Catalog Rakuna IV

A new type of wave dissipating block with 4 hollows on the surface

RAKUNA

NIKKEN KOGAKU CO.,LTD.http://nikken.kogaku.co.jp

It was demonstrated by Joint Reserch with Water Resources University and Nikken Kogaku Co.,Ltd. (2011)

where H s Significant wave heightr s Mass density of concreter w Mass density of water (r s / r w ) - 1

D n Nominal DiameterThis coefficient is valid for 1:1.5 slope.

K D value for Hudson's formulaK D = on trunk sectionsK D = on breakwater heads7.2

=N s = H s /(D n )

10.8

2.53

RAKUNA is NETIS registration technology.NETIS:New Technology Information System of

MLIT(Ministry of Land, Infrastructure, Transport and Tourism) in Japan

Sloping Breakwaterhydraulic stability

It was demonstrated by Joint Reserch with Kyoto University and Nikken Kogaku Co.,Ltd. (2007)

N s has a value for each deepwater wave steepness S 0 .S 0>0.04 N s =0.04S 00.02 N s =0.02>S 0 N s =

where H 0 deepwater wave heightL 0 deepwater wavelengthS 0 deepwater wave steepness (=H 0 /L 0 )These coefficients are valid for 1:1.5 slope.

K D value for Hudson's formulatrunk sections K D =

K D =K D =

breakwater heads K D =K D =K D =

note:

9.446.35

7.80

H s /(D n )

11.71

=

You can use the same value in Two layer. We confirmed that Two layer has the equal stability with thefull face form by the hydraulic experiments with irregular waves.

0.04S 00.020.02>S 0

6.294.23

2.60

S 0>0.04

2.42

0.02>S 0

0.04S 00.02

N s

2.12

S 0>0.04

Upright Breakwater

Shape size

The filleting is attached to more than 40t type.

cb2a

HD

HL

LD

e

19.06 2,447 2,683 2,959

1,810 1,984 2,1894t 3.92 1.707 10.45

1,475 1,6172t 2.12 0.924 6.94Calculated by 2.3t/m3

15.89

8.736

8t 7.85

16t

10t 9.72 4.225

Concretevolume (m3)

Size

30.93

6t

3.415

6.908

20t 20.09

Metal formarea (m2)

Actual weight (t)

49.82 21.661

64t

10.861

49.16

59.92 26.055

80t

40t 40.92

80.74 35.104

50t

21.76

6.25 14.19

25t

17.792

35.76

32t 32.35 14.065

24.98

63.39

2.716

16.54

12t 11.85 5.154

42.49

56.05

77.33

26.45

Basic dimensionsunitmmH

2,112

2,280

2,615

2,884

3,118

3,353

3,655

3,956

4,225

4,493

4,962

L

2,315

2,499

2,866

3,160

3,417

3,675

4,005

4,321

4,614

4,907

5,420

D

2,553

2,756

3,161

3,486

3,769

1,783

4,053

4,418

4,783

5,107

5,431

5,999

630

a

680

780

730

860

540

440

930

1,000

1,090

1,180

1,260

1,340

1,480

658

b

710

814

459

564

762

898

971

1,044

1,138

1,181

1,261

1,341

1,481

c

555

599

687

388

476

643

758

819

881

960

1,039

1,110

1,180

1,304

e

1,874

2,023

2,320

1,309

1,607

2,172

2,558

4,403

2,767

2,975

3,243

3,511

3,749

3,987

The standard of the block slope is 1:1.3 - 1:2.0.

Required block number N is calculated by the next formula.

V 1 N required block number concrete volume of one blockm3 Total construction volume of RAKUNAm3 void ratio56.5

unitm

8.6510t 3.00 2.74 3.74

2.70 3.83 4.58 4.504t 2.20 2.03 2.782.20 3.11 3.72 3.652t 1.80 1.66 2.27

Layerthickness

: hSize

2-levee crown rows

N v

8t2.386t

12t

2.552.80

3.20 2.93

4.487.15

B' B(common)

B'

4.61 5.22 5.155.68

8.33

6.43 6.35

B(common) 1.5

5.352.55 3.40

3.253.50

n=1.3

4.02 3.90

4.85 5.80

5.63 6.723.65 5.19 6.19

7.408.10

3-levee crown rows

3.155.70

1.5

4-levee crown rows

1.5B' B

(common) 1.3

5.25 6.63

9.42

7.50

6.606.10 7.69 8.69

8.00

9.30

1.3

Vertical breakwater covering form

2-layer covering method

Calcuration of required block number

B'

1 : n Bh

The above table is a standard size. We can do this other designs, please feel free to consult with us.

