Civil Engineering – Rivers Projects

SANDSTONE ROCK ARMOUR REMOVAL 29th April 2015

SANDSTONE ROCK ARMOUR REMOVAL PROJECT BRIEF To locate and remove a number of 5 tonne sandstone boulders so that the site contractor could complete the installation of a sheet pile retaining wall. On completion of piling works, rock armour was to be reinstated to provide a suitable means of scour protection. RESPONSIBILITIES I was responsible for interpreting the drawings provided by the client and compiling the dive management system which included everything from the sequence of works to be adopted…

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RIVER STOUR SCOUR PROTECTION SYSTEMS 24th April 2015

RIVER STOUR SCOUR PROTECTION SYSTEMS PROJECT BRIEF The installation of scour protection surrounding the cutwater section of a main pier structure spanning the river stour. This project used a pumpable micro concrete mix that was operated from a topside unit and directed into position by the diver. Prior to carrying out the works, we had to prepare the area using hydraulic underwater cutting equipment to clear a number of subsurface obstructions. RESPONSIBILITIES As director of operations and project manager I…

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RIVER AVON SCOUR PROTECTION SYSTEMS 23rd April 2015

RIVER AVON SCOUR PROTECTION SYSTEMS PROJECT BRIEF The installation of eco sensitive scour protection systems around the abutment structure of a main line railway bridge spanning the River Avon. With the site being of SSSI and the land privately owned by the Royalty Fisheries, strict protocol and operating procedures had to be adhered to at all times making this project both ambitious and complex. With rock armour already in situ we were initially assigned to create a mattress formulated…

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COWES INSHORE LIFEBOAT SLIPWAY CONSTRUCTION

COWES INSHORE LIFEBOAT SLIPWAY CONSTRUCTION 26th March 2015

COWES INSHORE LIFEBOAT SLIPWAY CONSTRUCTION PROJECT BRIEF Principle diving contractor to undertake all subsea operations in the construction and installation of Cowes Inshore Lifeboat Station. This project ran over a series of weeks in conjunction with the topside contractor Raymond Brown Construction Ltd with our involvement from inception to completion. Operations included numerous aspects of subsea civil engineering including but not restricted to, dredging, drilling, welding, cutting, grinding, painting/coating, cementing and final fixings. RESPONSIBILITIES Project Manager responsible for all subsurface…

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LINCOLN SHEET PILE CUTTING 26th March 2015

LINCOLN SHEET PILE CUTTING PROJECT BRIEF Phase 2 of this project was to cut underwater using ultrathermic cutting rods burning in excess of 10,000°F at the tip. The sheet sheet piles were installed by the contractor and once piled to the desired depth, each top section was cut at a specified height above bed level. Due to the tidal range at this location some of the cutting works were conducted at low water using oxygen/acetylene therefore maximising our time on…

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TORRY QUAY CONTAINMENT CURTAIN INSTALLATION

TORRY QUAY CONTAINMENT CURTAIN INSTALLATION 24th March 2015

TORRY QUAY CONTAINMENT CURTAIN INSTALLATION PROJECT BRIEF To secure supplied brackets to the wharf exterior which would be used to attach a purpose built articulating containment curtain during excavation works. The brackets were provided by our client and our task was to deploy and install the curtain in situ terminating at each side of the entrance where we had installed the brackets. Once completed excavation works could commence by onsite contractors with the curtain providing sufficient containment of sediment and…

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TRINITY LANDING PONTOON MAINTENANCE 24th March 2015

TRINITY LANDING PONTOON MAINTENANCE PROJECT BRIEF To undertake routine maintenance works subsurface, consisting of surveys, investigations, tightening and replacement of all underwater fixings. All survey works consisted of accurate recording and photography detailing non-conformances which ultimately over a period of time provided a suitable trend analysis of problematic areas. Maintenance routines were developed from the non-conformances and trend analysis with periodic replacement of fixings undertaken bi-annually. Each fixing was correctly tightened using a hydraulic torque wrench both topside and underwater….

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COWES YACHT HAVEN UNDERWATER WELDING & LIFTING OPERATIONS

COWES YACHT HAVEN UNDERWATER WELDING & LIFTING OPERATIONS 24th March 2015

COWES YACHT HAVEN UNDERWATER WELDING & LIFTING OPERATIONS PROJECT BRIEF Tasked to re-weld a number of brackets back onto supporting piles which created a framework for the outer seawall of Cowes Yacht Haven. We designed and fabricated a davit system to raise and support each of the 2.5 ton concrete sections in situ prior to securing back onto the welded brackets. RESPONSIBILITIES I was responsible for initially compiling the non conformance report to the client following the dive teams investigation….

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LOCK MAINTENANCE & CONFINED SPACE PROJECTS

LOCK MAINTENANCE & CONFINED SPACE PROJECTS 11th February 2015

LOCK MAINTENANCE & CONFINED SPACE PROJECTS PROJECT BRIEF To carry out a series of vital maintenance procedures on an existing series of lock gates segregating a private marina from the main river fairway. In addition to these works we were tasked to investigate a series of faults creating reoccurring problems affecting the operational functionality of the lock and jeopardising its future sustainability. One of the suggested solutions was to standardise the existing wheel assemblies with 316 stainless steel shafts and A.B.S…

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ROCK ROLL MATTRESS INSTALLATIONS 11th February 2015

ROCK ROLL MATTRESS INSTALLATIONS PROJECT BRIEF Used as a temporary scour protection measure, our brief was to install a series of rock rolls to form a rock roll mattress that was capable of resisting high velocities and shear stress loads of up to 1200 k/N which equates to around 120 ton-force within a high energy river. This system was temporary but it provided a suitable instant and flexible solution where other bioengineering techniques would be less effective. The rolls were…

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DEFLECTOR PLATE DESIGN INSTALLATION AND DEMOBILISATION

DEFLECTOR PLATE DESIGN INSTALLATION AND DEMOBILISATION 11th February 2015

DEFLECTOR PLATE DESIGN INSTALLATION & DEMOBILISATION PROJECT BRIEF To co-design and fabricate a deflector plate to divert the main flow of water around the team of divers working within a high energy river. The unit was fabricated off site but assembled in situ on the river bank with the trench plates being welded into position both topside and subsurface by my team upon installation of the main steel framework. Pre site surveys depicted the exact location and installation procedures which…

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