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Service 02

Tower Foundation Rock Blasting

Telecom and transmission towers are often placed on hilltops and slopes where the footing has to be cut into hard rock. We excavate these foundation pits with small, controlled blasts so the surrounding ground, roads and houses are protected.

We work alongside the excavator and dewatering teams on site, so the pit is broken, cleared and kept dry ready for concreting.

Crew in hard hats preparing a rock foundation pit for a tower, with the blast cordon tape strung across the site behind them

Applications

Where it is used

  • Telecom tower footings
  • Transmission tower footings
  • Sites in hilly and remote terrain with limited access
  • Pits close to roads, houses and existing lines
  • Trimming pits to design level for concreting

Our method

How we deliver it

  1. 01

    Site survey

    Our engineer inspects the rock, nearby structures, utilities, access and drainage, and records what must be protected.

  2. 02

    Blast design

    A written blast design is prepared for the site and checked against the protection needs found in the survey.

  3. 03

    Permits

    The design is signed off, required permits are confirmed and the police and neighbours are informed before work starts.

  4. 04

    Drilling

    Holes are drilled, measured and logged against the design. Any change is recorded before charging.

  5. 05

    Charging

    Explosives are issued from licensed stock, recorded and loaded by licensed staff only. Mats are placed where required.

  6. 06

    Firing

    The exclusion zone is cleared, sentries are posted, warnings are sounded and the licensed shot-firer fires from a safe position.

  7. 07

    Clearance and reporting

    The area is checked for misfires before the all-clear. Results and monitoring readings are recorded and shared with the client.

Equipment

Plant and equipment

  • Handheld rock drills
  • Portable compressors
  • Blast mats
  • Dewatering pumps (with client or our teams)

Safety controls

Safety on every job

  • Written blast design and risk assessment for every blast
  • Licensed shot-firer in charge of charging and firing
  • Exclusion zone, sentries and audible warnings before firing
  • Police and neighbours informed before blasting
  • Post-blast misfire check before the all-clear
  • Crews in full PPE on every site
  • Low, measured charges suited to confined pits
  • Blast mats over the pit near roads and houses
  • Coordination with the line operator where lines are live

Projects

Related projects

All projects
Tower FoundationsCrew in hard hats preparing a rock foundation pit for a tower, with the blast cordon tape strung across the site behind them

Ukuwela to Kiribathkumbura High Tension Line

Kalpataru Projects International Limited · Ukuwela to Kiribathkumbura, Central Province

Excavation, drilling and blasting for high tension transmission tower foundations along the Ukuwela to Kiribathkumbura line.

Rock between you and your programme? Talk to our engineers.

Send your drawings and an estimate of the rock volume or number of tower footings. Our engineers will reply with a method and a price.