unitm

2t 1.95 3.27 4.59

3.55

4.50

3.8020t3.23 9.036.13

4.60 9.8510.56

7.946.653.45

6.085.57

4.444.74

5.00

4.30 7.34

12.80

4-levee crown rows

10.24 10.10

11.80

14.80

11.14 11.0011.95

12.10

12.9712.43 14.08

15.0013.23

11.449.10

14.0715.35

2.82

10.25

2-levee crown rows

6t 4.70

3-levee crown rows

4t 2.40

50t

32t40t

5.1010t 3.26 5.45

3.04

5.53

3.49

6.62

17.20

20t25t

4.02 5.64

7.59

12.32

8t

6.96

9.388.93

11.0511.2517.42

4.47

7.15

6.43 9.024.10

8.32

Crown width : B'

7.80

10.055.9810.99

8.4311.706.40

6.83

7.16 8.553.767.745.40 9.27

5.15

4.85

7.20

5.906.20

4.104.04

4.964.634.43

6.60

3.84

5.27

Size

80t

8.85

16t

6.10 7.425.35

13.90

7.518.13

7.20

10.509.90

8.40

15.94

16t

10.08

12t

50t40t

64t

32t25t

5.505.20

15.75

12.42

10.5511.43

13.20

6.61 15.54

4.82

14.089.37

5.91

9.80

64t80t

Full face covering methodB'

1 : n

The standard of the block slope is 1:1.3 - 1:2.0.

Required block number N is calculated by the next formula.

V 1 N required block number concrete volume of one blockm3 Total construction volume of RAKUNAm3 void ratio56.5

unitm

10.28 12.28 12.107.10 7.78 9.78 9.6010t 3.00 5.28 7.28

5.77 7.10 7.57 9.06 8.906.16 7.38 7.255.752t 1.80 3.21 4.43

4t 2.20 3.92 5.41 5.256t

3-levee crown rowsB

(common)B'

n=1.3

Layerthickness

: h

6.15

7.84 7.60

6.76

4-levee crown rowsB

(common)B'

6.80

1.3

7.264.30 4.66 5.88

8.36 10.54

6.60 7.20 9.10

vN

6.348t

12t

Size

2.55 4.612.80 4.90

3.20 5.66

9.508.908.868.49 8.30

1.51.5

10.30

5-levee crown rowsB

(common)B'

11.06 13.24

11.2011.4010.59

1.3

13.00

1.5

10.40

2-layer covering methodB'

1 : n B

h

Sloping breakwater form

Calcuration of required block number

The above table is a standard size. We can do this other designs, please feel free to consult.

unitm

10t 5.45 7.59 9.76

2t 3.27 4.59 5.91

25t

16t20t

4.85

4.103.80

50t

6.25

8.5617.65

13.1014.30

12.20

9.7010.60

6t

11.50

8.66 9.15 11.569.90

8.409.00

32t

80t 10.99

11.8613.35 16.8912.46 15.76

8t

40t5.20

4.50

3.55

64t 5.50

16.56

14.0213.10

15.28

13.39

11.5810.62

12.48

14.64

12.20

5.10

Crown width : B'3-levee crown rows

13.0015.30

4t 4.02 5.64 7.26

24.45

16.5018.0018.34

14.0014.20

19.00 20.30 24.00

20.80

14.20

21.19

15.40

6.96 9.80

15.4016.5017.55

6.43 9.02

4.70

19.4518.83

11.30 14.4615.68

12.05

17.94 22.57

18.13

11.61

9.21

10.74

8.53

13.41

19.5019.86

16.81

4-levee crown rows 5-levee crown rows

22.15

15.54 20.01

6.62

13.59

15.99

64t

11.43

13.20

14.73

14.08

12.66

5.91 8.32

7.15

17.0450t10.05

9.05 12.59

Size

10.30 14.45

20t

7.88

9.2810.0110.94

7.226.70

16t12t

9.6580t 6.10

9.3712.42

10.5532t

8.85

25t8.137.51

40t

Full face covering methodB'

1 : n

The side form is set up in the bottom form, and installing the cap of leg.

Casting concrete. Multiplying the vibrator carefully so that the bubble should not occur.

Compacting enough with the vibrator, and the levee crown is finished up.

After the formwork is cleaned enough with the keren stick, and apply the release agent.

Assembling the bottom form, side forms and side form's top.

Fabrication and setting

The special mount is prepared more than 40t type. For 6t-32t type, subsidence prevention components make up 1 set.

