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Mainmark employs polymeric and cementitious injection products for ground stabilisation and void filling.
Mainmark employs polymeric and cementitious injection products for ground stabilisation and void filling.
 









Is uneven ground causing machinery to malfunction?

Ground subsidence below concrete slabs and driveways may be causing machinery to malfunction on quarry sites, according to a ground engineering specialist.

Often overlooked, yet easy to address, subsidence can cause costly downtime and production bottlenecks if not identified early.

“Machinery malfunction is often attributed to poor quality or shoddy equipment, when in fact the problem may be a result of ground subsidence,” said Tom Bailey from Mainmark, which provides a range of specialist ground engineering and asset preservation solutions for commercial, industrial, civil infrastructure and mining sectors.

Mainmark’s products and services include solutions for ground stabilisation, void filling, stopping water ingress, raising and levelling on-ground and in-ground structures, fixing anchors into rock faces and embankments, and other related ground engineering processes.

“Quarry equipment is extremely heavy and its repeated mechanical vibrations can cause subsidence of concrete bases and driveways over time,” Bailey said. “In turn, minor variances in ground level can cause machinery parts to misalign and the equipment to break down.”

Battling subsidence

Subsidence refers to the gradual settlement in or sinking of the sub-base or sub-grade.

In addition to mechanical vibrations, common causes of subsidence include drainage issues (caused by broken pipework or a gradient that inhibits surface water run-off) and poorly compacted fill.

“Minor variances in ground level caused by subsidence can have a significant and costly impact on the smooth running of quarry machinery,” Bailey said. “It can give rise to additional maintenance costs and possibly safety risks.”

As machinery parts change configuration, the unnecessary stress may bring about early warning signs of damage. These can include unusual noise from the machinery, abnormal wear and tear (particularly on bases) and excessive wear on machinery paths and bases.

Bailey recommended addressing uneven concrete bases and driveways early, to minimise the cost of downtime.

“With modern ground engineering techniques, rectifying subsidence problems can be easier and quicker than many anticipate.

“Resin injection technology, such as Mainmark’s Uretek solution, is a proven, convenient, efficient and cost-effective alternative to traditional ground support techniques, such as underpinning.

“This method injects resin at various depths to consolidate and re-stabilise the ground.”

Fast-set resin injection can be applied in-situ, with minimal interruption to site operations.

Depending on the scope of work, a project may be completed in a matter of days and performed outside of programmed maintenance shutdown periods, allowing for flexible scheduling.

Mainmark offers a full range of polymeric and cementitious injection products for ground stabilisation and void filling, including its patented Uretek resin injection solutions.

A range of resins are available, including polyurethane, urea silicate, phenolic and amino-plastic resins, depending on ground conditions. Mainmark holds required government and industry licences, and its civil and mining division is ISO 9001 certified.

Mainmark’s methods strengthen and stabilise the ground with zero negative impact on the environment. These specialist techniques deliver optimum results, and projects can often be completed while site operations continue. Non-invasive methods mean no excavation is required, minimising mess and hazards.

Levelling concrete driveways

One of Australia’s largest sandstone quarries appointed Mainmark to re-level its concrete driveways.

Several of the concrete slabs had sunk, creating uneven driveways that posed a risk to safety. 

The mechanical vibrations caused by loading heavy granite and sandstone onto trucks had caused the ground beneath the driveways to weaken and sink. This made it difficult to operate forklifts safely, as these vehicles typically require level ground.

Mainmark’s expanding structural resin, Uretek, was injected under the driveways through 16mm diameter holes to re-support and re-level it.

The engineered resins combine chemically on entering the ground. The process is monitored by laser level to maintain control and deliver a precise result.

In just one day, Mainmark re-levelled and re-supported the various sections of the concrete driveways, facilitating safer access to and loading of quarry outputs. 

Source: Mainmark

According to Mainmark, minor variances in ground level caused by subsidence can have a costly impact on quarry machinery.
According to Mainmark, minor variances in ground level caused by subsidence can have a costly impact on quarry machinery.










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Tuesday, 20 August, 2019 3:47pm
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