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Cleveland Institution of Engineers

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Presentation on theme: "Cleveland Institution of Engineers"— Presentation transcript:

1 Cleveland Institution of Engineers
6 April 2017 Here 2 Deliver for You! TT2 Limited Cleveland Institution of Engineers New Tyne Crossing THE SECOND TYNE TUNNEL 19 October 2010

2 Andrew Coapes TT2 Technical Manager

3 Presentation History and Project Development Contractual Matters
The Works, Project Elements

4 Location Plan 6 April 2017

5 Cross Tyne Study 2-1992 St. Lawrence, St Anthony’s, Walker & St Bede
Study reviewed 4 alignments, St. Lawrence, St Anthony’s, Walker & St Bede

6 TRAFFIC THROUGH TUNNEL
6 April 2017 TRAFFIC THROUGH TUNNEL

7 Feasibility Study Conclusions
Examine alternative means of construct at St Bedes, bridges, bored and immersed tube tunnel. Conclusion two lane immersed tube tunnel was best. Suggested that the project was viable for promotion under the PFI

8 Tyne Tunnel Traffic

9 CROSSING OPTIONS BRIDGE BORED TUNNEL IMMERSED TUNNEL

10 WHY NOT A BRIDGE? “BONGA” FPSO LEAVING THE TYNE

11 BORED TUNNEL Longer More expensive Variable ground risk

12 EXISTING VEHICULAR TUNNEL: AIR LOCK CONTROL

13 GEOLOGICAL SECTION

14 RIVER TYNE BEST SALMON RIVER IN ENGLAND AND WALES A DESIGNATED
RIVER ENVIRONMENT RIVER TYNE BEST SALMON RIVER IN ENGLAND AND WALES A DESIGNATED “INDEX RIVER”

15 IMPACT ON THE COMMUNITIES

16 LENDERS (after syndication)
Contractual Scheme 6 April 2017 SHAREHOLDERS HBOS 41% HSBC TT2 Holdings Co Ltd LENDERS (after syndication) CONTRACTOR BYTP UK GRANTOR TWITA BYTP 18% HBOS 14% HSBC 10% Natixis 14% BBVA 12% IKB 6% BNG % BTMU 12% Co-op 4% Barclays % 100% Project Agreement D&C Agreement Credit Agreement Shareholders Agreement DESIGNERS SUBCONTRACTORS HPR / PB / FM Volker Stevin Halcrow Bachy …… Fairhurst Jan De Nul …… ………… ……

17 Project Agreement THIS AGREEMENT (this "Agreement") is made the 23rd day of November 2007

18 Project Agreement Objectives
(i) building and operating a new tunnel to conform to current safety requirements and refurbishing and operating the existing tunnels to best practice consistent with their construction and listed status; (ii) facilitating the amicable transfer of Transferring Employees to the Concessionaire; (iii) minimising the actual toll level charged to users – including maintaining the current zero VAT rating; (iv) promoting public transport, cycle and pedestrian use of the Existing Tunnels and New Tunnel; (v) procuring the New Tunnel without the need to seek Government PFI Credits or other public sector financial support; (vi) minimising the environmental and social impact of the New Tunnel on local residents and businesses, both during construction and operation; (vii) protecting and promoting the ecology of the Tyne and its tributaries as an important element of the region's environment; (viii) minimising disruption to the operation of the Existing Tunnels during construction; (ix) minimise disruption to the movement of river traffic and the operation of riverside businesses; (x) incentivising the Concessionaire to complete the construction processes as soon as practicable; (xi) allowing flexibility in the Contract Period to facilitate the above objectives; (xii) supporting the Port of Tyne Authority as the road, rail and marine freight hub for the North East region; and (xiii) pro-actively communicating and liaising with all affected authorities, agencies, land owners and communities to foster good relations and understanding of the project and the TWPTA's objective.

19 How does it work financially?
Money in Loans from Bank Revenue from tolls = 2 tunnels Revenue from Tolls = 1 tunnel` 4 years of construction and 30 years of operation TT2 operating and maintenance costs TT2 operating and maintenance costs Tunnel Construction and refurb Repayment of Loans + interest Money out

20 Delivery Challenges Planning conditions Urban environment
6 April 2017 Planning conditions River Tyne (Tunnels) Order 2005 Code of Construction Practice Urban environment Traffic using existing tunnel Consultation with Stakeholders Notification Engagement Dialogue Strategic partnering forum Approvals and consents workshops Public consultation – trust in outcomes Community involvement public art; good neighbour fund Local partnering forums Newsletter Activity diaries Leaflets Website Twitter bulletins VMS Media Drop-in sessions Displays and exhibitions 24 hour helpline TT2 patrol support Councillor briefings Site tours and presentations