1) each plates assembling 2) release agent (oil) spraying 3) bottom plate installation

4) side plates installation 5) concerte casting 6) spacing and leveling

Flow

Please see the construction manual about the security precautions of details and the high-place work, etc.The time of the stripping depends on the strength of stripping examination book.

After casting concrete, it covers with sheet etc. and curing is done until the required strength is filled.

Stripping of the side form. More curing, stripping of the bottom form after required strength is filled.

7) curing 8) demolding side plates 9) demolding bottom plate and lifting to stock yard

10) stock 11) transportation 12) setting

L1(D+a)n1+aS1L+2a for one rowL23.5a(n2-1)+D+1S2L+1 for one rown1the number of block rows of the concrete casting yardn2the number of block rows of the transposition yard

a

aa

a

LD

L1

S1

3.5a500500 50

050

0

L2

S2

Required area of fabricationPlease secure an enough area for the fabrication yard to work safe and efficiently. A required area of the fabrication yard is different depending on the field conditions of the block size, the production volume and the amount of the metal form, etc. This calculation method is general yard arrangement. Please consider the heavy equipment road and the haul road additionally.Please level the yard so as not to cause the warp of the metal form.

Concrete casting yard

Transposition yard

Temporary storage yard (stock yard)temporary storage yard area(m2) = occupation area per one block * K K = total production volume - n1 - n2

Required area of the concrete casting, transposition and temporary storage yard (reference)Required area of the concrete casting, transposition and temporary storage yard (reference)

This table assuming 100 blocks fabrication and 10 metal forms.

Echizen fishing port in Fukui Pref. 64t

2t 0.44 1.617 1.783 22.7 2.5 16.7 2.74t 0.54 1.984 2.189 27.9 3.1 20.2 3.0

6t 0.63 2.315 2.553 32.5 3.6 23.4 3.4

8t 0.68 2.499 2.756 35.1 3.9 25.2 3.5

10t 0.73 2.683 2.959 37.7 4.2 27.0 3.7

12t 0.78 2.866 3.161 40.2 4.5 28.8 3.9

16t 0.86 3.160 3.486 44.4 4.9 31.6 4.220t 0.93 3.417 3.769 48.0 5.3 34.1 4.5

25t 1.00 3.675 4.053 51.6 5.7 36.6 4.7

32t 1.09 4.005 4.418 56.2 6.2 39.8 5.1

40t 1.18 4.321 4.783 60.9 6.7 43.0 5.4

50t 1.26 4.614 5.107 65.0 7.2 45.8 5.764t 1.34 4.907 5.431 69.1 7.6 48.7 6.080t 1.48 5.420 5.999 76.3 8.4 53.7 6.5

2.7 216

2178

2482

319

87 61 4.0 320 468

57 46

1167

1369

15721864

637440

512

672

27953399

816

960

11041312

1536

1752

19762408

966

10.2

12.0

13.816.4

6.4

8.4

133

154

173203

409

468

218

255

295349

113

5.5

24.730.1

233

262

293350

19.2

21.9

Basic dimensions(m)

a

526641

(casting,

transposition,stock yard)

(m2)

117

137

181

80

89

Stock yard(for 100 blocks)

Stock yard area*k (m2)

Occupied area perblock (m2/piece)

Casting yard areaL1*S1 (m2)

Size

Casting yard(for a row composed of 10 blocks)

Transposition yard(for a row composed of 10 blocks)

L2(m) S2(m)Transposition yard

areaL1*S1 (m2)

159 100 7.4 592 851

L D L1(m) S1(m)

738

RAKUNA was developed in 2007. Before now, It was been used more than 300,000t.

64t, Wave absorbing breakwater, Fuji Coast, Shizuoka Prefecture25t, Foot protection works,

Sarahama fishing port, Okinawa Prefecture

50t, Wave absorbing breakwater, Fuji Coast, Shizuoka Prefecture

RAKUNA has been also active in the recovery from the 2011 Tohoku Earthquake Tsunami Disaster.

20t, Wave absorbing breakwater,Hachinohe Port, Aomori Prefecture

HEAD OFFICE17F Nittochi-Nishishinjuku bldg. 6-10-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan

+81-3-3344-6811 [email protected]

INTERNATIONAL DIVISION+81-3-6361-0028 [email protected]

HANOI REPRESENTATIVE OFFICE19F LADECO Build, No.266 Doi Can Str, Lieu Giai Ward, Ba Dinh Dist, Hanoi Vietnam

+84(0)4-37621682 +84(0)[email protected]

Sep.2012-RAKUNA010E-mail.

E-mail.Tel. Fax.

Tel.

Tel. Fax.

Fax. E-mail.

Documents

Catalog Rakuna IV