BRIDGES & PIERS
PRECISION BLASTING
Blasting is a critical technique for the safe and efficient removal of complex bridge systems and their supporting structures. These projects demand careful planning to account for height, material strength, traffic constraints, and environmental sensitivity—especially when spans cross waterways or active infrastructure. Since bridges and piers are typically engineered based on the weight-picking capacity of available cranes, their design can present significant challenges for mechanical demolition. In such cases, blasting provides a more efficient and controllable solution. Demtech specializes in engineered blast designs and sequencing that bring down bridge components cleanly while preserving nearby assets and reducing downtime.
BRIDGE CABLES/TOWERS
Bridge towers and suspension cables—often towering and under extreme tension—require precise sequencing and structural analysis to be removed safely. Detonation is typically focused at anchor points or tension zones to allow controlled collapse of the tower without endangering adjacent elements. Cable removal must be timed to avoid rebound forces and protect surrounding structures.
TRUSS BRIDGES
Truss bridges, made of interlocking steel or iron, are typically dropped using base-cut or connection-point charges that weaken the framework and allow gravity to bring the span down in a controlled direction. Their rigidity and span length demand detailed sequencing to avoid unplanned twisting, tipping, or secondary impacts during collapse.
CONCRETE BRIDGE PIERS
Concrete piers often support large spans and are built to withstand tremendous force, making them ideal candidates for precision blasting. Charges are placed to shear the column at specific elevations, causing it to buckle and collapse in a controlled footprint. Blasting allows for removal without damaging nearby piers, abutments, or waterway protections.
