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Completed Projects

GU 18 Sheet Pile-Driving—Bentleigh Crossing Test Site
Testing for noise and vibration
Melbourne, Australia

  • Situation:
    • The project calls for many km of sheet pile walls to permit grade separation of light rail transit.
    • Very hard, dry clayey sands. Pre boring was required.
  • Drivers tested:
    • Bauer RGT 19 fitted with an MR105V variable moment vibrator.
    • RTI's RD 260 Resonator
  • Results:
    • Production rate (driving 14 m long GU18 production piles in similarly spaced, full depth, pre bored holes, 12.5 m penetration):
      • RGT and the MR105V hammer: 12 minutes (approx)
      • RD 260 Resonator: 3-4 minutes (approx)
    • Noise
      • RGT and the MR105V hammer: Exceeded noise limit
      • RD 260 Resonator: Somewhat quieter the above and quieter than the light rail trains.
    • Vibration
      • RGT and the MR105V hammer: Exceeded vibration limit
      • RD 260 Resonator: < 1/25th of the above. (Typically < 1mm/sec at 10 metres. The RD 260 can drive a pile adjacent to a glass of wine without spilling a drop.)
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Austral Construction used the RTI RD 260 Resonator
Bentleigh & McKinnon Railway Stations
Melbourne, Australia

  • Situation:
    • Installation of cofferdams and several kms of sheet pile walls to permit grade separation of light rail transit through dense urban areas.
    • Pile type: PU32 and GU18 sheet piles
    • Very hard, dry clayey sands. Pre boring was required.
  • Problem:
    • Conventional high frequency, variable moment vibrators exceeded acceptable noise and vibration limits.
    • Two Giken 173 press machines with pre boring tooling failed to meet production targets and suffered frequent breakdowns.
  • Solution: Austral Construction equipped a Liebherr 155, an ABI TM 11/14S and a Bauer 16 RGT with RD 260 Resonator drivers and achieved single machine productions of up to 34 PU32 piles in a single shift, with 10 piles pitched and driven in a 70 minute period.
  • Outcome:
    • Exceeded production target. (Typical production in the 15 to 24 pile range per shift.)
    • Lower noise than conventional vibratory equipment
    • Less than 1/25 the ground borne vibration than conventional vibratory equipment
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Van 't Hek Contractors used the RTI RD 260 Resonator
Schiedam (Roterdam), The Netherlands

  • Situation:
    • The project involved a canal wall upgrade consisting of permanent AZ 13 x 770 sheet piles 13.5 m long with a new concrete cap and stone walkway along a residential easement.
    • An old, fragile masonry water main crossed the sheet pile wall alignment at an unspecified depth. The City of Schiedam demanded that a zero ground vibration method be used for the section of wall crossing the water main.
    • The sheet piles were driven using a PVE 23—19 (500 HP) vibrator until vibration sensitive areas were encountered.
    • Rather than mobilise the slow and cumbersome pile press equipment van ‘t Hek elected to use the RD 260 Resonator.
    • The Resonator was easily and inexpensively mobilized to site and mated with the barge mounted Excavator pile driver.
  • Soils: loose to compact sands and soil to firm clays.
  • Efficiency: The AZ 13 piles were driven as quickly as 2.75 minutes per pair.
  • Ground vibration: less than 1/5 of allowable levels (typically < 1 mm/s)
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De Koning Constructors BV uses RTI RD 260 for shoring
Den Haag (The Hague), The Netherlands, 2016

  • Pile type: HP 310 x 110, 12.8 m (42 feet) in length
  • Driver:RTI RD 260 Resonator
    • The free hanging The RD 260 Resonator can drive, pull, re plumb and relocate piles easily to maintain a shoring wall alignment and plumb.
    • The RD 260 Resonator drives HP piles very well due to the concentric centre of mass, centre of stiffness and clamp location. This minimizes noise and maximizes axial resonance of the pile. The low displacement piles penetrate quickly.
    • 260 can drive similar HP piles to working loads of 100 to 125 tonnes.
  • Situation The project required the installation of HP piles and concrete lagging to permit the removal of contaminated soils at a site immediately adjacent to a masonry structure. The neighbouring structure required protection from vibration and settlements.
  • Outcome
    • High productions in the saturated sandy silt soils maintained a short schedule for driving and kept costs down.
    • Minimum disturbance to the neighbouring structure maintained a tight tolerance to the structure exterior wall.
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Patullo Bridge Trestle Replacement
Vancouver, BC, Canada - Summer 2012
Using the RD 200 Resonant Pile Driver

