Dawson Construction Plant Ltd is pleased to announce first sale of a pair of their latest heavy lifting shackles with a safe working load of 100tonnes, this addition to the range of remote release shackles, designed and manufactured in the UK and sold by Pilequip Australia Pty Ltd to Bam International for use on an offshore project.
Although the shackles weight 410 kgs each, they can be handled with ease by 4 lifting points to engage it onto the tube in the correct horizontal position at 180 degrees opposite, the hydraulic pump then engages the pins through the tube wall so they are fully engaged by using a spreader beam between the shackles and the crane line, allows the lift to commence, once vertical and in position no doubt many metres above ground level, the pins are then extracted hydraulically to release the tube and complete the lift.
Dawson UK and ICE USA – Salvaging the Costa Concordia
In the Costa Concordia salvage Project, DAWSON Construction Products, UK were engaged to use a Dawson HPH 6500 double-acting hydraulic impact hammer and an ICE Inc (ICE USA) 66B hydraulic vibratory hammer in depths up to -50m below sea level. The equipment was used for a period of 6-months, from September 2012 to March 2013.
At the recent Ground Engineering Awards in the UK, Thiess John Holland were awarded the prestigous 2013 International Project of the Year for the Airport Link Project, Brisbane. Pilequip congratulates all who were involved in this significant infrastructure project and is pleased to have been involved in the piling work as an equipment supplier on this project.
If Piling Production is on your Projects Critical Path, then you can’t look past a DAWSON hydraulic Impact Hammer to achieve BEST PRODUCTIVITY.
With a blow rate of 80 bpm (blows per minute) at maximum stroke, the Dawson HPH15000 double-acting hydraulic impact hammer far exceeds the production of its nearest competitor, the IHC S280 hydrohammer, which only achieves 45bpm. i.e.the DAWSON is 78% faster than the IHC.
Aside from increased productivity, an additional benefit of a higher blow rate is that “it keeps the pile moving” (i.e. the pile doesn’t temporarily “set-up” between blows), so you are not overcoming a limiting friction with each successive blow in your driving regime. This attribute can be equated to the MOMENTUM of the pile, and the “Momentum delivered to the pile per minute” is what helps smaller, faster hammers potentially drive piles deeper than larger, slower hammers in certain geotechnical profiles, albeit the larger hammer having a greater maximum energy.
Pilequip has observed this for many years, where our smaller double-acting DAWSON hydraulic impact hammers drive sheet piles deeper than slower, free-fall hammers which have over twice the maximum energy of the DAWSON. It is the “Momentum delivered to the pile per minute” which enables the greater driving depth.
This is also applicable for the larger hammers on larger pile sections. I provide the following comparative data for your information:
** DAWSON HPH 15000 : Ram weight mass = 12,000kg; Max. rated energy = 150kN.m; Impact velocity at max drop height = 5.00m/s; Max blow rate at max drop height = 80bpm:
- Momentum per blow = 60,000 kg.m/s; Momentum delivered per minute = 4,800,000 kg.m/s per minute.
** IHC S280 : Ram weight mass = 13,600kg; Max. rated energy = 280kN.m; Impact velocity at max drop height = 6.42m/s; Max blow rate at max drop height = 45bpm:
- Momentum per blow = 87,312 kg.m/s; Momentum delivered per minute = 3,929,040 kg.m/s per minute.
From the above, you will notice that the DAWSON HPH 15000 delivers almost 22% more Momentum per minute than the IHC S280. This is why the DAWSON HPH 15000 (150kN.m) hydraulic impact hammer HAS driven large pile sections deeper that the IHC S280 (280kN.m) hydrohammer in particular geotechnical profiles.
From the above you will also notice that the impact velocity of the DAWSON HPH 15000 is significantly less than the IHC S280 hydrohammer – meaning less potential to damage the pile head and/or toe. The high 6.42m/s impact velocity of the double-acting IHC S280 puts the pile at high risk of damage to the pile head and/or pile toe, which can compromise the integrity of the pile and if damage occurs incur great cost (dollar and time) in replacement / rectification. The Dawson HPH 15000 has an impact velocity of only 5.00m/s. This is over 28% less than the IHC, and is even less than many free-falling hammers, minimising potential for pile damage associated with many double-acting hammers.
For PRODUCTIVITY on your next large piling project, you cannot look past the DAWSON HPH 15000 hydraulic impact hammer:
1. Greater blow rate : Achieves 80bpm in fully automatic mode at maximum drop height, making it the fastest hydraulic impact hammer in the industry, and hence highest production rate.
2. Greater momentum per minute delivered to the pile : Potentially driving the pile deeper than larger, slower hammers with greater maximum energy rating;
3. Lower impact velocity : Minimising risk of damage to the pile head and/or toe.
** PILEQUIP is the exclusive Dealer & Service Agent for DAWSON. If you would like to realise productivity gains (and project savings) on your next Project, contact Pilequip and enquire about the range of DAWSON double-acting hydraulic impact hammers for rental or purchase.
DAWSON HPH15000 hydraulic impact hammer : Fastest double-acting hydraulic impact hammer in the industry
The Project: to drive 136 no. x 32m diameter cofferdams, each is constructed by 196 pcs of flat web sheet piles.
The cofferdams were required to form the outer wall of the manmade island on the Hong Kong-Zhuhai-Macau Bridge project in Hong Kong.
Location: Offshore, next to the Hong Kong International Airport, just north of Lantau Island.