21 Overview of Construction Contract
Contract Duration, commence early complete by 2012 Stage 1: Construction of New Tunnel Stage 2: Refurbishment of Existing Tunnel Estimated number of operatives will peak at 500, over 3,000 in total 400m River 1,500m Tunnel 2,650m Project 80+ Direct Subcontractors 20+ Direct Consultants 6,000 drawings (to date) 910,000 m3 Earth Moving

22 Northbound 3.1 km, Southbound 2.6 km
Project Route 6 April 2017 Toll Plaza and North Cut & Cover River Section South Cut & Cover South Junction M&E Works Howdon River Tyne Jarrow Northbound 3.1 km, Southbound 2.6 km

23 Cross Over Existing Tunnel
6 April 2017 Types of Construction Cross Over Existing Tunnel SCL South Portal (Contiguous Piles) North Cut & Cover (D-Walls) Immersed Tunnel South Cut & Cover (D-Walls) South Portal (Box Section) South Portal 2

24 Project Elements Immersed Units Cut & Cover Cross-over Section SCL
Dredging Placing and finishing the Units South Complex Junction Highways North & Toll Booths M & E Services Refurbish Existing Tunnel

25 IMMERSED UNITS

26 6 April 2017 May 08

27 6 April 2017 2/9/8

28 6 April 2017 30/9/8

29 6 April 2017 24/10/8

30 6 April 2017 28/11/8

31 6 April 2017 21/01/9

32 6 April 2017 2/3/9

33 28/5/9

34 11/6/9

35 17/9/09

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38 Cut & Cover

39 Cut & Cover Technique Install diaphragm walls
6 April 2017 Install diaphragm walls Excavate and install props. Construct floor slab. Construct tunnel internal walls Construct tunnel roof. Backfill over and remove props. Achieved

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53 6 April 2017

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62 Cross-over Section

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67 SCL

68 SCL Tunnels – Typical Section

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70 SCL 6 April 2017

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77 DREDGING

78 4 Elements – 90 meters each Jan till June 2009
Caissons Fabrication & Dredging 4 Elements – 90 meters each Jan till June 2009 370,000 m3 Mobilization Nov 2009 Dredged Materials Tunnel Location Caissons Fabrication

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81 DREDGING North transition
Barge DN 18 undertaking initial dredge adjacent to transition structures using crane and bucket Cutter suction Dredger Material next to wall dredged by barge

82 WATER QUALITY MONITORS
6 April 2017

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84 Placing and finishing the Units

85 TRANSITIONS South transition
6 April 2017 TRANSITIONS South transition Front wall demolished and shaft flooded Transition structure complete and access door installed Floor slab behind transition structure complete Rock bund and sheet piled wall in front of transition removed in preparation for dredging Dredging complete Front wall of transition structure and waling beams demolished in preparation for sinking of immersed tunnel units Roof slab Access door Transition structure complete 85

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87 Ballast Tanks 6 April 2017 Jul 2008

88 Inside Immersed units 6 April 2017

89 Float Out 6 April 2017

90 Foundations

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92 Immersion

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94 Sand Bed

95 Seals Omega Gina

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99 South Complex Junction

100 Realigned A185 Howard Street. 1 4 Howard St/Priory Rd Roundabout. 2 6
6 April 2017 1 2 Realigned A185 Howard Street. 1 4 Howard St/Priory Rd Roundabout. 2 6 3 N/B Vehicle Inspection Area. 3 8 5 Straker St Link Road. 4 Loop Road. 5 7 Stricken vehicle area 6 Let the sequence run Grade separation of the local traffic from the mainline via the additional of this feature. Then discuss areas where the scheme has deviated from the reference design, Howard st r/abt – round insterad of previously oval. A185, straker st link road – straightened out Straker st r/abt relocated to assist with the design of the A19 s/b on-slip Relocated south extract building. A19 southern approach road. 7 Straker St Roundabout 8

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109 HIGHWAYS NORTH AND TOLL BOOTHS

110 Vehicle Inspection & Change Facility
6 April 2017 1 Vehicle Inspection & Change Facility New South Bound Toll Plaza area 2 Bus Link 3 Realignment of the A19 Southbound 4 Remodelled North Bound Toll Plaza area 5 Stricken vehicle area 6 Descibe the area Then Let the sequence run A187 Link Road 7

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115 M&E Services

116 Tunnel Fixed Fire Suppression System

117 Tunnel Fixed Fire Suppression System Pumps

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120 Control Room

121 REFURBISH EXISTING TUNNEL

122 Existing Configuration Proposed Configuration
6 April 2017 Existing Tunnel Existing Configuration 2 x 3.65m wide lanes no marginal strips Proposed Configuration 2 x 3.15m wide lanes 0.5 marginal strips 5100 7300 4200 7300 5100 122

123 REFURBISH OF TUNNEL OFFICES

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125 HAVE A PARTY 6 April 2017 Web sites tt2.co.uk newtynecrossing.info


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