Segmental Shaft Sinking


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

We have the capabilities to construct shafts of all sizes and depths, in all ground conditions, by all techniques. Our shafts range from 2.40m internal diameter to 25.00m id by caisson and from 1.50m id to 30.00m id by underpinning.


Caisson Shaft Sinking

Jacked caissons can be constructed from 2.40m to 25.00m 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.

We own a large range of specialist plant and equipment, and have a vastly experienced workforce and management team to deal with any form of shaft construction required.

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