Hydrodemolition – A gentler approach
TO BREAKING THROUGH CONCRETE
Traditionally, concrete removal has been completed using pneumatic chipping hammers
Intergroup’s new hydrodemolition technique uses high- or ultra-high-pressure water blasting to remove concrete – ‘blasting away’ traditional demolition issues.
- Partial removal of aged/damaged concrete in preparation for repair
- Cutting into new or existing structures to facilitate tie-ins
- Scabbling for bonding new concrete to old
- Isolated troubleshooting repairs to recently completed infrastructure
- Expertise in wharves, bridges, buildings, tunnels and drainage networks
- High-pressure water jetting (15,000-25,000psi) or ultra-high-pressure water jetting (25,000-55,000psi)
- 180hp right up to 1,000hp
- Hand-lancing capability up to six lances
- Robotic tools for higher productivity, safety and efficiency, e.g. Conjet
- A wide range of customised tools (lances and nozzles) selected to suit your needs
BENEFITS TO YOU
Cost-Effectiveness, Speed and Efficiency
- A one-stop shop – combined with your other infrastructure/industrial services needs
- Varying selection of machine types, power rating and water pressures allows a tailored service to suit your needs, budget and programme
- Robotics and high-pressure water jetting for speed and efficiency
- Less removal of sound concrete means less time and money spent replacing it
- More accurate – less concrete is removed
- No cracking or fissures to the adjacent sound concrete (as can occur when using hammers)
- Doesn’t damage or bend reinforcing steel out of shape
Risk Reduction and Reputation
- Full Kevlar wet-weather equipment and full-face air-fed helmets for safety
- Robotic tools for safety
- Operators trained in safe work at heights, tidal work and water jetting
- Containment of waste for safety and environmental protection (using vacuum loading)
- Environmental protection methodologies tailored to suit the environment
- Manukau Harbour Crossing – hydro demolition for abutment removal to facilitate steel tie-ins.
- Hydrodemolition bridge work for Fulton Hogan and Downer in Thames.
- Victoria Park Tunnel – Intergroup’s hydro demolition experts were called in to adjust the drainage that had been constructed to ensure it could handle a 100-year flooding event.
- Scabbling work using hydro demolition for Fletcher Construction on concrete structures in Christchurch and on Watercare’s wastewater networks.
- Wharf repair jobs using hydro demolition including Queens Wharf in Fiji, wharves in Raglan and Birkenhead, Captain Cook Wharf, Queens Wharf and the Wynyard Quarter in Auckland, and Lyttelton Port.