What is site investigation?
Site investigation is required to determine the engineering properties of soil and rock and how they will interact with a planned development. The purpose of site investigation is …
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Site investigation
Site investigation is required to determine the engineering properties of soil and rock and how they will interact with a planned development. The purpose of site investigation is to establish parameters for foundation and substructure design; and to assess the potential contamination risks to humans, property and the environment.
Cable percussion drilling
Cable percussion (shell and auger) is the most common drilling method used for geotechnical site or ground investigations in the UK. Depending on access limitations and favourable …
Read moreRotary drilling
Rotary drilling is used to form a deep observation borehole or for obtaining representative samples of rock. The drilling method involves a powered rotary cutting head on the end o…
Read moreTrial pit excavations
Trial pits are used to recover large bulk samples of soil or where thorough visual examination of the strata is required. The principal advantage of this method compared with light…
Read moreWindow sampling
The percussive window or windowless sampling method involves driving cylindrical steel tubes into the ground using a hydraulic hammer. The drilling rig is mounted on rubber tracks,…
Read moreDynamic probing
Dynamic probing involves driving a steel cone vertically into the ground using a sliding hammer and recording the number of blows for each 100mm of penetration. The results obtaine…
Read moreStandard penetration testing
The standard penetration test, commonly known as ‘SPT’, was developed to provide geotechnical engineering properties for foundation design purposes. The test is carried out within …
Read moreCone penetration testing
Cone penetration testing (CPT) involves driving a steel cone vertically into the ground using either a four or six wheeled drive truck or a semi-tracked or crawler mounted rig. The…
Read moreIn-situ or field testing
Altair GES carry out a range of in-situ testing and sampling techniques to supplement our site investigation services.
Read moreGroundwater monitoring
Groundwater monitoring typically comprises the measurement of water levels and the recovery of water samples for laboratory analysis. For highly contaminated sites, groundwater mon…
Read moreGround gas monitoring
When building or developing on or adjacent to brownfield sites, in areas of mine workings, or sites where degradable materials are present within the ground; there is a potential r…
Read moreUnexploded ordnance
Unexploded ordnance (commonly known as UXO, sometimes referred to as UXB) is incendiary weapons (bombs, bullets, grenades, etc.) that did not explode when employed and still pose a…
Read moreCoal mining risk assessment
The Coal Authority maintains information on past and present coal mining in a national database. The information can be reviewed to check if your site is in a high-risk area.
Read moreUnderground cavities
The national databases of natural and non-coal mining cavities held by Peter Brett Associates contain thousands of records of underground cavities of natural and man-made origin. I…
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