construction and technical aspects of brownfield regeneration
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Construction and technical aspects of Brownfield Regeneration. Barbara Vojvodíková, Filip Khestl, Tereza Murínová. - PowerPoint PPT PresentationTRANSCRIPT
Construction and technical aspects of Brownfield Regeneration
Barbara Vojvodíková, Filip Khestl, Tereza Murínová
„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.“
Awareness
• Which technical aspects we should pay attention to?• What can be read up from various map data and why
it is necessary to know it?• Which information we need to get for objects on
brownfields and why?• Why we have to pay attention to the ownership
structure?
Goals of the teaching unit
• Present various technical aspects of regeneration• Explain what can be encountered on a brownfield
site• Explain how to mitigate risk of unpleasant surprises
by choosing the right approach• Which types of objects we may find on brownfields• How to can we assess or diagnose them• What is potential future utilization of these sites
Content
• What 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
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 ...
Office building – coal mine Odra – Ostrava (CZ) 2004 2010
Photos by B. Vojvodíková
Office building – coal mine HeřmaniceOstrava (CZ)
2001 2010
Photos by B. Vojvodíková
Production halls and buildings
Figure 2 – Ostrava – Přívoz, CZ - 2004
Figure 1Ostrava Trojice valley-2001
Figure 3- Volos, Greek - 2000
Photos by B. Vojvodíková
Towers and chimneysFigure 1- Bismarc. Gelsenkirchen Germany 2011
Figure 2 – Alexander, Ostrava. CZ- 2011
Figure 3 – Zlaté Hory - CZ2011
Photos by B. Vojvodíková
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
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
Networks - sewerage, electricity, waterFigure 1 - Schwartze Pumpe, Germany - 2011
Figure 2 - Horní Suchá, CZ, 2008
Photo by B. Vojvodíková
Photos by J. Lipner
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
Picture by J. Novosák
Significance of cadastral map for identification of ownership
Owners of former coal mine Heřmanice
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.
Information to seek about 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
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.
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.
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.
Examples of old constructions
(even this can be a brownfield)
Old church in Ústí nad Labem Předlice – CZ- 2012
Photos by B. Vojvodíková
Examples of old constructions
Old castle – Český Rudolec- CZ - 2011
exterior
interior
Photos by B. Vojvodíková
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
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)
Ultrasonic impulse method
Sound relay measurement on constructions (propagation speed is being measured)
Photo by F. Khestl
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
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.
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.
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
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.“