The UNESCO World Heritage Site Zollverein in Essen is a landmark of the Ruhr area, a monument to industrial culture and a symbol of the transformation of what was once the world's largest coal mine into an attractive location for culture and leisure, education and business. Today, Zollverein stands for an identity-creating culture of remembrance in the Ruhr area and at the same time for forward-looking location development.
The site of the UNESCO World Heritage Site Zollverein covers around 100 hectares. Since the closure of the mine in 1986 and the coking plant in 1993, the buildings and facilities have been successively renovated and prepared for new uses.
The buildings are used as museums, exhibition and event halls, depots, offices and studios. The individual buildings have to meet very different requirements.
One of them is a so-called fan cooler. It is a simple reinforced concrete structure in in-situ and exposed concrete: an open-top cube with 6 cooling areas. These 6 rooms are separated from each other by concrete walls and filled with wooden trickle trays. On the north side there is an upstream concrete basin divided into 4 chambers, approx. 3 meters deep. Here, the cooled water was collected and returned to the coking plant's facilities. The basin is the only component in the above-ground area with bricks 1/2 stone strongly facing and half covered with wooden planks. on the east side, a steel staircase with grating steps and platforms provides access to the upper part of the timber trickle for maintenance. In the north and south façade there are 3 large fans with a diameter of about 3 meters about 1m above the site. The fans were accessible via maintenance corridors made of reinforced concrete cantilever slabs. Basins and cantilevers are enclosed with steel railings. All constructions (supporting structure, staircase, wooden trickle, fans) are badly damaged and urgently need repair.
The basic idea is to access the interior via the existing external staircase. After climbing the approx. 15 m high crown of the building, the visitor is led back down to the upper edge of the sewage system via a new staircase to be built inside the building. From up there, he can see the renewed wood trickle hordes in the 2 middle fields.
It is intended to commission an interdisciplinary working group for the object planning (§43 HOAI) and the structural design (§51 HOAI). Since the service of the structural engineer is only rudimentarily required, the chargeable costs differ accordingly. The scope of services for object planning includes service phases 2-9. The 1 has already been created, but needs to be checked due to the year of creation (2016). The scope of services for structural engineering includes work phases 2-6. See as before.
If it becomes apparent during the quotation phase that the performance profile needs to be adjusted, a corresponding optimization is negotiable according to the Siemon tables. The following services are planned:
Scaffolding of the whole building outside and inside with a weather protection roof, complete dismantling of the wooden trickle trays, pumping out the water, removal of contaminated sludge.
Disassembly of the fans. Concrete renovation of the supporting structure by chiseling and blasting concrete and reinforcement, or steel, reconstruction of the same, concrete application and surface coating.
Repair of brick surfaces. Reinforcement, or, depending on the degree of destruction, renewal of the railings and stairs/steel components.
Upgrading, or, depending on the degree of destruction, partial renewal of the fans. These remain without function after reconstruction.
Creation of a walk-in opening by motorized displacement of fan 3 in the horizontal axis.
Renewal of the wood trickle plant in the middle area (rooms 2 and 5).
Installation of a staircase inside the building.
Installation of a water pump system to demonstrate the cooling water trickle. For a detailed description of the measure, see II.2.4.