Port of Durban. Entrance Channel Widening & Deepening Project Completion Function. 31 March 2010

Transcription

1 Port of Durban Entrance Channel Widening & Deepening Project Completion Function 31 March 2010 Presented by: Theunis Steenkamp Project Director Natcor 1

2 The saying goes.. THE JOB IS NOT OVER UNTILL THE FAT LADY SINGS 2

3 The (Fat) Lady arrived on 23 March.. 3

4 The Lady arrived on 23 March.. The Fat Lady has sung 4

5 The Lady arrived on 23 March.. So I guess the job is complete. 5

6 CONTENTS 1 2 Historical Background Reasons for Widening 3 Design Considerations 4 5 Project Team 6 7 Project Statistics 8 9 Repairs: South Bank Access Road Dredging Revetments Pre-Cast Operations & Rock Storage Temporary Sand Supply 18 Project Elements Contract Particulars Detailed Scope Demolition North Bank & North Groyne South Breakwater Old Sub-Aqueous Tunnel Removal Aids to Navigation 6

7 HISTORICAL BACKGROUND

8 HISTORICAL BACKGROUND 8

9 HISTORICAL BACKGROUND 9

10 MAIN PROJECT OBJECTIVES - SAFETY Primary Objective : Safe Navigation Channel Grounding Incidents Number Year 10

11 MAIN PROJECT OBJECTIVES INCREASE CAPACITY Improve the safety of navigation for ships currently using the channel Provide for future generation of ships Design ships : 6600 TEU L = 347m, B= 42.8m, Dr = 14m (Post Panamax) 99% availability 9200 TEU L = 350m B = 45.6m, Dr = 14.5m (Super Post Panamax) 95% availability 11

12 DESIGN CONSIDERATIONS Sand ingress control Wave energy penetration control Life cycle cost Environmental compliance Constructability Allowance for traffic during construction Protection and rerouting of services 12

13 PROJECT SAFETY RECORD Total manhours worked 6.5 million 1 million injury free hours achieved in Jul 2009 Project ended on approx injury free hours Project now 6-months without any incidents 13

14 PROJECT ELEMENTS Elements completed prior to DHEW Project Caissons removed Municipality constructed new services tunnel Elements completed as part of DHEW Project Removal of redundant services tunnel Strengthening of south breakwater Demolition of buildings on north bank Demolition of structures on north bank Demolition of existing north breakwater Construction of new north groyne Construction of new north bank revetment Provision of aids to navigation (temporary and permanent) Undertaking dry excavation and dredging Maintenance of shipping movements Provision of a temporary sand bypassing facility 14

15 PROJECT TEAM Employer Transnet Capital Projects, acting on behalf of Transnet National Ports Authority EPCM Contractor HMG Joint Venture : Hatch (Pty) Ltd, Mott MacDonald, Goba (Pty) Ltd PRDW (Design of Entrance Works and involvement in construction supervision with HMG JV) Main Contractor (Entrance Widening Contract) Dredging International / Group 5 Consortium Primary Subcontractor Subtech T&T Marine Holcim Batch plants and concrete 15

16 ENTRANCE WIDENING CONTRACT PARTICULARS Overall Project Current Total Forecast Final Cost : Approx. R 2.85 billion (excluding new Sand Bypass Scheme) Budget : R billion Entrance Widening and Deepening Form of Contract NEC 3 ECC Contract Option B, Priced Bill of Quantities Entrance Widening Contract Details Main Contract Value : Approx. R 2.23 billion Contract Duration : 150 weeks (Entrance Widening component only) Completion due March 2010 Actual Completion end-february

17 PROJECT STATISTICS North Breakwater and Revetment Breakdown & rebuild m 3 Buildings demolished 12 buildings 20t dolosse fabrication 550 units 5t cubes fabrication units 10t cubes fabrication units South Breakwater Breakdown and refurbish m 3 30t Antifer cubes fabrication units 45t Antifer cubes fabrication units Dredging Total dredged quantity m 3 Main channel m 3 New North Groyne m 3 South Breakwater m 3 Sand Trap m 3 Sub Aqueous Tunnel m 3 17

18 DETAILED SCOPE North Side Demolition of existing buildings Removal of the old services tunnel Removal of existing Quay and Jetty structures Excavation of ±140m behind the structures Removal of existing breakwater Construct new breakwater using demolished/graded/sorted materials and imported quarry rock South Side Raising height of existing breakwater by 2m Increasing the cap width from 9,5m to 11,5m to accommodate construction/maintenance crane Reinforcing sea side with 30t & 45t Antifers Reinforcing and shaping the lee side 18

19 DETAILED SCOPE Dredging Dredge to new depth in inner channel, main channel and outer channel Dredge to expose toe of South Breakwater Dredge footprint of New North Groyne Dredge to expose old sub-aqueous tunnel Sand Trap dredging Continued supply of sand to beaches Channel bottom width increased to approx 220 m Navigation Aids New Breakwater Lights to North Groyne and South Breakwater New 205 deg Marker Temporary and Permanent PEL Light Towers and optics Fairway buoys Old Sub Aqueous Tunnel Removal of old Sub Aqueous Services Tunnel (possible world first) 19

20 REPAIRS TO SOUTH BREAKWATER ACCESS ROAD Storm and resulting damage March 2007 View of South Breakwater Access Road required to be re-constructed following storm damage in March

