construction and technical aspects of brownfield regeneration barbara vojvodíková, filip khestl...
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Construction and technical aspects of Brownfield Regeneration
Barbara Vojvodíková, Filip Khestl
„This project has been funded with support from the European Commission. This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the
information contained therein.“
![Page 2: Construction and technical aspects of Brownfield Regeneration Barbara Vojvodíková, Filip Khestl „This project has been funded with support from the European](https://reader036.vdocuments.us/reader036/viewer/2022062407/56649e3c5503460f94b2efc1/html5/thumbnails/2.jpg)
Contents
• What kind of buildings can be found on brownfield sites.
• What information we should collect to get a complete view of a site.
• Construction types and their diagnostics.• Why it is important to consider ownership issues.
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Types of buildings on brownfields
• Office buildings• Production plants and factory buildings• Special buildings - heating plant, waste water
treatment plant...• Towers and chimneys• Roads and railway siding• Networks - sewerage, electricity, water ...
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Office building – coal mine Odra – Ostrava (CZ) 2004 2010
Photos by B. Vojvodíková
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Production halls and buildings
Figure 2 – Ostrava – Přívoz, CZ - 2004
Figure 1Ostrava Trojice valley-2001
Figure 3- Volos, Greece - 2000
Photos by B. Vojvodíková
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Towers and chimneysFigure 1- Bismarc. Gelsenkirchen Germany 2011
Figure 2 – Alexander, Ostrava. CZ- 2011
Figure 3 – Zlaté Hory - CZ2011
Photos by B. Vojvodíková
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Pros and cons of keeping a dominant object on a site
Pros (+)• Object which is architectonically interesting can
serve as a symbol of the place• Tourist attraction• LandmarkCons (-)• Expensive maintenance• Difficult to find meaningful reuse
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Roads and railway sidingFigure 1 – Třinec steelworks, CZ, 2011
Figure 2 - Vitkovice steelworks, CZ, 2009
Photos by B. Vojvodíková
Area of former railway
Area of former railway
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Networks - sewerage, electricity, waterFigure 1 - Schwartze Pumpe, Germany - 2011
Figure 2 - Horní Suchá, CZ, 2008
Photo by B. Vojvodíková
Photos by J. Lipner
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What should be assessed to get enough information about a site (1)
General maps• Historical maps• Town plan, local map• Plan of distribution networks and grids• Land-use limits scheme, Flood plans• GIS resources, Ortophoto maps• Cadastral map
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Significance of cadastral map for identification of ownership
Owners of former coal mine Heřmanice
Picture by J. Novosák
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What should be assessed to get enough information about a site (2)
Specific maps• Map of rainfall (rainfall – runoff relationships)• Culmination flow rates of nearby streams• Nearby boreholes and their interpretation• Environmental audits.
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Information to seek about the objects (1)
General information – focused on construction• Details about the construction of the object• Project documentation• Foundation bearing capacity • Disposition, dimensions, spans – gaps• Materials used• Building services, distribution networks.
Cultural and historical technical heritage
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Further information lowering the risk of unpleasant surprises
Record of usage• Ways of use, processes, modes of productions,
technologies used• Volumes, frequencies • Used substances• Changes in use, end of use (dates)• Accidents, emergencies, sudden deaths, fires, leaks.
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Absolutely essential part of evaluation potential for future use
Information from the site• Walk over • Site visit – assessment of the situation• State of vegetation, animals, colours, smells• Every photograph available• Communication with (former) employees,
employers, neighbours, witnesses• Quality of water in nearby wells.
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Assessment of building constructions
RULE NO. 1:
•Existing older building should always be supposed that its state is worse than it looks at first glance.
•This opinion we can change only on the basis of assessment results.
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Diagnostic methods
Destructive methods • impact on construction• precise methods• (compactness
characteristics, cut probes, etc.)
Photos by F. Khestl
Diagnostics is carried out using destructive or non-destructive methods
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Diagnostic methods• Non-destructive methods
• None or only minimal construction damage • Less precise methods, it is necessary to precise
them by destructive methods (correlation coefficient)
• Recommended for objects of historical value• (visual methods, firmness measuring, electric,
radiation or electromagnetic methods, tensometric tests)
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Ultrasonic impulse method
Sound relay measurement on constructions (propagation speed is being measured)
Photo by F. Khestl
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Demolition
Positive effects• it removes the stigma of past use;• it reduces the structural risks;• it reduces contamination risks;• it may help speed up the development process;• it may prove to be more cost effective (cheaper then
a complex reconstruction);• it may produce higher development values for the
site
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Demolition
Negative effects:• it uproots the historical connections of the location;• it is a costly process, especially where there is a large
amount of material to be dumped;• it is a less sustainable option regarding material use or
reuse (material is carried away and new materials need to be brought on to the site);
• it is a less sustainable with regard to transport; • there are increased accident risks to workers and the
public.
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Why it is necessary to pay attention to ownership
• Single ownership is usually the most favourable situation.
• Usually with an increased number of owners the chance for successful reclamation decreases.
• Shared development objectives are very difficult to realize in the case of a complicated ownership structure.
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Conclusions
• Before start of the planning projects on brownfields an assessment has to be made.
• Various building types represent various risks for their future use
• It is necessary to take into account state of existing constructions and make rational decission about their eventual demolition
• Special attention has to be paid to ownership issues
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Thank you for your attention
http://browntrans.vsb.cz
„This project has been funded with support from the European Commission. This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the
information contained therein.“