1 / 14

New Gas Works Concepts: The examples of minimal trenching

New Gas Works Concepts: The examples of minimal trenching. Franck Groeschl ( DVGW – Bonn) - Hartmut Reichenbach (S&P - Stuttgart) Jean-Pierre Capdevielle ( Gaz de France – Saint Denis) . Improve safety and quality of urban work s : with a global approach to the works function.

cameo
Download Presentation

New Gas Works Concepts: The examples of minimal trenching

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. New Gas Works Concepts: The examples of minimal trenching Franck Groeschl ( DVGW – Bonn) - Hartmut Reichenbach (S&P - Stuttgart) Jean-Pierre Capdevielle ( Gaz de France – Saint Denis)

  2. Improve safety and quality of urban works:with a global approach to the works function • Improve the safety of gas networks • Facilitate identification of existing structures • Improve passive protection of networks • Limit the impact of works for neighbours • Hindrance to traffic (car and pedestrians) • Works duration - Reduce the environmental impact • Reduce the environmental impact • Reduction in volumes of waste • Reduction in borrow quantities • Improve economic efficiency • Direct cost during laying • Indirect cost, reducing risks to third parties

  3. Consideration of the site typology Optimisation of the trench geometry • Suburban or rural • Few traffic constraints • Possibility of bringing in large construction machinery • Few obstacles in the soil • Urban environment • High traffic density • Construction machinery adapted to town centres • Large number of obstacles in the soil (particularly under the pavement) Placement in narrow trench with recycling of material(DVGW / Gaz de France project) Laying at shallow depth(Gaz de France /ETDE project)

  4. Minimal intrusion into roadways while ensuring optimum quality and reduction of costs • Aim of the research project «Minimal Trenching »: • Determine the construction methods for minimal intrusion • Optimise quality assurance for street works and pipe laying Professional guideline with a view to harmonisation of French-German standards

  5. Essential aspects of the research project • Comparison of guide lines and required performances in France and in Germany

  6. Essential aspects of the research project • Treatment of excavated soils for re-employment as backfill material

  7. Essential aspects of the research project • Long term study of the behaviour of recycled materials • Study of the « re-excavability »

  8. Essential aspects of the research project • Quality control ( Q.C)

  9. Facilitate laying conditions in suburban environment Narrow trench site – depth according to regulation Definition of technical-economic recycling conditions Study of self compacting materials based on recycled excavated materials (Germany)

  10. Facilitate laying conditions in urban environmentwith new self-compacting concrete in shallow trenches PATENTED WITH ETDE

  11. A technique in service already tested internationally(Switzerland, U.K.) • 1 km done in narrow trench – 50 cm deep • « Just-in-time & short » site minimising nuisance to neighbours • Reopen for traffic at the end of the day

  12. Knowledge of the soil before the work GIGA and ORFEUS : Two european projects with PCRD to federate the best skills Objectives:to characterise the performances of existing radar systems and develop new systems capable of satisfying user needs

  13. Knowledge of the soil before the work GIGA and ORFEUS : Two european projects with PCRD to federate the best skills • Tests in controlled environment • An environment adapted to performance tests • 20 to 160 mm diameter tubes (PE, steel, cast iron) • 20 cm to 2 meters deep (positioned with precision) • 4 different types of soil (sand, earth, clay-lime, fill) • 2 surface types (coated chippings,soil)

  14. Conclusions with these 3 R&D GERG Projects : Placement in narrow trench with recycling of material + Laying at shallow depth with new self compacting concretes + Optimised GPR to find every distribution networks under the streets Opportunities to use, in Europe, new technologies with evolutions of laying rules for the distribution gas pipes

More Related