21 DEMOLITIONS OCTOBER

22 DEMOLITIONS 22

23 DREDGING OVERVIEW 23

24 DREDGING TSHD MARIEKE TSHD dredger Marieke was mobilised and arrived on site in June 2007 Built in 2006 stateof-art vessel Hopper capacity 5,600 m 3 Used to dredge the bulk of the 5,000,000 m 3 in the main channel 24

25 DREDGING UNEXPLODED ORDINANCE Approximate line of new revetment Unexploded ordinance recovered in the drag-head of the dredger Marieke on 24 June and 08 July 07 25

26 DREDGING UNEXPLODED ORDINANCE Approximate line of new revetment 26

27 DREDGING SAND TRAP ON OUTSIDE OF SOUTH BREAKWATER (TSHD Orwell) 27

28 DREDGING EXCAVATION OF NORTH BANK Approximate line of new revetment 28

29 DREDGING EXCAVATION OF NORTH BANK 29

30 DREDGING - BACKHOE DREDGER PINOCCHIO AND BARGES 30

31 DREDGING BARGES TRANSPORTING DREDGED MATERIAL TO DUMP SITE 31

32 DREDGING DISPOSAL AT OFFSHORE DUMP SITE 32

33 DREDGING OSPREY TRANSPORT SHIP 33

34 DREDGING OSPREY TRANSPORT SHIP 34

35 DREDGING DEPARTURE OF DREDGERS ON OSPREY 35

36 DREDGING OFFSHORE DUMP SITE 36

37 DREDGING MAGNETIC ANOMALIES 37

38 DREDGING MAGNETIC ANOMALIES 38

39 DREDGING MAGNETIC ANOMALIES Approximate line of new revetment 39

40 DREDGING - ENVIRONMENTAL MONITORING Initial monitoring sites Plume characterisation sites during New North Groyne pre-dredging 40

41 DREDGING CROSS SECTION OF CHANNEL EXISTING CHANNEL NEW CHANNEL 41

42 OLD NORTH GROYNE Approximate line of new revetment 42

43 OLD NORTH GROYNE - DEMOLITION AND REMOVAL 1. Demolition of concrete cap (approx. Jan 08) 2. Attempted blasting of North Groyne Approximate line of new revetment 43

44 OLD NORTH GROYNE - DEMOLITION AND REMOVAL 3. Removal of root of groyne and armouring (Jul 08) 4. Removal of remaining portion underwater (Aug 08) 44

45 NEW NORTH GROYNE 45

46 New North Groyne 46

47 47

48 NORTH BANK REVETMENT CONSTRUCTION 48

49 NORTH BANK DEMOLITIONS & REVETMENT CONSTRUCTION TUG JETTY FERRY WHARF REPAIR QUAY FUTURE REVETMENT LINE REVETMENT ARMOURING 49

50 NORTH BANK DECEMBER

51 NORTH BANK JULY

52 NORTH BANK OCTOBER

53 NORTH BANK DECEMBER

54 NORTH BANK FEBRUARY

55 NORTH BANK JUNE

56 REVETMENTS SIDE STONE DUMPING VESSEL POMPEII 56

57 REVETMENTS STONE DUMPING Placing 53mm -4.0m CD Approx = 1,375m3 57

58 SOUTH BREAKWATER ANTIFER CUBE STOCKPILE JET PROBES RAISING CAP SAND TRAP DREDGING 58

59 SOUTH BREAKWATER VOID FILLING Large cracks Cap settlement 59

60 SOUTH BREAKWATER VOID FILLING Measurement of voids under cap foundation 60

61 SOUTH BREAKWATER RAISING & WIDENING CAP 61

62 Existing breakwater profile Seabed level Area to be dredged to be able to place units 62

63 SOUTH BREAKWATER ARMOUR PLACEMENT 63

64 SOUTH BREAKWATER ARMOUR PLACEMENT 64

65 SOUTH BREAKWATER ARMOUR PLACEMENT 65

66 SOUTH BREAKWATER WEATHER RISK Future Light to Moderate Overtopping Existing Light to Moderate Overtopping 66

67 SOUTH BREAKWATER WEATHER RISK 67

68 SOUTH BREAKWATER WEATHER RISK 68

69 SOUTH BREAKWATER WEATHER RISK 69

70 PRE-CAST OPERATIONS (SOUTH SIDE) 70

71 PRE-CAST OPERATIONS (NORTH SIDE) 71

72 ROCK STORAGE NORTH SIDE 72

73 OLD SUB-AQUEOUS TUNNEL REMOVAL 73

74 OLD SUB-AQUEOUS TUNNEL REMOVAL 74

75 OLD SUB-AQUEOUS TUNNEL REMOVAL 75

76 AIDS TO NAVIGATION CHANNEL SWITCHOVER PREVIOUS LEAD LIGHTS (STILL IN USE) FINAL PEL LIGHTS TEMPORARY PEL LIGHTS INTERIM CHANNEL CENTRELINE PREVIOUS CHANNEL CENTRELINE FINAL CHANNEL CENTRELINE 76

77 AIDS TO NAVIGATION PORT ENTRY LIGHT Fl R 3s R Alt R/W W Alt G/W G Fl G 3s 77

78 TEMPORARY SAND SUPPLY 78

79 DURBAN HARBOUR ENTRANCE VISIT BY THE QUEEN MARY 2 23 MARCH

80 THANK YOU 80