For geotechnical investigations TGS Building Services Ltd. has the following equipment at their disposal:

A DSB1/3.5 multifunctional drilling rig with mobile office and lab trailer. The rig lives up to his reputation of being a multifunctional rig. The rig is equipped with various geotechnical tools and is also able to drill at any angle and can drill up to 120 metres below ground level. The machine can be used for core drilling, mud rotary drilling and air rotary drilling among others. The mobile office and lab gives TGS Building Services Ltd. the ability to conduct part of the lab tests on site, which especially for bigger projects can considerably lower down time. The specifications of the rig can be found in the following link.

A PAT 301 TP drilling rig adapted for geotechnical work. Originally intended for drilling water, this rig has been fitted with additional tools and equipment optimizing it for geotechnical investigations. While it cannot drill up-to the depth of for example the DSB1/3.5, it is smaller and capable of drilling in hard to access areas.

A pitcher sampler. This is a sampler intended for undisturbed sampling using Shelby tubes. Unlike conventional methods using only the Shelby tube, this method can penetrate and sample in harder formations without damaging the Shelby tube using an outside rotating casing. This means that unless you’re drilling in hard rock or cohesion less formations only one tool needs to be used for undisturbed sampling, considerably lowering downtime on projects. The pitcher sampler involves no percussion whatsoever, guaranteeing undisturbed samples of high quality. The Pitcher sampler can be fitted on both the DSB1/3.5 and the PAT 301 TP, meaning it can be used in difficult to access areas and to a considerable depth.

A wireline core sampler. Unlike with conventional direct core sampling methods, sampling with a wireline core sampler does not require you to trip out the drilling rods every time you take a sample. The separate coring unit is lowered into rotary advanced casings, and when filled can be hauled back up again. This methods is considerably faster and involves less operational costs over conventional methods. The wireline core sampler can be used with the DSB1/3.5 drilling rig.

A SPT unit. This unit is fitted with an automatic trip hammer which means it can be fitted to virtually any drilling rig with a winch. The SPT unit will provide a value for the in-situ bearing capacity of the soil in a borehole. This method is fast and conditions are controlled providing the client with accurate values. The SPT unit can be fitted on both the DSB1/3.5 and the PAT 301.

A manual DPL. A SPT unit provides bearing capacity values for soil in boreholes. The manual DPL (Dynamic Penetration Light) can also provide these values up to 10 metres in depth, but does not need a borehole. This makes it the ideal tool for feasibility studies, reconnaissance and can provide additional information to support and relate the information gathered from boreholes. The manual DPL is a compact stand-alone unit not fitted to a rig, making it possible to perform the test virtually everywhere in soil.

A pocket vane & pocket penetrometer. Bearing capacity and shear strength are easily the most requested attributes for soil. These tools provide an easy method to give initial bearing capacity and shear strength values for any undisturbed sample taken already in the field. Additionally the test can be performed on any suitable soil surface area in for example trial pits. These values can be used when doing a reconnaissance or feasibility study. Additionally they are used to provide comparison values for tests performed in the lab adding to the overall accuracy of the results.