THE EVOLUTION OF SURVEY MARKING AND PEGGING

Transcription

1 THE EVOLUTION OF SURVEY MARKING AND PEGGING 1

2 The underground network situation in France The French territory is covered by 2,5 millions kilometers of underground networks and 2008 have been tragic years since 4 severe accidents occurred in Niort, Bondy, Noisy-le-Sec and Lyon. 2

3 February 2008 A gas leak in Lyon during trenchless works resulted in the death of a fireman and 40 injured people 3

4 October 2008 Tragic damage on underground network in Bondy 1 death, 4 people injured. 4

5 In Ghislenghien Belgium, on July 30th 2004 a gas explosion caused 24 death and 132 injured. Million Euros wasted in human and financial loss 5

6 In 2008 : an average of 17 damages per day have been recorded on gas networks About to damages to underground networks are recorded per year 6

7 Landsurveyors can definitely play a role. 7

8 The French government s action plan DT DICT (PR NF S70-003) the French new standards for underground works 1. An official request must be done to evaluate the underground networks position before any job can start. 2. If a minimum of a 40 cm precision of the network s position can not be proven. Further investigations become mandatory. The job sight must be radar scanned. The ground will have to be properly marked before the intervention of the construction company. 3. all new underground networks must be georeferenced. 8

9 How marking and pegging are done today? 9

10 Standard color code Norme NF P

11 A variety of colored nails to match the requested standard 11

12 Benchmarks Wall rivet or colored nail fastening system 12

13 Traceability The marker is reserved to one organization With a unique engraved number the marker can relate to a database Thanks to the marker, the author of a polygonal is quickly found 13

14 How underground networks are described on the field today? Examples 14

15 Identification of the presence of a High pressure gas pipe with survey nails 15

16 Spray paint identification 16

17 Plastic pegging on a rural site 17

18 Warning grid 18

19 On the field HTA Installation of a high-voltage line crossing low- voltage network R1 : under electrical box N 73 R2 : center concrete pole N 76 R3 : under front door N 76 End of the line, location of the future junction box 19

20 Street Map Câble HTA Description of the job done by the construction company 20

21 Feno new intelligent marker to stop digging blindfolded 21

22 The 1st smart landmark Unique Interactive Secured i-mark is a trade mark from

23 Two options RFID Tag The microprocessor is passive, no source of energy - Unique registration number -4 Kb of memory -ISO Standard For rural purpose Standard Feno marker s head with embedded RFID tag for rural purpose For urban purpose High resistance plastic washer with embedded RFID tag for city purpose 23

24 The I-MARK range - Survey marker s embedded RFID tag head with - RFID TAG embedded in high resistance plastic landmark Strongly fastened with our three prongs anchors Fastened with Wall rivet or Survey nail Tarmac Concrete 24

25 Reading procedure For rural purpose RFID reader Handheld field controller Radio Frequency For urban purpose 25

26 Example of stored data The data are stored in the I-Mark according to your needs file Underground network directory Electricity Gas Water data Nature Depth Coordinates Pressure Diameter The electronic file of the I-Mark is secured. Reading and writing rights are defined to allow private and public information. 26

27 ème Repère intelligent 2 Implementation on the triangulation field 27

28 The i-mark is fastened under the electric box Case study A high tension power line crossing the low voltage network 28

29 Remember Yesterday Today 29

30 FENO I-Mark A mini GIS to prevent damages on the field 30

31 Merci de votre attention QUESTIONS - REPONSES 31

32 32

33 N 395 du 11 mars 2011 Le repère RFID permet de connaître sur le terrain les informations relatives aux réseaux souterrains Le marqueur RFID est un clou, un repère mural ou une borne contenant une puce RFID Il pourra être placé parmi lesrepères géo référencéspour matérialiserl un des points dans une triangulationet contenir les données 33

34 N 395 suite La puce est conçue pour mémoriser des informations relatives aux réseaux souterrains.l accès à la puce est sécuriséet conditionné par des droits de lecture et d écriture. La lecturedes informations s effectue en tempsréelet permet d obtenir des renseignementssur les réseaux à proximité comme: 1. La position géo référencée du réseau. 2. Les caractéristiques du réseau (dimensions, matière, type) 3. La position des accessoiresdu réseau(vannes de coupures, boites de jonction) 4. Le marqueur RFID permet de limiter les sondages préalables en offrant une connaissance des réseaux in situ. Il peut s avérerprécieux au cours des interventions d urgence. 34

35 N 395 suite et fin Lafonctionmatricule, identifie l'objet par un numéro unique. Il devient identifiable et peut être contrôlé La fonction traçabilité, définit la nature, le type et les caractéristiques des réseaux La fonction géolocalisation, pour indiquer une distance par rapport à un objet. On retrouve sur un même support une mesure relative triangulée, et une mesure absolue géo référencée La fonction consultation donne accès aux informations consignées dans le marqueur La fonction maintenance et surveillance des réseaux, pourle suivi des interventions directement sur le terrain Les principales fonctions du marqueur RFID de surface concèdent un gain de temps sur le terrain 35