What Are The Different Types Of Ground Investigation?

by | Nov 30, 2020

Knowing that you need a ground investigation is one thing, knowing what type of ground investigation you need is quite another. Here at Borehole Solutions Ltd, we’ve got decades’ worth of industry experience between us. This experience has enabled us to put together a drilling firm that offers virtually every type of ground investigation. We wanted to take a brief look at each and explain when you might need to need it.

 

Trial Pits

Trial pits are an easy and cost-effective way to obtain samples of various kinds, both disturbed and undisturbed. These excavations are much simpler to carry out than borehole drilling alternatives. Trial pits require minimal equipment, save on fuel and transport costs, and can be completed and then in-filled remarkably quickly. These pits are either dug by hand or by a small digger, like a JCB.

 

Window Sampling 

This type of ground investigation is perfect for smaller-scale soil sampling projects. It’s used predominantly in superficial or weathered formations for both geotechnical and chemical sampling works. In spite of being a more economic means of drilling, window sampling still delivers high-quality sample results. Its depth limit of just under five metres means that it tends to be used for fairly shallow substrates and formations although deeper boreholes are possible. Window sampling rigs are able to carry out a variety of testing, including SPTs.

 

Cable Percussion Drilling

With their distinctive A-frame shape, cable percussion rigs are commonplace across the UK. In fact, it’s the nation’s most common form of drilling, and with good reason. Offering versatile performance across both consolidated and unconsolidated superficial formations, this technique more than earns its keep! A hammering bit is attached to a cable that’s then repetitively lowered into the substrate it’s boring through.

 

Rotary Drilling

This method of drilling suits projects, both big and small. Using torque and rotation, a rotary drill bit is progressed through a substrate, boring through the rock. There are various types of rotary (including ‘mud’ and ‘air’ flush) and the technique is used in quarry and mining settings as well as in typical geotechnical settings in which we specialise. Rotary drilling is fast, flexible and incredibly reliable. It’s one of the most common types of ground investigation.

 

Sonic Drilling

Of all the different types of ground investigation, here at Borehole, we think sonic drilling reins king. This intrusive method is clean, quick and incredibly powerful. Suited in particular to overburdened and superficial deposits, sonic drilling works by progressing a rapidly vibrating sonic head downwards through a substrate. Sonic investigations are incredibly safe, when compared with other drilling methods, and more environmentally-conscious. The quicker a job can be completed, the less impact caused on the environment.

 

Our Other Services 

Of course, we don’t just offer different types of ground investigation, we provide much more. In fact, our range of services is just one of the things that sets us apart from other geotechnical firms. Alongside our drilling, we provide rigs for hire, calibration, restricted access drilling, water well drilling, soakaway installation and testing, plate testing, CBR testing, contamination testing, gas monitoring, inclinometer monitoring and more!

 

Contact Us 

So, if you’d like to find out more about the various types of ground investigation services that we offer, then get in touch! Contact Borehole Solutions Ltd today on 01733 200 501 or by emailing us at info@boreholesolutions.com. Why not head over to our Instagram to take a look at some of our previous work?