are most commonly needed.
That access capability removes the most common schedule risk in rock anchor scopes: the need to build and move temporary access platforms. Our equipment accesses the rock face directly, minimizing mobilization cost and allowing GSI to complete scopes that other drilling subs price with significant contingency or decline to bid.
GeoStabilization International responds to subcontract scope inquiries within one business day. Call or complete the form below.
