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MINI-TRENCH TECHNIQUE Esposto Feliciano AMMAN, 19th -21st March 2009 IATT General Secretary

MINI-TRENCH TECHNIQUE Esposto Feliciano AMMAN, 19th -21st March 2009 IATT General Secretary. Why do we choose Laying Techniques with Low – environmental impact?. To meet specific business requirements such as : to develop the broadband network(ADSL, NGN2);

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MINI-TRENCH TECHNIQUE Esposto Feliciano AMMAN, 19th -21st March 2009 IATT General Secretary

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  1. MINI-TRENCH TECHNIQUE Esposto Feliciano AMMAN, 19th -21st March 2009 IATT General Secretary

  2. Why do we choose Laying Techniques with Low – environmental impact? To meet specific business requirements such as : • to develop the broadband network(ADSL, NGN2); • to minimize the costs respecting the environment; • to improve relationship with the local authorities; Advantages of the above technology? • work made easier and quicker; • cost reduction; • minor social and environmental impact;

  3. Sistema propedeutici all’impiego delle tecniche: Georadar La realizzazione di nuove infrastrutture comporta: • il rischio di danneggiamento di quelle esistenti; • la necessità di un’accurata indagine preliminare del sottosuolo. Ciò può avvenire tramite: • strumentazione “cercatubi”; • reperimento di informazioni tramite Aziende/Enti; L’impiego ditecniche di posa innovativerichiede un’indagine del sottosuolo accurata, realizzabile attraverso i sistemi Georadar.

  4. Sistema propedeutici all’impiego delle tecniche: Georadar L’indagine realizzata con sistemi Georadar permette di rivelare in modo non invasivo la presenza e la posizione di oggetti nel sottosuolo, fino ad una profondità di 3 m, sfruttando la riflessione delle onde elettromagnetiche (100-600) MHz. L’apparecchiatura è costituita da: • un’unità di controllo e di acquisizione dei dati; • una o più antenne; Opportuni software permettono di: • acquisire, elaborare ed interpretare i dati; • restituire elaborati grafici (cartacei o elettronici) in pianta e in sezione; • ottenere elaborati cartografici anche tri-dimensionali. La normativa interna Telecom Italiaprevede l’impiego dei sistemi Georadar (Codice della norma: DRATCOPRE98001 del 21/09/1998)

  5. Laying Technology: Mini-trench The mini–trench technologymeansthe construction of an open mini-dig on a very compact sub-soil surface, (5/15 X 30/40 cm), using a special toothed disc trencher. Small-sized machines allow the use of this technology on roads, pavements and curbs. Main work phases : • Excavation with an appropriate trencher; • Debris removal ; • Pipe/cable laying; • Filling; • Easy re-excavation;

  6. 5/15 cm 30/40 cm Laying Techniques: Mini-trench Main characteristics: • Limitated road surface damage • Reduction of Sub-soil débris ; • no subsidence after re-excavation; • Facilitated re-excavation ; • No interruption to car and pedestrian traffic;

  7. Laying Technology: Mini- trench The Telecom Italia Specifications provide for the use of the “traditional” mini-trench with the following laying technology standards ( 15/12/2000):

  8. Laying Technology: Mini-trench Standard Filling Technique:

  9. Laying Technology: Mini-trench Telecom ‘s decision to experiment with non-invasive techniques through the use of innovative materials is due to the increasing interest in the use of new technology in the mini-trench field: • 1DD: OneDayDig • “reduced” mini-trench

  10. 1DD Laying Technique The so called OneDayDig consists of a specific laying technique,. Its innovative characteristics enable: • the simultaneous implementation of the following phases : - trenching , débris removal, pipe laying and maintenance; • the use of a specific innovative coating (mapei) for maintenance;

  11. 1DD Laying Technique Main characteristics : • Small-sized excavation (5 cm X 30 cm); • Implementation in urban and sub-urbanareas; • Synergetic useof small innovative machinery; • Use of anew filling material which also works for surface maintenance; • Time saving: permits worksite opening and closure on the same day.

  12. 1DD Laying Technique • Filling Materialcharacteristics: • Strongresistance to compression (55 N/mm²) and thermal shock; • Quick setting (siutable for vehicles within 1 - 2 hours); • Homogeneous aspect (no damage to pre-existing road surface); • Perfect adhesion to the excavation sides ( “silos” effect); • Easy removal by means of machinery without damage to pre-existing utilities.

  13. 1DD Laying Technique Final Aspect

  14. LayingTechnique: “reduced” mini-trench The Mini-trench Technique uses traditional machinery. Main characteristics: • Reduced-size excavation (5 cm X 30/40 cm); • Innovative filling material.

  15. Mini-trench : Laying Technique

  16. Mini-trench: Laying Technique Comparison with traditional trenching

  17. Laying Technique: Mini-trench Minor visual impact : manholes

  18. Tecnica di posa: Minitrincea

  19. Social-environmental aspects: Saving Percentages A survey carried out by Telecom Italia Lab (*) shows the Saving Percentages regarding the use of innovative technology compared to traditional excavation methods (worksite costs have not been taken into account): (*) according to the environmental impact model elaborated by the Federation of Swedish Industries.

  20. Main social-environmental Aspects • Reduction of excavation works (exploitation of pre-existing works and waste disposal arrangements) • Reduction of heavy vehicle traffic (HGV) • Rapid access to the public area (from days to hours) • Reduced road surface damage and limited deterioration • Reduced road condition impact • Reduced impact and interference to nearby businesses and residential properties • Increased safety for pedestrians thanks to the elimination of open trenches • Increased operator safety • 80% social-environmental cost reduction • 67% reduction in workplace accidents • Reduced damage to pre-existing utilities

  21. Aspetti economici

  22. Economic Aspects : comparison of techniques

  23. Economic Aspects: Comparison of Techniques Real -Life case: recovery of arial cable and laying of copper telephone cable - 30 cp – lain in suburban environment. (approx. 1 km) … owing to the intensity of traffic in the zone, works carried out as pre-establihed on a daily basis… … Completion of road signs and fencing of digging well carried out… … not more than 50 meters of linear work daily… … closure of diggings and re-surfacing by the end of working day The alternative is the Mini-trench which as well as the previously mentioned advantages, allows the working of 250/300 m a day…..

  24. Economic Aspects: Percentage savings 40% - 60% NB: ** oneri compresi nelle voci omnicomprensive “Scavo” e “Posa cavo”

  25. Economic aspects: Percentage saving

  26. Increased familiarity with this technique Increased workload Significant reduction of labour cost Conclusion The final cost benefit analysis demonstrates that the eco- friendly Laying Technique is highly suitable for network development in our country. The main aim is therfore to promote the “culture” of this technique, and above all to facilitate its authorization by local authorities.

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