  • North American Pile Driving Ltd drove 98 piles.
    • Pile type: HP 360 x 132 kg (HP 14 x 89lbs), 40 m (132 ft) in length
    • Soil type: sands and silty sands with SPT blow counts varying from 5 to 30 per 300 mm, generally increasing with depth.
  • Tight, 4 pile clusters - less than 300 mm (12 inches) between piles
  • Rapid installation - Up to 1000 ft of piling was driven in a single shift despite poor access and numerous shut downs during train traffic.
  • No ground disturbance
    • A wine glass placed within 300 mm of the pile during Resonant driving did not show a ripple in the surface.
    • No bridge settlements were recorded during Resonant Driving.
    • Conventional vibration monitoring equipment is not sensitive enough to pick up the vibrations produced using the Resonant Driver.
  • Advantages:
    • Faster than conventional drivers
    • No ground settlement
    • Able to install piles within 300mm of one another
    • Installation did not disrupt rail services
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Sonic resonant driver rd 200.jpg

Bluemax Environmental Drilling uses RTI's RRD 100 Resonant Drill.
Vancouver BC, Canada

  • Location: parking lot at Oakridge Mall, Vancouver, BC.
  • Diameter:
    • 102 mm (4") cores
    • 155 mm (6") casing to achieve 100% core recovery.
  • Depth: 12 m to 18 m
  • Soil type: contaminated - very dense silt and clay glacial tills, granite cobbles and boulders and saturated sands.
  • Advantages:
    • Cost savings due to relatively small amount of contaminated spoil and water that needed to be treated.
    • Low disruption to client's business due to small footprint of equipment.
    • Competitive price point - the 10 tonne rig could drill within in minutes of arrival on site. Ideal for projects on small sites and constrained access
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Sonic drill - RRD 110

Former Fuel Station Site
Burnaby BC, Canada

  • Tervita Drilling (formerly Beck Environmental Drilling Services) drilled holes to depths of 12 to 27 m in Burnaby, BC.
  • The track mount Fraste XL Drill advanced a 100 mm dia core barrel and 150 mm dia casing through dense clay silt tills, gravels and granite boulders to return continuous samples for environmental analysis.
  • The drill obtained excellent quality samples with minimum ground disturbance.
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RRD 150

Robert's Bank Port Terminal Expansion
Vancouver BC, Canada

  • Foundex Explorations drilled 200 holes to depths of 20 to 28 m from a barge off the coast of the Port of Vancouver.
  • The truck mount drill was stationed on a spud barge for deployment onto tidal flats and deep water.
  • The sampling holes were developed in soft alluvial soils using the Aqualoc system supplied by SonicSampling and Supply.
  • The 120 mm dia holes were completed in as little as 2 hours with continuous sampling.
  • The project obtained excellent quality samples with minimum disturbance and completed the project ahead of schedule.
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RRD 150

Surrey Memorial Hospital
Surrey, BC, Canada

  • Foundex Explorations drilled 140 holes to depths of 16-18 m.
  • The 105 mm dia holes were cased to full depth and backfilled with pea gravel to form permanent vertical gravel drains.
  • Soils consisted of 4 to 7 m of silty clay and clay tills over very dense sand and gravel tills.
  • The sand and gravel tills were layered, artesian, contained cobbles and boulders and proved SPT blow counts of 100 to 150 bl/300mm.
  • Both conventional mud rotary and sonic heads (CSR) found the sand and gravel tills very challenging to drill.
  • The RTI RRD 150 head excelled, with production of 144 m per day.
  • The drill penetrated the dense till layer at rates of 90 to 120 seconds per 2 m drill string.
  • The drilling encountered massive limestone and granite boulders up to 1.2 m in thickness which we cored in 10 to 15 minutes.
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RRD 150

