When Palisades diabase sill, New Jersey Highlands gneiss, and Delaware Water Gap quartzite are exposed by highway construction or natural erosion along I-80 through the Delaware Water Gap, I-78 through the Watchung Mountains, Route 23 along the Palisades, and Route 15 through the Highlands, the resulting rock faces contain discontinuities — joints, bedding planes, and fracture systems — that define potential failure blocks. Without reinforcement, these blocks will eventually detach.
Access Limited installs rock bolt and anchor systems across New Jersey using Spider Drill Rigs that access near-vertical faces where conventional drill rigs cannot operate.
Fully grouted rock bolts are passive reinforcement elements installed through the failure surface into competent rock behind it. Once grouted, they provide continuous load transfer along their entire length.
Tensioned rock anchors apply active compressive load across open joints and fracture systems — clamping the rock mass together before any movement occurs. These are engineered for large, well-defined failure blocks.
Pattern bolting installs a systematic grid of rock bolts across an entire slope face — reinforcing the overall rock mass rather than targeting individual blocks. This approach is used on highly fractured faces where discrete failure blocks cannot be individually identified.
Rock dowels are untensioned reinforcement elements grouted into the rock mass to provide shear resistance across discontinuities. They are used where passive reinforcement is sufficient and active tensioning is not required.
Access Limited brings specialty rockfall equipment to New Jersey's constrained, high-traffic corridors.
See why NJDOT, NJ Transit, Palisades Interstate Park Commission, utility providers, and Port Authority trust Access Limited for rock bolting and anchor systems and rockfall mitigation across New Jersey.
Access Limited delivers specialized rock bolting and anchor systems across New Jersey's rockfall corridors. Complete the form to request an assessment or call our team directly.
