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Contractors World INTERNATIONAL - 2016 Vol 7 No 4

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Used Tyres To Protect Bridges from Ground Movement - continued

Dr Stergios A Mitoulis, Lecturer of Bridge Engineering, Department of Civil and Environmental Engineering at Surrey University told Contractors World International that, at this time, this is a theoretical model. However, they are in discussion with TonyGee Consultants who are looking to apply the idea in one of their future bridge designs.

University & Industry Collaboration

This is a perfect example of how universities work with industry to lead developments that satisfy so many aspects - ecological, environmental, economical, infrastructure development and social.
Developing countries can suffer when vital infrastructures are severely damaged due to extreme ground movement, so this low cost, maintenance free solution to bridges will be of significant interest. It may be possible to further develop the concept to protect river embankments from erosion and protection of bridge piers from scouring.

Many countries also lack the industrial recycling centres that can shred tyres for other applications. As a result, used tyres are simply thrown to the side. More than an eye sore, they pose a potential danger for children and animals as well as collecting water in which mosquito carried diseases can breed.

This is an ecological means of recycling old tyres for which even developed countries will find applications.

Readers may also want to read the article “Economical Design Of Earthquake-Resistant Bridges” and “Earthquake Resistance of Integral Abutment Bridges” that look at other aspects of making integral bridges better able to withstand earthquakes.

CONTRACTORS WORLD INTERNATIONAL thanks Dr Stergios A Mitoulis,Department of Civil and Environmental Engineering, University of Surrey for providing the article and illustrations

University of Surrey

UK Ground Engineering Datasets

UK Ground Engineering Datasets

Mapping the earth you move

The British Geological Survey (BGS) has launched new datasets for informing ground engineering design called ‘BGS Civils’.

The package includes a suite of seven engineering properties for soils and rocks nationwide and has been developed to facilitate desk study screening for ground engineering projects.

Properties of rocks are important in all engineering projects and the new maps provided by BGS Civils will for the first time deliver this information efficiently to those undertaking desk studies. The information will enable planning of focussed specific site-design and will inform engineering geologists and ground engineers at the desk study stage of investigation.

The seven engineering properties for soil and rocks included within the dataset are

  1. excavatability and information on suitable zones for excavation and the local factors controlling it;
  2. strength of geological materials (rocks and fine soils);
  3. discontinuities or any break or change in the rock that could lead to a reduced strength;
  4. bulking or the increase in volume when excavated from its insitu location;
  5. sulfate and sulfide potential in rocks that can give rise to aggressive ground conditions;
  6. corrosivity or the potential for the slow destruction of a solid material by a chemical reaction;
  7. suitability of excavated geological material to be used as engineered fill.

Dr Kate Royse, Director of Environmental Modelling and Product Development, said :

Properties of earth materials are important for all engineering projects and the new data product provides a quick way of getting a generic assessment of the likely ground conditions at the pre-tender and desk study stage.
     This should make tender preparation, planning and execution of ground investigations far more efficient and reduce project overspend. In addition, as Building Information Modelling (BIM) becomes the norm for all UK government procured projects, BGS Civils can be used in conjunction with BIM applications.

The engineering property data will be of interest to organisations concerned with development including utility companies, local authorities, developers and engineering consultants and contractors.

British Geological Society

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