- Project
- Fleet Street, London
Double excavation in new residential area
Dalmore Mill, Midlothian
Project Overview
| Location |
|
|---|---|
| Sector | Building |
| Products |
Constructing foundations for a vehicle bridge to connect the residents on a new housing development in Midlothian near Edinburgh.
Our solution
With an occupied property sitting just three metres away from the second excavation, our customer product specialist worked extremely closely with Mulholland, both on and off site, to assist in the excavation.
Once the first cofferdam was installed, our engineers’ altered the design of the second Cofferdam to avoid existing services and work around the occupied property. Both cofferdams were approximately 20m x 5.0m x 4.5m deep, using 6.0m long M15 interlocking trench sheets, two levels of Multibrace frame with Heavy Duty mechanical bracing struts.
View Multibrace
However, the second cofferdam had to be modified to accommodate existing foundations and services. The sequencing of construction of the cofferdams resulted in over 200 6m M15 piles having to be on site at the one time.
The design was based on pre-driving the trench sheets before installing two levels of frame, the lower of which could be removed once a suitable concrete base had been cast. As the top frame had been positioned at ground level, this allowed Mulholland to construct the bridge abutments, below this frame.
Get in touchProject images
Related news and projects
Give us a call
For all project specific design and technical enquiries, please contact your local service team
Send us an email
If you want to talk to us about your project, send us an email and a brief outline of how we can help and we’ll be in touch
action@mabeyhire.co.uk
“Our site foreman, Alec Jarret, really appreciated the time spent on site by Mabey Hire to successfully construct the desired cofferdam.”