North East Highlands of Scotland

 Hydrodemolition Project

The project was 400 miles away in the North East Highlands of Scotland

Ammlee Group International received a call on the 2nd of May 2020 at 8:30 am from a client desperate for hydrodemolition on a dry dock wall seal.

Challenge

Previously, the seal was leaking, and the client had poured concrete down it to seal it. This concrete was supposed to be low-strength concrete, but when they tried to remove it, they found it difficult with the jackhammers, and the water ingress was not helping the matter.

On the 2nd of May 2020, Ammlee Group agreed to mobilise the same day to start the work on Sunday, the 3rd of May, as a ship was to arrive the following day.

By noon on Saturday, Ammlee Group had completed the equipment-ready method statement and was on the road to the rescue.

We arrived on site at 7 p.m. Saturday, set up the equipment, and assessed the job. The following morning, at 6 a.m., we started the hydro demolition project. 

We removed the concrete surrounding the H-Girder and cut away the seal.

We could only work up to the water line, so the job was done from a man basket lowered by a crane.

Once we did what we could, which took 3 hours, the dive team took over. The dive team used our equipment to cut the remaining 3m of concrete underwater, which also took around 3 hours.

Once the dive team finished with the underwater hydrodemolition, they had to cut a couple of bars for the H-Girder to be removed.

Once the bars were cut, the H-Girder was pulled up and moved to a secure location so the concrete in the middle section could be cut away.

We used our Hughes UB30 pump at 2600 bar 26Lpm to remove the concrete.

All in all, the job took 16 hours to complete, and the client was extremely satisfied, knowing that his operations wouldn’t be affected, and surprised at how quickly we completed it.

Result

“The gate came out as planned and the vessel was taken straight through, it was a textbook operation, it could not have gone any better. Thanks to the Ammlee team for being a big part of this operation”.

Client: Kishorn Port LTD

Timeframe: 16 hours

Location: 400 miles away in the north east highlands of Scotland

Contract value: £10,000