Tilbury CMAT Jetty
Location: Tilbury
Client: Spencer Group
Location: Tilbury
Client: Spencer Group
CapabilitiesCapabilities
- Infrastructures
- Investigation & Testing
- Strengthening & Verification
- Infrastructures
- Investigation & Testing
- Strengthening & Verification
Strengthening and RepairsStrengthening and Repairs
Wentworth were engaged to carry out a full package of investigation and strengthening works on a section of the concrete jetty at Tilbury 2. Following initial concrete testing and analysis, the jetty was found to be understrength to support loads from a new aggregate hopper that was due to be installed. The work, complicated by tides, required suspended scaffolding installation and daily adjustments. Our solution unlocked the full potential of the Port's material handling capacity, increasing production and reducing ship unloading durations. This was done during a 4-month programme of works, with no disruption to the ongoing port activities.
Wentworth were engaged to carry out a full package of investigation and strengthening works on a section of the concrete jetty at Tilbury 2. Following initial concrete testing and analysis, the jetty was found to be understrength to support loads from a new aggregate hopper that was due to be installed. The work, complicated by tides, required suspended scaffolding installation and daily adjustments. Our solution unlocked the full potential of the Port's material handling capacity, increasing production and reducing ship unloading durations. This was done during a 4-month programme of works, with no disruption to the ongoing port activities.
Key ScopeKey Scope
- Investigations works: GPR and ferro-scanning to map out existing rebar. We also carried out material sampling and analysis on both concrete and reinforcing to inform the design of the strengthening solution.
- CFRP strengthening: Design and installation of CFRP wrap and plate to the required beams and slab soffits. The process had to align with tide schedules to ensure correct moisture content and temperature compliance.
- Shear Bolt Installation: Shear bolts were required for additional strengthening to the deck. We carefully mapped out the existing reinforcement then set out all locations to avoid cutting through any rebar. Recesses were created for bolt placement, which were subsequently embedded in resin then stressed to design loads.
- Concrete Repairs: We provided concrete repair to all structural elements damaged from the marine environment.
- Corrosion Control: Galvanic anodes were installed to minimise potential corrosion of the embedded rebar. This required further scanning, marking out rebar steel, and coring holes for anode installation. Anodes were connected in series to form a circuit with rebar connections at the end of each anode string.
- Investigations works: GPR and ferro-scanning to map out existing rebar. We also carried out material sampling and analysis on both concrete and reinforcing to inform the design of the strengthening solution.
- CFRP strengthening: Design and installation of CFRP wrap and plate to the required beams and slab soffits. The process had to align with tide schedules to ensure correct moisture content and temperature compliance.
- Shear Bolt Installation: Shear bolts were required for additional strengthening to the deck. We carefully mapped out the existing reinforcement then set out all locations to avoid cutting through any rebar. Recesses were created for bolt placement, which were subsequently embedded in resin then stressed to design loads.
- Concrete Repairs: We provided concrete repair to all structural elements damaged from the marine environment.
- Corrosion Control: Galvanic anodes were installed to minimise potential corrosion of the embedded rebar. This required further scanning, marking out rebar steel, and coring holes for anode installation. Anodes were connected in series to form a circuit with rebar connections at the end of each anode string.
Key Challenges and SolutionsKey Challenges and Solutions
- Adapting design based on tidal environment: The installation of CFRP process had to align with tide schedules to ensure correct moisture content and temperature compliance
- Concrete Repairs: Due to the marine environment, the structure had suffered significant chloride induced corrosion over time. The remedial solution included hydro demolition to remove defective concrete, with exposed steel then inspected, primed, and prepared for reinstatement. Larger repairs were shuttered and poured with flowable mortars, with smaller repairs hand-packed.
- Accounting for day-to-day live operations and environment factors: This was a challenging project to design and deliver, working over the tidal river Thames on a suspended scaffold adding its own unique complexities, all while working around a live operational aggregate terminal.
- Adapting design based on tidal environment: The installation of CFRP process had to align with tide schedules to ensure correct moisture content and temperature compliance
- Concrete Repairs: Due to the marine environment, the structure had suffered significant chloride induced corrosion over time. The remedial solution included hydro demolition to remove defective concrete, with exposed steel then inspected, primed, and prepared for reinstatement. Larger repairs were shuttered and poured with flowable mortars, with smaller repairs hand-packed.
- Accounting for day-to-day live operations and environment factors: This was a challenging project to design and deliver, working over the tidal river Thames on a suspended scaffold adding its own unique complexities, all while working around a live operational aggregate terminal.