Segmental Shaft Sinking


Donegan Civil Engineering is a leading contractor in segmental shaft sinking, for shafts of all sizes and depths.


Caisson Shaft Sinking

Jacked caissons can be constructed from 2.40m to 20.00m diameter and by underpinning up to 30.00m diameter. The company has the expertise to construct shafts in all types of ground conditions.

Caisson shaft sinking is the preferred method generally for smaller diameter shafts, especially in poor ground conditions, such as saturated sands and gravels.

Underpinned Shaft Sinking

Generally for shafts larger than 20.00m diameter the underpinning construction method is used, however ground conditions must be suitable, and firm, dry clays and rocks are most appropriate. This method was used for a 25.00m diameter shaft, approximately 12m deep, constructed for Seymour Civil Engineering Contractors / Northumbrian Water at Newlands Court, South Shields.

We own a large range of specialist plant and equipment, and have a vastly experienced workforce and management team.

Contact Us