Figure 19. Wave overtopping at breakwater head, plan 2 series waves
Table 4
Summary of Stability Experiments
Plan
Main Features
Figure
Photos
Initial Plan
Profiles 1 - 4: 6.25-tonne Tetrapods
Profiles 4 - 6/7: 8-tonne Core-Locs
Profiles 6/7 to head: 11-tonne Core-Locs
Crest: +5 m CD south of elbow
Packing density ( ):
8-tonne Core-Locs - 0.55
1
11-tonne Core-Locs - 0.59
10
A1 through A6
Same as Plan 1 except:
Profiles 4 through 10:
Toe Protection: buttress of 0.75- to 1.8-tonne stone
1A
= 0.60 (8-tonne Core-Locs)
11
A7 through A12
Same as Plan 1 except:
1B
Toe Protection: chain (Profile 4 to elbow)
12
A13 through A16
Same as Plan 1B except:
Toe Protection: anchored chain (Profiles 4 to 11)
1C
= 0.62 (8-tonne Core-Locs)
12
A17 through A22
Same as Plan 1C except:
Crest elevation raised from +5 m CD to + 8 m CD
11-tonne Core-Locs used on entire structure
Toe Protection: Single row of 11-tonne Core-Locs
2
= 0.62
13
A23 through A27
Same as Plan 2 except:
Toe Protection: Toe trench with 45-deg bevel
2A
= 0.61
14
A28 through A33
Same as Plan 2A except:
Toe Protection: Toe trench with vertical face
2B
= 0.63
15
A34 through A36
Same as Plan 2A except:
Toe protection: Concrete-filled containers spaced
2C
1 m apart (Profile 4 to 70 m north of elbow)
16
A37 through A42
Same as Plan 2C except:
Toe protection: Containers spaced end to end
2D
= 0.62
16
A43 through A46
27
Chapter 3 Results