Constructive Evaluation has a team of experienced Geo-Environmental specialists, able to provide full Contaminated Land assessments or soil screening as necessary to fulfil the requirements of construction projects and to satisfy the planning process.
CE were instructed to assess the ground conditions underlying a pub in the east of Hastings. Upcoming renovation works require scaffolding which will be supported by new foundations. The pub, which dates to the early 18th century, included a basement level with restricted access down narrow stairs, therefore the investigation took place from the ground floor.
Following the removal of floorboards, and the flagstone of the basement floor, the rig was hand manoeuvred over the required location and connected to a hydraulic power pack left outside. The local geology is granular and so casing was required in order to prevent the hole collapsing during soil extraction. Initially, three casing lengths were joined to span the gap between the ground floor level and through the basement to 1.00mbgl; with each metre drilled, a new length of casing was added. In this example 6.00m depth was achieved, or 4.00m from the basement level, with in-situ Standard Penetration Testing at 1.00m intervals.
Our Archway Light Weight Competitor Dart rig can be demounted from its tracked base for locations where access won’t allow for a fully tracked unit, and powered by a petrol/diesel power pack or a 110v/32amp electric source. Depending on the soils encountered, with the option of five 1.00m lengths of casing we can achieve depths of between 6.00-10.00mbgl.