Structural Rehabilitation of a Pumping Station – Municipality of IJsselstein Netherlands

A series of manholes (13 pcs) of the sewage network at the Municipality of Hardenberg suffered internal loss of cross-section due to high levels of H2S Gas present, mainly from an incoming pressure pipeline. In order to avoid further deterioration of the manholes the pressure pipeline was permanently rerouted to another manhole.

Fibrwrap Nederland BV proposed to rehabilitate, restore and extend the service life of these manholes with the application of Tyfo Fibrwrap Systems. This proposal was selected from the Municipality because it provided a durable and cost effective solution with strong and long term protection to (bio)-chemical gasses, substantial decrease of need for future maintenance and significant extension of service life for these structures.

Specifically in all manholes the cross–section was repaired and the newly restored and thoroughly cleaned surface was covered with the specially developed Tyfo HCR (High Chemical Resistance) epoxy coating.

Also for the manhole where the pressure pipeline was permanently rerouted a combination of Tyfo Fibrwrap Systems was applied in order to reinforce, rehabilitate and protect it. The systems used were Tyfo WP epoxy resin as bonding agent for a wet substrate, two (2) layers of Tyfo SEH-25A glass fiber saturated with Tyfo-S epoxy resin for reinforcement of the manhole and finally Tyfo HCR epoxy coating for long protection of the structure.

The whole project was completed in only 9 days with minimal social and economical disturbance for the Municipality and the public.

Rehabilitation of Sewer Manholes – Municipality of Hardenberg, Netherlands

A pumping station, due to exposure of high levels of H2S gas from several incoming pressure pipelines, suffered from concrete surface deterioration. FIbrwrap Netherlands provided a solution for rehabilitation and strengthening of the existing structure with the application of Tyfo Fibrwrap Systems. This enabled the owner to avoid high replacement cost and social disturbance in the long term.

The systems used comprised of Tyfo WP epoxy as primer for wet substrate, Tyfo WS epoxy for restoration of cross-section area, application of Tyfo Glass Fiber SEH-25A with Tyfo S Epoxy and finally Tyfo HCR as coating for protection for the whole rehabilitated surface against H2S gasses. The whole project was completed in only one day proving to be a cost effective solution and with minimum disturbance to the community.

Concrete Pipe Crack Repair – Thessaloniki, Greece.

The Water and Sewerage Company of Thesaaloniki (EYATH SA) experience partial failure on sections of the main potable water networks, which mainly consists from reinforced concrete pipes of large diameter (min. 2,00m diameter).

Fibrwrap Contractors SA (FibrCon) provided a design-build solution, for failing sections of pipeline where longitudinal cracks along the pipe had to be repaired while the network was fully operational. Firstly the cracks were sealed with low pressure injection of polyurethane
resin. Then the pipeline sections were wrapped with Tyfo Fibrwrap Systems of Carbon fiber (SCH) and Tyfo S Epoxy.

All the works were performed with the pipeline in operation and in only 10 days. The client avoided the need to replace failing sections of pipes with the inevitable disruption of cutting down supplying of water to its customers. The Client has assigned to FibrCon SA three projects of this nature.

Beam Strengthening – Vilinius, Lithuania

During construction of a new building a design change was made and subsequently the need for structural strengthening of certain structural elements (T-Beams), in order to withstand additional loads, was necessary.

Fibrwrap Construction Deutschland responded to the demand by providing a Technical solution, through Fibrwrap/Fyfe network, and performed the project after the approval of the Proposal from the client and the owner.

The technical solution entailed the application of Tyfo Carbon Fibrwrap Systems in order to provide additional transverse reinforcement at certain sections of specific TBeams. The Tyfo Carbon composite system used consisted of Tyfo SCH-41 Carbon fiber with Tyfo S-Epoxy and Tyfo Carbon Anchors specially made for this project.

The whole project was completed in 14 days, even though the weather conditions (rain, high humidity) were an obstacle for which Fibrwrap Construction Deutschland had to take additional measures in order to ensure a successful application.

Bridge Strengthening – Marradi, Italy

At this motorway bridge which is located near the city of Marradi, a series of cracks with trend parallel to the direction of the traffic were detected.

It was evident that structural upgrade of the bridge was required due to increased service loads. After the repair works of sealing the cracks it was decided to use FRP systems at the underside of the bridge in order to achieve this goal and also to protect the repaired area.

Fibrwrap Italia used a combination of Tyfo Fibrwrap systems (Tyfo SEH Glass Fibers and Tyfo Glass Composite anchors) and managed to perform the works in only one week. The project was carried out during winter season and measures such as heaters and covering of the application area were used to ensure the success of the FRP application.

The works were executed without any disturbance at the operation of the bridge thus, there was no need to close or alter traffic during works.

Strengthening of Bearing Structure – Athens, Greece

The listed building “Fotinio” was built in the early 1910’s and it was one of the first with reinforced concrete bearing structure. It is a 5-storey building and has 3.000m2 total surface area.

Fibrwrap Contractors SA was contracted to perform repair and structural upgrade works so that the building could be conform to the new building and Seismic Code. The main problem was that, the slabs from level 2 and upwards was failing due to moisture. All slabs and beams were repaired and strengthened with the use of Tyfo Fibrwrap Glass fiber (SEH) systems and Tyfo S Epoxy. The requirement for a minimum increase of dead weight load on existing members made the use of FRP technology to be the logical solution. Also the need for a small time frame
for the repair works was met with absolute success.