Vibratory hammers used: A total of 20 x ICE vibratory hammers were used to complete this Project, including 3 x sets of ICE 110C; 6 x sets of ICE 1412B; 1 x set of ICE 66C; 6 x sets of ICE 32B; and 4 x sets of 416L. The ICE vibratory hammers were selected for this project based on unmatchable efficiency, performance, simplicity, and reliability, as well as being recognised as the industry’s the true work horses.
Clamps used: 58 x ICE 140C single clamps mounted in sets of 6 on purpose-built adaptor plate (see photo’s) and 10 x ICE 142BH caisson clamps.
THE ICE ADVANTAGE: Each set of 6 x ICE 140C single clamps were mounted under the vibratory hammer by a simple one-piece adaptor plate, precisely machined from the highest strength forged steel. This design minimised weight, and kept height to a minimum as there was a strict crane height limitation criteria under the flight path to Hog Kong Airport. Also, the vibratory hammer width of less than 2,800mm including the 6 x ICE 140C single clamp arrangement allowed passage between the flat web sheet pile clusters when driving the 6 sheet pile groups (3,000mm total width). See photo’s attached.
For more information on how ICE vibratory hammers can be used to meet your next projects unique criteria and provide unmatchable efficiency, performance, simplicity, and reliability, please contact PILEQUIP, your exclusive Dealer and Service Support provider for ICE products.
“ICE vibratory hammers – recognised as the industry’s the true work horses”.
Pilequip has just taken delivery of a New ICE 28RF resonance free vibratory hammer.
The Industry has been calling for RESONANCE FREE technology.
** Resonance Free (RF) technology enables the vibratory hammer to be started, and run up to its desired operating speed (generally around 2300vpm) PRIOR to “unbalancing” the bias weights (or ‘eccenters’) which creates the vibration for installing and extracting piles.
On a conventional normal or high frequency vibratory hammer, the ‘eccenters’ spin in their “out of balance” operating mode during start-up and shutdown. When the speed of the vibratory hammer passes through around 700-1000vpm (the “resonant frequency” of the equipment), the equipment sends a peak vibration up through the crane-line and into the crane, as well as down through the pile being installed or extracted and into this soil. This peak vibration can be up to 5 times higher than the operating vibration of the hammer, and can cause structural damage and electrical damage to the crane, and well as damage to nearby pipes and services in the soil and nearby structures.
When using a Resonance Free (RF) vibratory hammer with adjustable moment, the peak vibrations in start-up and shutdown are eliminated. Once reaching desired operating speed, the eccenter weights are adjusted (or, the ‘unbalance’ is introduced) and the ‘unbalance’ can be steplessly adjusted between 0-100% of the maximum moment, to ensure the optimum amplitude and vibration is introduced to instal or extract the pile with minimal excessive vibration entering the soil, which could affect adjoining services and structures.
Pilequip has just taken delivery of a New ICE 28RF resonance free vibratory hammer from ICE, coupled with an ICE 600 power unit for our rental fleet. The ICE 28RF has a maximum centrifugal driving force of 1600kN (similar to the industry workhorse ICE 44/50, which has a maximum centrifugal driving force of around 1700-1750kN). The ICE 28RF vibratory hammer has a suspended weight of 7500kg when fitted an ICE 200TU single sheet pile clamp and 45m hose set, or 7850kg when fitted with a beam and 2 x ICE 100TC caisson clamps for tube piles. (Note : The ICE 600 power unit is CE certified, meeting Europe’s most stringent standards in terms of quality, design, safety, and environment).
Please contact Pilequip today and request a quotation for either rental or purchase of the ICE 28RF RESONANCE FREE vibratory hammer on your next project.
If you require any further information regarding the ICE 28RF vibratory hammer, please do not hesitate to contact Pilequip.
Tour de Cure will be the official charity of the IRONMAN® Asia Pacific Championship in Melbourne on 24 March 2013.
The partnership joins together two recognised brands and organisations with one focus – to find a cure for cancer.
Tour de Cure provide essential finance for Cancer research, Cancer education as well as support projects for families dealing with Cancer.
With one in three cancer cases being preventable, IRONMAN Asia Pacific will provide Tour de Cure an opportunity to not only raise money to help find a cure, but also to increase awareness amongst a new community.
Our MD, Brett Camm, has joined the Tour de Cure Team for the Asia-Pacific Iron Man 2013, where each team member will push themselves physically over the 3.8km swim, 180.1km cycle and 42.2km run motivated by raising money to help find a cure for cancer. Brett has set a personal fundraising target of $50,000. To do this, he needs your support. Please donate to Brett and help him reach his target, and help the Tour de Cure team make a difference in finding a cure for cancer. See link below:
Pilequip Australia Pty Limited has been the Australian / New Zealand representative for Bauer Maschinen & RTG Rammtechnik since 2006, and we are proud to announce that after many years of business development here, former Pilequip Director Mark Hellyer has launched Bauer Equipment Australia as its own entity, representing the full range of Bauer products and services.
Bauer Equipment Australia has a local shareholding, along with the parent Bauer Group. Mark is committed to the new entity in the role of Managing Director, and we thank Mark for his contribution whilst at Pilequip, and wish him well in all his future endeavours. For Bauer / RTG / Fambo / and other Bauer product enquires, sales, servicing or rentals, please visit www.bauerequipment.com.au or call +61 (0) 2 9838 3151. You can contact Mark on +61 (0) 401 004 264, or email email@example.com.
Brett Camm will remain with Pilequip, as 100% owner and Managing Director. Any enquiries regarding any of the Pilequip equipment, products or services should continue to be directed to Brett.