Title Page
Contents
Abstract 7
요지 9
Chapter 1. Introduction 10
1.1. Problem statement 10
1.2. Objective 13
Chapter 2. Types of Dredgers 14
2.1. Introduction 14
2.2. Trailing suction hopper dredger 15
2.3. Cutter suction dredger 19
2.4. Grab dredger 21
2.5. Hydraulic backhoe dredger 24
2.6. Dipper dredger 25
2.7. Water injection dredger 26
2.8. Auxiliary equipments 30
Chapter 3. Application Example 33
3.1. General description 33
3.2. Location of Project 34
3.3. Soil Properties 35
3.4. Optimal configuration of the equipment 48
3.5. Estimation of dredged capacity 51
3.6. Unpredicted situations 53
3.7. Dredging equipments and market condition in China 55
Chapter 4. Conclusions and Proposal 56
4.1. Conclusions 56
4.2. Proposal 58
References 60
Fig. 2.1. The Palm Jumeirah in Dubai (VanOord) 15
Fig. 2.2. The Trailing suction hopper dredger 'Ham318' 18
Fig. 2.3. Cutter suction dredger 'Noordzee' 21
Fig. 2.4. Grab dredger (TGS) 23
Fig. 2.5. Backhoe dredger and barge in U.A.E. 25
Fig. 2.6. Dipper dredger in U.A.E. 26
Fig. 2.7. Water injection dredger 29
Fig. 2.8. Auxiliary equipments for hopper dredering 32
Fig. 3.1. Location of project in China 34
Fig. 3.2. Map of working area 34
Fig. 3.3. Overview basins and boreholes in the port 35
Fig. 3.4. Platform attached to barge 36
Fig. 3.5. Shelby tube sampler sand SPT-cone 38
Fig. 3.6. Very soft, grey, slightly sandy silty clay (BH1 0~0.45 m) 39
Fig. 3.7. Medium dense, slightly sitly fine medium sand (BH3 1~1.45 m) 40
Fig. 3.8. Medium dense, medium coarse sand (BH5 5.0~5.45 m) 40
Fig. 3.9. Stiff very stiff, mottled brown and grey, silty clay(BH2 8.6~9.0 m) 41
Fig. 3.10. Very stiff clay(BH2 13.0~13.45 m) 41
Fig. 3.11. Borehole BH1 43
Fig. 3.12. Borehole BH2 44
Fig. 3.13. Borehole BH3 45
Fig. 3.14. Borehole BH4 46
Fig. 3.15. Borehole BH5 47
Fig. 3.16. Optimal configuration of the equipments 50
Fig. 3.17. Overflow during dredging 53
Fig. 3.18. Damage caused by hard materials 54