Tower of London - Pile Cap with RC Beam

Historic Royal Palaces
London, England

Undertaking Structural Underpinning Works For A Neighbouring Building Within The Tower Of London Grounds For Historic Royal Palaces, We Provided Ground Screw Technology To Offer Robust Support To Existing Foundations, Complemented By A New RC Beam With A Pile Concrete Cap In A Challenging-To-Reach Basement.

The challenge

The project presented unique hurdles due to restricted access and stringent load requirements, as outlined in the structural calculations. Our client encountered limitations, as conventional foundation excavation and spoil extraction wouldn’t be feasible.

The solution

Following a thorough site investigation and compression load testing – in collaboration with our third-party engineering partners and our client’s consultancy – we specified and installed 37 extendable hot dip galvanised ground screws measuring 89mm x 2300mm. This allowed us to reach the design verification load in a confined space with extremely limited access.

To address the challenges of transporting fixed-length Ground Screws with a 2.3m requirement into the basement, we opted for a flexible, extendable system, utilising smaller sections, proved instrumental in delivering an effective solution.

daniel webber

10:39 21 Nov 23

I have been using The Ground Screw Centre for supply of ground screws for our Garden Room business (Garden Customs) for a number of years, they are always really helpful and able to accommodate our requests. the products are very good and we have never had any problems with them. would highly recommend..

Alan Joseph

07:15 13 Sep 23

Really impressed with the product and ease of installation. The service was excellent, with a very fast turnaround time. Will recommend again and again

S Cunliffe

14:13 26 Jul 23

I used the 750mm ground screws from The Ground Screw Centre to build the base for a garden office, as the garden was on a slope and I wanted to avoid concrete. I was very pleased, not only with the service from GSC but also the quality of the screws. They are well built, and fairly easy to install (you might need the ratchet if doing a large number). It only took about 3 hours to install all 20 ground screws, but it took another hour or so to get them all level across the timber base. Once the frame was mounted all the ground screws were sharing the weight.

Rosemary Hayward

13:24 09 May 23

Very straightforward and easy to order. Help to select correct fittings was given. Delivery was ahead of time and all correct. Installation was straightforward using the rented ratchet tool. An excellent product, good to install and does the job 👍👍 In no time at all my workshop/studio was on the way to completion. Would highly recommend using ground screws and would certainly use again.

Derek Blyth

13:07 24 Apr 23

Good product, helpful staff, deposit returned, no problems.

Nick Miles

05:29 05 Mar 23

Very positive experience with this company. Great communication from Pav in the office, nothing was too much trouble with some of the changes I wanted to make and the installation team were excellent, tidy, communicated throughout the job, which they did when they said they were going to do it. Really happy with my base for the new gym and highly recommend this company

Jackie Wheatman

12:31 21 Nov 22

I do not often leave reviews but on this occasion, I felt that I should because I think the service and product provided by The Ground Screw Centre was excellent. In the first instance I was attracted to TGSC because they offered a trial service; 1 ground screw, bracket and the rental of the ratchet tool. I was not sure that I would be able to get the screws into the ground. I did and the trial set gave me the confidence to proceed with the project.I ordered the remaining brackets and screws and they arrived promptly. I then found that I had ordered the wrong size brackets. I rang TGSC and the replacement brackets arrived the next day special delivery and at no extra charge. I just had to return the wrong brackets once I had finished with the rental tool. BTW anyone thinking of this should definitely get the ratchet tool. All the ground screws are now in place with a sub-base built ready for my new log cabin. The alternative of a concrete base would have been significantly more difficult to do due to access and a slope to the ground, and I expect significantly more expensive.Excellent Customer Service and a very good product

Applications

Tower of London – Pile Cap with RC Beam

The challenge

The solution