: Anandro Amellonado. Alternatives of Dredging Method Based on Interpretation of Soil Investigation in The North Kalibaru Project

Transcription

1 Author Site Supervisor School Supervisors Reader : Anandro Amellonado : Jan Willem Markvoort : Michiel Parlevliet, Dyah Iriani : Eric Boer Alternatives of Dredging Method Based on Interpretation of Soil Investigation in The North Kalibaru Project

2 CONTENT INTRODUCTION METHODOLOGY WEEKLY PRODUCTION OF THE EQUIPMENT DREDGING METHODS CONCLUSION 2

3 INTRODUCTION NORTH KALIBARU PORT EXPANSION Client : IPC ; Main Contractor : PP Deepening port, expanding and deepening access channel Reclaiming land for the new container terminal area OBJECTIVE to figure the most effective dredging method in The North Kalibaru Project SCOPE Example to calculate weekly production Focus on basins and jetties Rough volume calculation Without slope stability Comparative study 3

4 INTRODUCTION Location 4

5 INTRODUCTION source : 5

6 INTRODUCTION source : internal memo 6

7 INTRODUCTION source : internal memo 7

8 METHODOLOGY 8

9 METHODOLOGY 9

10 METHODOLOGY INTERPRETATION VOLUME CALCULATION Volume Contour.pdf SPT Value Strength Interpretation 0 < N < 4 Very soft to soft Soft 4 < N < 15 firm to stiff Medium 15 < N > 30 Very stiff to hard Hard : area * thickness of layers 10

11 METHODOLOGY EQUIPMENT 11

12 METHODOLOGY PRODUCTION RATE Equipment BULKING FACTOR Weekly Production Rate (in situ m 3 /week) Soft Medium Hard Grab 50,000 50,000 20,000 TSHD 370, , ,000 CSD 400, ,000 91,000 Bulk factor Strength Soil Grab Equipment CSD TSHD Hard Clay/silt Hard Sand Hard Claystone 1 1 Medium Clay/silt Medium Sand Soft Clay/silt Soft Sand

13 WEEKLY PRODUCTION DIONE Parameter Duration Note Shifting and anchoring 30 min Lowering Grabbing Hoisting 115 min Putting to the barge Change Hopper 10 min Total 155 min Cycle production OH/week = produced load / cycle time = 900 / 155 * 60 = m 3 /OH = 150 h Weekly production = * 150 = 52,258 m 3 /week the minutes are calculated to make one barge full 13

14 WEEKLY PRODUCTION 14

15 WEEKLY PRODUCTION TURNING AMOUNT OF TURNS = TOTAL TRAIL LENGTH NEEDED / TRAIL LENGTH DISCHARGING Cycle production OH/week = produced load / cycle time = 25,566 / 318 * 60 = 4,817 m 3 /OH = 145 h Weekly production = 4, * 145 = 698,593 m 3 /week 15

16 WEEKLY PRODUCTION 16

17 WEEKLY PRODUCTION 17

18 WEEKLY PRODUCTION CUTTING PRODUCTION ESP = f * cohesion *cohesion factor Q cut d = v h * T = P/ ESP deformation rate = v cut / d 18

19 WEEKLY PRODUCTION 19

20 WEEKLY PRODUCTION 20

21 WEEKLY PRODUCTION 21

22 WEEKLY PRODUCTION Production Q [m 3 /h] Suction Production 1,646 Cut Production 1,440 Haul Production 916 Production = 916 m 3 /h OH/week = 150 h Weekly production = 916 * 150 = 137,400 m 3 /week 22

23 DREDGING METHOD INTERPRETATION OF SOIL INVESTIGATION 23

24 DREDGING METHOD Example of volume calculation Interpretation of Basin E Soil Layer (+/-) Area below reference Volume dredged From [m] To [m] [m] [m 2 ] [m 3 ] SOFT Clay/Silt ,576 Clay/Silt ,019,695 Clay/Silt ,207, Sand ,811,817 MEDIUM Clay/Silt ,363 HARD Sand ,515 Total 7,488,844 24

25 DREDGING METHOD DREDGED VOLUME 25

26 DREDGING METHOD OPTION 1 Without CSD One Hopper, two grabs Jetties only by grab Suitable as sand blanket s foundation Storage capacity of Option 1 Reclamation area Area Average depth m LWS Volume [m 3 ] Container yard 1B 1,700, ,698,491 Disposal A 525, ,175,274 Disposal B 1,148, ,190,961 Extra sand is required 26

