PMSA Regional Conference The role of innovative technology and PM in delivery of the Durban Harbour Tunnel.

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1 PMSA Regional Conference 2016 The role of innovative technology and PM in delivery of the Durban Harbour Tunnel. Frank B. Stevens Pr Eng, B SC (Civil), HonFIMESA, FSAICE

2 Shark Protection

3 Nagal Dam Opening

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6 S.A. Water Services Act of 1997 ethekwini Water Services is both The Water Services Authority and The Water Service Provider It is our responsibility to Reach the poor and unreached in an affordable and sustainable manner Run the water and wastewater undertaking in a businesslike manner Conserve water and the environment

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8 Central Wastewater Treatment Works

9 Woodhead Tunnel Cape Town Built in m long 1.7m diameter Table Mountain to Camps Bay.

10 SANCOT Data Base Dam Related 48 Electricity Related 6 Access and Special 39 Hydro Power 8 Railway 219 Road 43 Sewer 52 Water 146 Total 561

11 Location of beach and offshore seawater sampling stations

12 South Breakwater North Pier Bluff Sand hopper King s Battery Outer Caissons Reclaim berth Sub-aqueous tunnel Inner Caissons Shop 17 Quay Port of Durban Entrance Channel, 2003

13 Old Sub Aqueous Tunnel Statistics Design And Constructed By Internal Diameter Of Tunnel Christiani and Nielsen 3,6m Length Of Tunnel 310m Depth Services Housed Inside Tunnel 14m (below low tide mark) Wastewater pipes, 1050dia steel and 750dia stell pipes (70Ml/day) Potable water, Fibre optics, Electricity cables and Naval equipment.

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15 Always new challenges!

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20 Sand Pumping Scheme

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29 Service Tunnel Under New Durban Harbour Channel. Geological Conditions

30 Mahatma Gandhi Rd Sewer: 3D Tunnel Illustration

31 Mahatma Gandhi Road Sewer Extension. M-972M Sewage System Durban Harbour South Africa AVN 1200 TC OD 1505 Tunnel Length: 223m Diameter: 1200mm Project Owner: ethekwini Water and Sanitation Contractor: Coleman Tunnelling Geology: sand, gravel End of Project: 2012

32 Mahatma Gandhi Rd MicroTunnel

33 Preservation of old Point Road Buildings important.

34 Possible Trenchless Projects in SA October 2012 Sea Outfall Technology Seite 34

35 PIPE JACKING October 2012 Sea Outfall Technology Seite 35

36 Pipe Jacking Below Road Separation Control container Bentonite pump Pipe stock Jacking frame Tunnelling machine October 2012 Sea Outfall Technology Seite 36

37 General Trends in Pipe Jacking Increasing Tunnel Depth Increasing Ground Water Pressure Increasing Tunnel Diameter Increasing Drive Length Difficult and Changing Geology

38 SEGMENT LINING

39 SEA OUTFALL WITH HDD. (Horizontal Directional Drilling). Sea Outfall Technology Seite 39

40 HDD OUTFALL CÔTE D AZUR FRANCE. 24 SEWAGE PIPELINE.

41 FACTORS TO CONSIDER TO ENSURE A SUCCESSFUL PROJECT Geotechnical Information based on valid field research in the planning stage Separation & Material Transportation Machine concept according to geology, hydrology and project conditions Navigation to keep the machine on the right track Pipe & Segment Design and quality Supervision of jacking forces (OLC) and development of most suitable segment design Bentonite Lubrication System to minimise friction Control and Steering all data of tunnelling components are integrated in one control unit, visualized on the operator panel Service Operators, spare parts and technical advice

42 Cone Crusher Powerful cone crusher capable of crushing rocks to a pumpable size Reduced wear & tear on the cutting wheel Increased safety and higher production rates can be achieved

43 ACCESS TO CUTTER HEAD UNDER PRESSURE Airlock for operation in groundwater For Segment Lining and Pipe Jacking machines

44 Comparison of 1 000m of 2000 Diam pipe installation at a depth of 12m Open Trench Trenchless Technology Construction Time Working Area ~ m² ~ 900 m²

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46 Theft and Vandalism

47 SERVICE DELIVERY CHALLENGES

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53 Costs per meter Costs per meter Why use Trenchless Pipe Jacking Technology? Development of Costs Comparing Open Trench and Trenchless Technology Installation Depth Volume of Work Trenchless Technology Open Trench with Ground Water Open Trench without Ground Water

54 Existing Infrastructure Increasing Problems of Installing New Utilities Lines - Go Deeper

55 Conclusions : Trenchless technology offers many advantages over conventional. This method ensures safe, timeous and cost-effective results. The choice of the correct technology depends on the geological and operational requirements of the project. The benefits of using trenchless technology in South Africa is still not fully understood by client bodies, consultants and contractors. Seite 55

56 THANK YOU