Marine and Coastal Structures - Structural Repairs

Marine and Coastal Structures

Coastal infrastructure across the UK is increasingly affected by coastal erosion, storm damage and long-term deterioration driven by rising sea levels and more frequent extreme weather events. Harbours, seawalls, river walls and rail-adjacent coastal assets are now exposed to forces well beyond those originally anticipated at the design stage.

Specialist inspection, erosion control and structural repair of coastal infrastructure.

Structural Repairs provides UK-wide coastal and marine inspection, erosion mitigation and structural repair services, combining structural engineering expertise with specialist marine access capability. We deliver both emergency response and planned resilience schemes in exposed, tidal and aggressive environments.

Innovation: Engineering the Solution

Working in the intertidal zone presents unique challenges. Tides do not wait for concrete to cure, and traditional access often fails. We innovate to extend the working window and ensure quality in hostile conditions.

The “AquaDock” Advantage: Where tidal ranges make jack-up barges too expensive or impractical, we deploy our own modular floating pontoon systems. These provide a stable, heavy-duty working platform that rises and falls with the tide, allowing 24/7 working cycles in intertidal zones.
Underwater Innovation: We have pioneered techniques for the remote application of underwater curing epoxies and carbon fibre using ROVs and diver-led teams, eliminating the need for costly cofferdams or dewatering.

Environmental Jeopardy & Carbon Efficiency

The Climate Threat Coastal infrastructure is on the frontline of climate change. Rising sea levels and the increasing frequency of North Atlantic storm surges present an existential threat to sea defences. The jeopardy is not just physical; the aggressive marine environment subjects concrete to rapid chloride saturation, causing unseen reinforcement corrosion that can lead to sudden, catastrophic failure.

The Low-Carbon Life Extension We advocate a “repair first” philosophy. Demolishing and recasting a failed seawall or harbour quay generates massive amounts of embodied carbon—from the production of new cement to the heavy plant machinery required for construction.

Embodied Carbon Reduction

By opting for life-extension methodologies such as composite strengthening and cathodic protection, we typically reduce the carbon footprint of the project by up to 80% compared to replacement..

Marine-Friendly Materials

We utilise non-corrosive Carbon Fibre (FRP) systems that minimise the transport emissions associated with heavy steel reinforcement.

Habitat Protection

Our floating access solutions prevent the need for environmentally damaging temporary access roads on sensitive foreshores.

Critical Assets We Work On

Harbours & Port Infrastructure

Quay Walls: Stabilisation and repair of masonry and concrete harbour walls.
Slipways: Resurfacing and structural grouting of voids beneath operational slipways.
Marine Concrete: Repair of jetties, dolphins and breakwaters suffering from chloride attack.

Seawalls & Promenades

Coastal Defences: Concrete and masonry repairs to structures subject to wave loading, overtopping and scour.
Void Filling: Pressure grouting to reinstate structural integrity behind walls and beneath promenades.

River Walls & Tidal Defences

Erosion Mitigation: Repair of structures affected by fluctuating water levels and ground instability.
Sheet Pile Repair: Welding repairs and protective coating of corroded steel piling in tidal zones.

Rail-Adjacent Coastal Infrastructure

Critical Assets: Strengthening of highly exposed structures subject to direct wave impact, erosion and loss of support.

Coastal Erosion Control & Stabilisation

We deliver bespoke ground stabilisation schemes tailored to site conditions and exposure levels.

Rock Armour (Rip-Rap): Placement to dissipate wave energy and protect vulnerable structures.
Gabion Basket Systems: Flexible, permeable erosion control and slope stabilisation.
Scour Protection: Critical installation of grout mattresses and concrete toe protection to prevent loss of support at the base of seawalls.
Ground Injection: Consolidation grouting to stabilise retained ground and fill voids caused by washout.

Inspection, Survey & Diagnostics

Understanding the underlying causes of coastal deterioration is essential before effective repair works can be designed.

Detailed Visual Inspection: Close-access surveys of splash zones and submerged elements.
Concrete Condition Assessment: Testing for chloride content, carbonation depth and compressive strength.
Advanced Scanning: Using GPR and Cover Meters to locate reinforcement and identify hidden delamination.
Scour Assessment: Measuring the extent of undermining and ground instability.

Marine Access & Working Capability

Estimator operates its own marine access systems, allowing safe and efficient working where conventional land-based access is not possible.

Aquadock Systems: Modular pontoons for stable working platforms.
Survey Boats: Small craft for inspections in shallow or constrained waters.
Multicat-Style Workboat: Featuring a hydraulic beach-landing ramp for plant loading and an onboard crane for lifting rock armour and materials.

Why Partner with Structural Repairs?

Specialist Experience: Proven track record in coastal erosion control and marine structural repair.
In-House Access: Dedicated marine access equipment operated by our own teams.
Emergency Response: Rapid mobilisation for post-storm inspections and stabilisation.
Bespoke Strengthening: Design and installation of non-corrosive carbon fibre systems ideal for the marine environment.

Defend Your Coastline

Contact our team to discuss your erosion mitigation or structural repair requirements.