Site investigation is the initial process we carry out to collect and assess data. This means we can report on potential hazards, such as voids, caused by previous mine workings or sinkholes caused by ground movement. It’s essential that a site investigation is carried out before the commencement of any construction work.
SPTs are taken in overburden until bedrock is proven. Once a failure is found in bedrock by SPT, rotary coring is used to determine rock formation and quality at specific drill depths.
Core samples are taken away. These are laboratory tested and the results logged by a geo-environmental engineer. The necessary reports are then created about specific boreholes.
In some cases, open holing techniques are carried out using drag bits, tricone rock rollers or PCD bits. This is a more cost-effective method as it provides an instant insight into strata by bringing up deposits from rock cuttings via air or water flush drilling.
Air Flush or Water Flush Drilling?
We specialise in both air flush and water flush drilling, using a variety of compressors and water pumps. The best flushing method to use is determined by whether coal seams have been found in previous drill records.
This is by far our most common method of drilling. This can be carried out using either air mist or water/mud flush.
This is an increasingly popular technique of drilling for obtaining windowless samples in soil, over burden and made up ground.
This is an effective method of drilling which can be carried out using air mist or water/mud flush and is commonly used for tasks such as detecting coal or even historically mined coal.
Our Putzmeister SP11 mixer is a single axle, road towable, stand alone high pressure grouter.
A typical water well can vary from 30m to 80m but can go much deeper depending on water tables.
An integrated system, offering an innovative solution to undisturbed soil core sampling, groundwater sampling and monitoring.
Site investigation is the initial process we carry out to collect and assess data.
Drilling is required to the suitable depth of the specific site. Typically raging from 100m – 150m.
Our diamond drilling services cut holes quickly and cleanly from 50mm to 300mm diameter and to various depths using barrel extensions. We can core through reinforced concrete, brickwork, stonework, block and asphalt. We use Xcalibre core machines and also hand held which are also ideal for confined spaces, all with a water feed to ensure a clean, dust-free environment.
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