Reinforced quay wall historic centre Middelharnis

  • Client Municipality of Goeree-Overflakkee
  • Country The Netherlands
  • Location Middelharnis, Goeree-Overflakkee
  • Status Delivered
Harbour MIddelharnis

Reinforced quay wall for historic centre of Middelharnis The quay walls of the Havenkom harbour basin were no longer adequate. Strukton Civiel conducted research into the history and condition of the walls. On that basis, it divided the quay walls into six sections. The oldest walls were reinforced and restored. One section just required maintenance and a number of short segments were refurbished.

In the Construction Team, we used our design and restoration knowledge to ensure maximum preservation of the existing structures.

Harbour Middelharnis

Focus on the whole context
Besides protecting the listed villagescape, accessibility and safety were also important factors. Residents and businesses contributed ideas for the design, which gives the area a people-friendly character. In consultation with the municipality, we planned the implementation outside the tourist season. And because all the work was performed from the water, restaurants and shops were able to stay open at all times.

Determining the optimal approach in the Construction Team
In the Construction Team, we worked out our proposal to reinforce the quay wall in sections differently. That allowed us to expertly bring together all the municipality’s requirements, local preferences and our in-depth knowledge of design and implementation. Together we had full control over the quality, safety, accessibility, planning, risks and, of course, the historic value from an early stage.
Vibration-free method
The old parts of the quay wall were no longer strong enough. We reinforced them by drilling piles through the existing masonry structure. In a few locations, we replaced the main structure with steel dam walls that we hammered into place from our work vessel. By driving the piles and installing the dam walls from our working vessel, we were able to avoid vibrations. This was the safest approach for the historic buildings in the area.

Dry bricklaying below the waterline
We partly repaired and partly replaced the masonry. We did this below the waterline from a steel dry dock stationed along the quay wall. That meant we didn’t have to lower the water level in the port or build construction pits. So we were able to avoid damaging the historic surroundings. We chose the stone and mortar by testing old materials. For each quay wall, bricks were fired to their original size and colour.
Harbour Middelharnis
We avoided damage to historic buildings, and the pubs and restaurants were always accessible

Fransie van de Tonnekreek, District Manager

Accredited Restoration Company The centre of Middelharnis has historic value and as an Accredited Restoration Company we know exactly how to protect that value. We kept the old quay lines exactly the same. We remained faithful to the differences in materials and restored the old sluice outlets in the walls. We also restored the quay steps that had disappeared. All of the work was based on the appropriate research, design choices and implementation techniques.

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