Ecologia Environmental Solutions Ltd
Ecologia Environmental Solutions is a specialist Contractor in the investigation and remediation of contaminated land and groundwater with an emphasis on assisting property developers, construction companies and housebuilders reclaim brownfield land, assessing and cleaning polluted waters and attending oil and fuel spills. Ecologia Environmental Solutions also offers specialised support to insurance companies dealing with environmental claims. Ecologia Environmental Solutions provides state-of-the-art remediation services. Our dedicated staff of environmental project managers have extensive backgrounds in both assessment and remediation. We provide a single-source for services from initial investigative phases through geotechnical and geoenvironmental site investigation and remediation implementation to final regulatory compliance and sign off. As a client focussed design-build group, we will inform you of the full spectrum of available remediation options, assess and discuss your needs, and then design and implement the most appropriate solution. We use cutting-edge technology and traditional in-situ / ex-situ treatment systems from design through to implementation and completion. Our corrective action plans incorporate the best available remediation methods.
Dr Giacomo Maini
Building 711 & 712
Kent Science Park
Managed Subcontract Drilling and Installation of Inclinometers, with Grouting of Sonic Tubes: Crossrail Farringdon Western Ticket Hall
Ecologia were approached to assist a geotechnical instrumentation specialist in the drilling and installation of a series of 36m, Casagrande piezometer tipped monitoring wells and a Tube a Manchette at the Crossrail Farringdon West Ticket Hall site.
In addition to drilling works, there was a significant amount of backfilling with pumped bentonite grout to be completed in pre-existing sonic testing holes, which had been cast into the secant walling around two large shafts being sunk within the site.
Because of the requirement to retrieve a full geological profile of the site, Ecologia engaged a subcontractor equipped with Geobore-S wireline coring tools to complete the drilling works, whilst acting in an overseeing role and covering the grouting works, in conjunction with subcontracted crews as required, running all work under the aegis of Ecologia's H&S and quality standards. Core recovery was excellent, even with the complication of gravel beds under the site.
Because of the compact nature of the site, and the need to remain highly mobile, Ecologia used a Weldgrip pump and mixer for the grouting, injecting to depth via 19mm OD disposable tremmie lines, allowing crews to rapidly move between holes with minimum downtime. This was critical to progress, since there were over 80 holes to backfill to depths up to 36m, including several inclinometers. All grouting was completed on schedule because of this approach.
Toward the end of grouting works, damage to a pre-existing inclinometer was identified within the secant pile wall. Unfortunately at this stage, the shaft had already been sunk to a depth of approximately 6m, preventing the use of a conventional drilling rig to clear the hole.
Thanks to Ecologia's careful risk assessment and innovative use of a Dando Terrier rotary head, anchored in place and appropriately guarded, it was possible to clear the hole and reinstall to 26m.
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