MARL Technologies yard
Edmonton, AB, Canada

  • Marl Technologies field tested the RRD 110 Resonant Drill in their yard in April and May of 2010.
  • The drill advanced 100 mm dia casing with a full faced button bit.
  • Water flush was used at low flow and high pressure.
  • Casing was advanced to between 28 and 32 meters on two occasions.
  • Drill casing advance rates were very fast with 2 m rods being installed in 5 to 20 seconds to depths of 26 m with moderate crowd, rotary of 135 rpm and vibration at approximately 40% of rated power.
  • Soils consisted of sand, silt and clay tills to 7 m and soft clay shales to a depth of 26 m.
  • SPT blow counts were 10 to 40 / 300mm.
  • Below 26 m the clay shales become more competent, are inter-bedded with silt and sand stones and increase to 100 bl/300 mm.
  • Within the 100 blow shales and siltstones casing advance slowed to 2 m per 1.5 minutes.
  • Test hole data
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RRD 110

World's first and only Heli Portable Resonant Drill Rig
Pebble Mine, Iliamna, Alaska

  • Drilled over 30 holes to depths of 20 to 80 metres.
  • Zero impact drilling and mobilization was required in the sensitive tundra environment.
  • All moves and support were conducted with helicopters.
  • The drill head and mount frame lift totalled under 1,000 kg (2200 lbs).
  • Developed holes through the overburden with artesian conditions while using a minimum of flush water and spoil.
  • Resonant drilling achieved 100% sample recovery, minimized disturbance of sample soils, increased production, and eased environmental impact.
  • Core samples of 105 mm (4") diameter with 150 mm (6") casings were drilled.
  • SPT's were taken at 3 m (10 ft) intervals and in many cases piezometer were grouted into place.
  • Holes and moves were completed in 2 to 4 shifts.
  • The program was completed ahead of schedule and additional holes were completed ahead of the weather window.
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RRD 110

John Hart Dam test grouting and instrumentation
Campbell River, BC, Canada

  • Foundex Explorations drilled over 50 holes to depths of 20 to 35 metres at the dam site as part of a dam stabilization and instrumentation contract.
  • The truck mount drill completed holes on both abutments and upon the earth dam face to install instrumentation prior to a jet grouting program.
  • The Resonant Drill was used to develop PVC cased holes from which the jet grouting was conducted, to prevent uncontrolled soil loss.
  • Resonant drilling was used to ensure minimized disturbance of the dam soils with high production and minimized use of flushing fluids when setting the PVC casing.
  • Core samples of 150 mm (6") diameter with 200 mm dia (8") casings were drilled and 150 mm dia (6") PVC casing installed.
  • The holes were developed in variable soils from sands and gravels to clay, silts, till and rock.
  • Up to 2 holes a shift were completed.
  • The project obtained excellent quality samples with 100% return, minimum disturbance and excellent rates of production.
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RRD 100

Resonant pile driving timber trestle replacement
Fraser River Delta, Vancouver, BC, Canada

  • North American Pile Driving drove piles for CN Railways at a timber trestle replacement project located within the delta of the Fraser River in Vancouver, BC, Canada.
  • The project involved the driving of HP 360 x 132 kg (HP 14 x 89lbs) piles 36 m (120 ft) in length in tight 4 pile clusters.
  • After encountering difficulties using conventional hammers a 140 kW (200 Hp) Resonant Pile Driver was introduced to the site in an effort to remedy the driving restrictions and improve production.
  • Vibration monitoring during Resonant Driving indicated particle velocities of <3 mm/sec (1/5 to 1/10th) of acceptable vibration levels at just 1 m.
  • Conventional vibration monitoring equipment typically will not even trigger during Resonant Driving.
  • The Resonant Driver completed the piles in 10 - 14 minutes of driving whereas the impact hammers required between 40 and 80 minutes of driving time to complete a pile.
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RD 140