The Problem
The detached property in Leicester had suffered significant subsidence from clay shrinkage due to two large, local-authority-owned trees located on the nearby pavement, which were protected by Tree Preservation Orders. Site investigations had already been undertaken and tenders issued for a piled raft foundation for the original house and garage and extensive external and internal reinstatement works. Optera were awarded the job through a competitive tender process and designed a piled raft scheme for approval prior to commencing.

The Optera Solution
Our solution to install 53 piles and a raft amounted to only half the workload. The remaining works included the stripping out and later reinstatement of the kitchen, staircase and ground floor shower room along with associated electrical, plumbing and carpentry works.

Unforeseen ground conditions which had not been identified within the tender documentation meant that we had to redesign the type of pile employed on the project. This was done whilst works were progressing and required a swift turnaround by our in-house design team.

Externally, we removed and re-laid the driveway with a flexible finish. Due to the protected status of the trees and the physical presence of roots projecting through the drive, it was decided that a gravel finish allowed a flexibility which could not be achieved with traditional coverings such as Tarmac or block paving. All exterior cracks were repaired and the front elevation was redecorated upon completion.

Project Conclusion
The job was completed on time and within budget and highlights Optera’s extensive experience and flexibility which enabled us to respond quickly to the unforeseen ground conditions and to offer a revised solution.

“Optera were awarded the job through a competitive tender process and designed a piled raft scheme for approval prior to commencing.”

View or download PDF file