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Civil Infrastructure

Montrose Harbour Berth’s Wall Installation | Trench Control Ltd

November 20, 2018/in Civil Infrastructure /by GSI Editor 1

Project Title

Berth 7 & 8 Combi Wall Installation | Trench Control Ltd

Location

Montrose Harbour, Angus, Scotland, UK

Client

Farrans Construction Ltd

Date

2018

Business Sectors

Infrastructure

Services (Technical Disciplines)

With the existing quay walls in disrepair and not able to take point loadings over 10t, the challenge was to come up with a method on installing the combi-wall tubes & sheets 10m back from the pile line ensuring plant and machinery were not adding stress to existing berths. This meant that standard rig piling works wouldn’t be a solution, therefore, an alternative means of conventional piling was required.

The combi wall consisted of 40m long steel tubes 1219mm diameter approx. 2m tube to tube with infill AZ18-700 sheet piles driven between.

Design and fabrication of a hydraulic gate that would allow tubes and sheets to be installed up to 10m away from the pile line held by the hitch of a 32t excavator. With accuracy being a premium and to design tolerance of 75mm Trench Control Ltd (TCL) enlisted the help of Micro-Hydraulics to devise and a hydraulic self-levelling system which would aid the installation of the tubes and ensure they would be installed plumb and straight.

Project Objectives/ Outcomes

Farrans were appointed the main contractor to install a new combi-wall running the length of the 2 existing berths incorporating tie-back anchor wall and decking piles to form a structural stable berth where ships could dock. The project was to split into 2 phases starting with phase one to install 72No anchor tubes, 34No combi wall tubes with 33No infill AZ sheets and 2 return AZ sheet pile wing walls.

When all 32No tubes had been driven through the gate and impacted to set TCL installed 20m AZ-sheet piles between the tubes to formation level. Some of the sheets required to be impacted to formation level

Geoscience Ireland Contact

Colm O’Raghallaigh – colm@trenchcontrol.ie

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https://www.geoscience.ie/wp-content/uploads/TCL2.jpg 662 1066 GSI Editor 1 https://www.geoscience.ie/wp-content/themes/master/images/geoscience-logo-v1.png GSI Editor 12018-11-20 16:52:242020-01-15 14:39:21Montrose Harbour Berth’s Wall Installation | Trench Control Ltd

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