The Differences Between Soil Investigation and Geotechnical Drilling

Amongst the wide array of drilling services offered by different contractors, one of the most popular is geotech drilling. There are many applications wherein such will be needed. However, it should be also kept in mind that not all drilling services are the same. Geotechnical drilling, for instance, is different from soil investigative drilling. They may require different approaches and techniques, and most importantly, the end results anticipated will also be different. In the rest of this article, you will learn more about their specific applications to have an understanding of how the two differ from each other.

What is Investigative Soil Drilling?

In the simplest form, investigative soil drilling is all about the examination of the physical and chemical properties of a soil. A sample is drilled within a specified depth and it is studied in a laboratory setting in order to specify its properties. This is geared towards being able to determine what is in the soil and how it can possibly change as a result of the construction or external factors, which is commonly performed by geologists and engineers.

In the case of soil testing, the sampling method is used, which requires the need to mix soil samples from different levels for a more comprehensive understanding of its properties. Some of the properties being looked upon include the moisture content texture of the soil, and the level of the contaminants present in such.

If the sampling job is not going to be too demanding, the drilling contractor can just make use of a backhoe or hand auger. On the other hand, if the samples need to be extracted deeper on the ground, there is a need to use an auger or other advanced machineries with the capability to penetrate deeper on the ground to get hold of the sample needed.

What is Geotechnical Drilling?

On the other hand, geotech drilling is needed to be able to determine the structure of the soil, which will require deeper borings. In this kind of drilling job, the geotechnical drilling contractor would need to make a bore hole, while making sure that there are no significant disturbances made on the soil.

More often than not, this kind of drilling activity is required in the construction of buildings and in being able to find the depth of groundwater. In the past, most of the clients requiring this kind of service needs the result into order to determine soil bearing pressure, position of groundwater table, characteristics of soil layers, and the active soil load, among other things. Some of the most common techniques employed to achieve its purpose include piston samplers and long split spoon.

Choosing Which One Is The Best

It is impossible for me to give you an upfront recommendation on which one is going to be the best. There are different factors that should be taken into consideration, such as the extent of the job and the purpose of such. At the end of the day, the only thing I can recommend is to work with trusted geotechnical drilling companies. They have the expertise needed to determine which type of drilling is going to be more appropriate for your objective.


Environmental & Geotechnical Drilling Services Pty Ltd
38 Thorn St., Pennant Hills, NSW, 2120 Australia
(02) 9119 0576
info@environmentaldrillingservices.com.au
ABN: 42606022002
ACN: 606 022 002

Comments are closed.