Impact Geotechnical Latest news

TFL Step Free Access

Thu, 06 Aug 2020 15:16:28 GMT

A Challenging Investigation at Leyton Tube Station

Working with Norton Associates, Impact Geotechnical were commissioned to deliver a complex Ground Investigation to a London Underground station which is due for significant remodelling, a capacity upgrade and conversion to a Step Free Access station.

The step free access scheme is part of the Mayor's Pledge to make the London Underground wheelchair accessible, more information can be found at: https://tfl.gov.uk/travel-information/improvements-and-projects/step-free-access

Spanning three weeks of traffic hours and engineering hours, drilling upon London Underground station Platforms, as well as navigating buried obstructions; our team was able to deliver quality investigation data in a challenging setting and in difficult drilling conditions. Site work involved Cable Percussive Boreholes, Foundation Exposure Trial Pits as well as Modular and Hand Held Windowless Sample Boreholes.

As always when undertaking survey works on London Underground infrastructure, access was difficult and Impact employed a mechanical stair climber to move a modular Cable Percussive Drilling Rig into site to complete the drilling work.

This rig can be broken down to facilitate easier access, but still has the capabiliity to drill to 30-40m depth and recover class 1 samples as well as completing insitu SPT tests.

TFL Deep Tube Upgrade

impact-geo@outlook.com (Rob Marsh) — Thu, 06 Aug 2020 15:10:40 GMT

In-depth Investigations in a Unique Environment.

Working with Norton Associates, Impact Geotechnical were commissioned to deliver combined Structural and Ground Investigations at three London Underground Substation buildings.

Working in the run up to the Covid-19 lock-down, the investigations to the building itself included diamond coring , GPR and electromagnetic ' Ferroscans ' to floor slabs and walls as well as Pull Out testing and measured surveys of structural elements.

For more information on the scheme please click this link: http://content.tfl.gov.uk/pic-20180516-item08-deep-tube-update.pdf

Rig Mounted Jet Wash

Thu, 06 Aug 2020 14:57:52 GMT

Working at the Rig Wash.....

Simple but really effective improvement to our window sampling rig this week, it is now fitted with a 12v mini jet wash.

It has been a great addition for cleaning down after messy sites, washing grit out of the drill tools and cutting down on cross-contamination.