1. TRENCHLESS TECHNOLOGY (TT) IN SMART CITIES
PROF. DR. FEVZİ YILMAZ
Fatih Sultan Mehmet Vakıf University,
Faculty of Engineering, İstanbul
ICSG ISTANBUL 2015, APRIL

2. TOPICS WHAT IS TRENCHLESS TECHNOLOGY (TT)? OUT OF SIGHT OUT OF MIND
TRENCHLESS TECHNOLOGY METHODS
Detection Methods and Assesments
To Go From Trenching To Trenchless
TRENCHLESS TECHNOLOGIES IN ISTANBUL
CONCLUSION

3. WHAT IS TRENCHLESS TECHNOLOGY?
Family of construction techniques for installing or rehabilitating underground infrastructure with minimal disruption to surface traffic, businesses, and residents
Underground building industry has social economical and environmental costs
Underground buildings have 4D facts: Dirtiness, Difficulty, Dangerous, Dust.

4. WHAT IS TRENCHLESS TECHNOLOGY (TT)?
Social Cost
«no dig no risk», «minimum dig minimum risk»
«TT or no-dig=minimal impact to the ground»

5. WHAT IS TRENCHLESS TECHNOLOGY?
An example of open cut and no-dig project area
Trench and / or Trenchless

6. OUT OF SIGHT OUT OF MIND Underground pipe networks / features
> 5 times total length of streets and roads
Not visualized
People neglect their importance

7. TRENCHLESS TECHNOLOGY METHODS
Introduction: Mid-1980s
Trenchless technology methods are divided into four main areas:
Inspection and detection
Construction and installation of new pipelines and utilities
Renewal
Replacement of existing, old, and deteriorated pipelines and utilities

8. TRENCHLESS TECHNOLOGY METHODS
The usage ratio of open cut (trench) and trenchless rehabilitation methods for sewer pipe networks in advanced countries:
However, in Istanbul open cut ratio is much higher than 50 % in rehabilitation projects

9. TRENCHLESS TECHNOLOGY METHODS
DETECTION METHODS AND ASSESMENTS
(Includes technologies for inspection, leak location, and leak detection)
CCTV (Closed-Circuit Television)
Leak detection

10. TRENCHLESS TECHNOLOGY METHODS
GPR (Ground Penetrating Radar with a trolley, a laptop and digital antenna driver).
Others:intelligent TV camera systems, pressure tests, smoke tests, fiber optic gyroscopes, georadar utility search and mapping, and void inspection devices

11. TRENCHLESS TECHNOLOGY METHODS RESEARCH PROGRAMME FOR MINIMISING FOR STREETWORKS DISRUPTION [THE UKWIR ]

12. TRENCHLESS TECHNOLOGY METHODS
TO GO FROM TRENCHING TO TRENCHLESS
From Open Trench to Directional Drilling

13. TRENCHLESS TECHNOLOGY METHODS
HDD (Horizontal Directional Drilling)
drilling a guided pilot hole
forming a flowable slurry
pulling the new pipe (PE,PVC,DI.Steel)

14. TRENCHLESS TECHNOLOGY METHODS
CIPP (Cured-In-Place Pipe)
Stages: 1.old host pipe renewal
2.UV hardening, composite
Micro Tunneling
New installation,
Pipe jacking
Others: Fold & Form (F&F), Pipe Bursting, Pipe Ramming, Coating and Linings, etc.

15. TRENCHLESS TECHNOLOGIES IN ISTANBUL
famous ancient city of the world
around 20 % of the population in Turkey (~13 million)
40 % of Turkish industrial activity
located along the shores of the Marmara Sea and the Bosporus Strait

16. TRENCHLESS TECHNOLOGIES IN ISTANBUL
TT methods (Rehabilitations+Renewals+New Installations) widely used in Istanbul:
Cured-in-place Pipe (CIPP)
Fold & Form (F&F)
Pipe Bursting
Horizontal Directional Drilling (HDD)
Micro Tunneling

17. TRENCHLESS TECHNOLOGIES IN ISTANBUL
CURED-IN-PLACE PIPE (CIPP)
The rehabilitated sewer in front of Hagia Sophia by CIPP methods

18. TRENCHLESS TECHNOLOGIES IN ISTANBUL
FOLD & FORM (F&F)
The rehabilitated sewer example between Sultanahmet Mosque and Hagia Sophia by F&F methods
Stages:1.folded (u-shaped) PVC and HDPE pipe
2.insertion it in the existing sewer
3.rounded by heat (steam) and pressure in existing sewer (tight fit)

19. TRENCHLESS TECHNOLOGIES IN ISTANBUL
HORIZONTAL DIRECTIONAL DRILLING (HDD)
HDD application on Barbaros Street – Beşiktaş
HDD application on Seyrantepe near the TEM

20. TRENCHLESS TECHNOLOGIES IN ISTANBUL
PIPE BURSTING
Pipe bursting application site in Beşiktaş
Stages: 1.old host pipe fragmenting
2.new pipe pulling

21. CONCLUSION
TT is a crucial alternative for the construction, renewal and rehabilitation of pipelines
TT is open to nowel approaches
Trenchless Technologies are major alternative and offer many benefits for protecting historical infrastructures either
The biggest advantage of trenchless technology is prevention of negative impacts of open cut system
Since 2003, renewal and rehabilitation of pipes especially wastewater pipes in Istanbul has been realized with trenchless technology.
In the current situation, the rate of trenchless technology application does not exceed 20 % in Istanbul
!!!! It is necessary to increase the application rate of TT in İstanbul to the levels in developed capital cities of the world

22. THANK YOU AcknowledgementS
Thanks to İSKİ, Hasan Vardar İnşaat A.Ş., Kanaltek Ltd. Şti., AOL İstanbul Ltd. Şti. and Bakır İnşaat Ltd. Şti. for providing data and documents
PROF. DR. FEVZİ YILMAZ
Fatih Sultan Mehmet Vakıf University,
Faculty of Engineering
THANK YOU