New Gas Works Concepts: The examples of minimal trenching

14
13 juin 2022 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)

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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. - PowerPoint PPT Presentation

Transcript of New Gas Works Concepts: The examples of minimal trenching

Page 1: New Gas Works Concepts: The examples of minimal trenching

22 avril 2023

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)

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Diapo 219/04/2007 2

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

Improve safety and quality of urban works: with a global approach to the works function

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Diapo 319/04/2007 3

Consideration of the site typology Optimisation of the trench geometry

Suburban or ruralSuburban or rural• Few traffic constraints• Possibility of bringing in large construction

machinery• Few obstacles in the soil

Urban environment Urban environment • High traffic density• Construction machinery adapted to town centres• Large number of obstacles in the soil (particularly

under the pavement)Laying at shallow depth (Gaz de France /ETDE

project)

Placement in narrow trench with recycling of material (DVGW / Gaz de France

project)

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Diapo 419/04/2007 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

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Diapo 519/04/2007 5

Essential aspects of the research project

Comparison of guide lines and required performances in France and in Germany

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Essential aspects of the research project

Treatment of excavated soils for re-employment as backfill material

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Essential aspects of the research project

Long term study of the behaviour of recycled materials

• Study of the « re-excavability »

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Essential aspects of the research project

Quality control ( Q.C)

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Facilitate laying conditions in suburban environment

Definition of technical-economic recycling conditions

Narrow trench site – depth according to regulation

Study of self compacting materials based on recycled

excavated materials (Germany)

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Diapo 1019/04/2007 10

Facilitate laying conditions in urban environmentwith new self-compacting concrete in shallow trenches

PATENTED WITH ETDEPATENTED WITH ETDE

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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 neighboursReopen for traffic at the end of the day

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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

AIR DEFENCE

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Diapo 1319/04/2007 13

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)

Knowledge of the soil before the work GIGA and ORFEUS : Two european projects with PCRD to federate the best skills

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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

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