27 DREDGING METHOD From [m] Example of bulked volume To [m] Basin B (North Part) Strength Soil Equipment Bulk factor Dredged volume [m3] Total bulked volume Overview of Option 1 : Overview option.docx Dumping area Bulked volume dumped [m3] Soft Sand Grab 1 144,128 Disposal A 144, Soft Clay/silt Grab ,260 Disposal A 79, Soft Clay/silt TSHD ,553 Offshore dump 968, Medium Clay/silt TSHD 1 240,213 Offshore dump 240,213 Total 1,076,152 1,431,763 Equipment Bulked Volume [m 3 ] Hard Medium Soft Total Grab 1,210,920 1,680,875 9,783,542 12,675,337 CSD TSHD - 1,439,246 10,816,063 12,255,310 Total 24,930,646 27

28 DREDGING METHOD OPTION 2 CY 1B until final level One grab, one CSD, one hopper Jetties only by grab Less suitable as sand blanket s foundation Storage capacity of option 2 Reclamation area Area Average depth m LWS Volume [m 3 ] Container yard 1B 1,700, ,948,803 Disposal A 525, ,199,860 Disposal B 1,148, ,429,968 Extra sand is not required 28

29 DREDGING METHOD From [m] Example of bulked volume To [m] Basin E Strength Soil Equipment Bulk factor Total bulked volume Volume dredged [m3] Overview of Option 2 : Overview option.docx Dumping area Bulked volume dumped [m3] Soft Sand CSD 1 1,811,817 Disposal A 1,811, Soft Clay/silt CSD ,576 Disposal B 543, Soft Clay/silt TSHD ,019,695 Offshore dump 4,680, Soft Clay/silt CSD ,207,878 Disposal B 2,717, Medium Clay/silt CSD ,363 Container yard 1B 645, Hard Sand CSD 1 845,515 Disposal A 845,515 Total 7,488,844 11,244,136 Equipment Bulked Volume [m 3 ] Hard Medium Soft Total Grab 365, ,235 4,143,412 4,955,052 CSD 845,515 4,077,896 10,067,340 14,990,751 TSHD - 231,311 9,864,298 10,095,609 Total 30,041,412 29

30 DREDGING METHOD OPTION 3 CY 1 B only by grab Two grabs, one CSD, one Hopper Jetties only by grab Suitable as sand blanket s foundation Storage capacity of option 3 Reclamation area Area Average depth m LWS Volume [m 3 ] Container yard 1B 1,700, ,698,491 Disposal A 525, ,199,860 Disposal B 1,148, ,429,968 Extra sand is needed 30

31 DREDGING METHOD From [m] Example of bulked volume To [m] Jetty 1A Strength Soil Equipment Bulk factor Total bulked volume Volume dredged [m3] Overview of Option 3 : Overview option.docx Dumping Area Bulked volume dumped [m3] Soft Clay/silt Grab ,540 Container yard 1B 487, Soft Clay/silt Grab ,635 Container yard 1B 588, Medium Clay/silt Grab ,446 Container yard 1B 299, Hard Clay/silt Grab ,316 Container yard 1B 41, Hard Sand Grab 1 20,584 Container yard 1B 20,584 Total 1,233,521 1,437,903 Equipment Bulked Volume [m 3 ] Hard Medium Soft Total Grab 365, ,235 7,890,778 8,702,419 CSD 845,515 3,050,573 3,307,651 7,203,739 TSHD - 808,459 11,023,716 11,832,175 Total 27,738,333 31

32 DREDGING METHOD Time consequence is the most important aspect in this project Planning.xlsx 32

33 CONCLUSION No. Parameter Option 1 Option 2 Option 3 1. Equipment 2 Grabs, 1 Hopper 1 Grab, 1 CSD, 1 Hopper 2 Grabs, 1 CSD, 1 Hopper 2. Working weeks of each equipment [weeks] OPTION 2 IS CHOSEN 1 st Grab :138 2 nd Grab :125 TSHD : 32 Grab :97 TSHD :22 CSD : 43 1 st Grab :93 2 nd Grab :80 TSHD : 28 CSD : Termination of the dredging December 2015 March 2015 February 2015 work 4. Total bulked volume [m 3 ] 24,930,646 30,041,412 27,738, Total capacity of dumping area 13,064,727 20,578,631 16,328,319 [m 3 ] 6. Dumped volume to offshore 12,255,310 10,095,609 11,832,175 [m 3 ] 7. Extra sand to the final level required not needed required 8. Foundation for the sand blanket suitable less suitable suitable 33

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