Working below the quay

Below the waterline. Episode two: working below the quay. Quay walls, sheet piling, foundations and underwater concrete all age, and most of that ageing happens where nobody can see it.

We go through how deterioration starts, from corrosion of steel sheet piling to erosion and washout behind the wall. We explain thickness measurement: how ultrasonic readings are taken underwater and what they tell an engineer about remaining service life.

We describe how repairs are sequenced, from cleaning and preparation to formwork, grouting and underwater concrete placement, and why the order of work decides the quality of the result.

We close with reporting: photos, video, measurements and clear recommendations an asset owner can budget and plan around.