Rockfall prevention systemthat protects the environment

TOKYO ROPE MFG. CO., LTD.
TOKYO ROPE MFG. CO., LTD.
NIHONBASHI FRONT BLDG. 6-2 NIHONBASHI 3-CHOME CHUO-KU TOKYO 103-8306 JAPAN
Tel.: + 81 3 6366 7788, Fax: +81 3 3278 6870

The Representative office of Tokyo Rope MFG. CO.,LTD. in Moscow
22, Bolshaya Yakimanka str., Moscow, 119180, Russia
Tel.: + 7 495 645 04 03, Fax: +7 495 645 04 09

The Representative office of Tokyo Rope MFG. CO.,LTD. in Kazakhstan
Office No. VP-62,7th floor,Business center “Na Vodno-Zelyonom Bulvare”,
BLDG No. 12/1, D. Kunayev Street,Astana city, 010000, Republic of Kazakhstan
Tel.: + 7 7172 500 759, Fax:+ 7 7172 500 780

INTERNATIONAL INVESTORS Co. Ltd
Official Agent of Tokyo Rope MFG., CO. LTD in Kingdom of Saudi Arabia
Office 7 Dinaar Commercial Center, King Abdulaziz Road
PO Box 104451, Jeddah 21331, Saudi Arabia
Tel.: +966 12 236 5511, Fax:+ +966 12 236 5522
http://www.tokyorope.co.jp/english

TOKYO ROPE MFG. CO., LTD.
1511-AVNROPE NET
Examples of completed projects using Rope Net

Rope Net prevents rockfalls andpreserves the landscape.

Rope Net that helps eliminate the rockfalls, also protects environment. If you use Rope
Net with a net or other systems that prevent rockfalls not only relatively large rocks,
but also of small stones.

Rope Net advantages
Minimal removal of trees during installation works
The net is made of separate ropes that go around the trees, so that removal oftrees is not required.
Fixes stones at slopes
Flexible and durable wire rope firmly covers the slope and attaches large stones
to it, preventing the falling of non-attached stones on a slope and providing aslope stabilization.
Ease of assembling
Materials and equipment used for Rope Net have a light weight, so that
assembling causes no difficulties.
Possibility of use with steel net
At areas with the fall of soil ground and stones through the net with 50cm x
50cm meshes, Rope Net can be used along with a net that can hold small stones.

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ROPE NET
Examples of completed projects using Rope Net

Rope Net firmly holds large
non-attached stones, in areas withthe fall of small and large stones.
Gallets of large stones, a net
attached to the Rope Net can beused.

In the process of assembling Rope Net direction and intervals between wire ropes that form thenet are defined according to the tree location. Thereby tree removal is not required.

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ROPE NET
Examples of completed projects using Rope Net

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ROPE NET
Examples of completed projects using Rope Net

Rope Net construction

Rope Net type

Unit of measure: mm

Main ropeType

2 x 2 – 0.5 x 12(standard type)
Notice 1:

Construction
Diameter

Verticalinterval (b)3 x 7 φ122 (m)Strengthened ropeAnchor

Horizontal Construction
Diameterinterval (h)Verticalinterval

Horizontalinterval

RockSoil3 x 7 φ120.5 (m)0.5 (m)Cement anchor
A, BD22(M20) x 1000

Pipe anchorA, B
φ114.3 x 4.5 -1630

2 (m)A type anchors are set at the net boundary
B type anchors are set inside the net

Construction components
RopegripType
2 x 2 – 0.5 x 12(standard type)

Unit of measure: mm

Main rope
For φ12 - 800 (Cement anchor A )For φ12 - 975 (Pipe anchor A )Strengthened rope

Cross-shaped
grip

Cross-shaped
anchor grip

Cross clip

For φ12 - 80050 x 95

50 x 95

3.2 x 60 x 60

Anchor installation
Typeinstallation procedure

Equipments

Notes

Cement anchor
A, Bfor rocks

Plunge a cement capsule into water for 5 minutes untill airbubbles stop escaping. Place the cement capsule into a
900 mm hole, made by 40-44 diameter drill. Place ananchor in the hole.

Compressor
Bit
Rock-drill

Cement capsule (standard type)- φ36 x 600 - 2 pieces (per 1 anchor)- at least 24 hours untill full hardeningof the construction

Pipe anchor
A, Bfor soilWith the help of puncher place pipe anchor into a 1.5
meter hole.

Compressor
Puncher

Rope Net strength
In case of difficulties, that happen during the installation, you can consult Tokyo Rope experts.
TypeCement anchor
The main component of a system that prevents
the rockfalls is an anchor. The cement capsule,used for its installation, is manufactured understrict quality control. Thereby cement anchor will
be securely attached.

72 x 2 – 0.5 x 12

Load of falling rocks
kN/m2

kN*

12.50

50

11.25

45

10.00

40

8.75

35

7.50

30

6.25

25

5.00

20

Slope ratio (1:X)
1.0

0.9

0.80.7

0.6

0.5

0.4

0.3

*Load, applied to a mesh area, generated by the wire ropes (b・h)8ROPE NET
Rope Net construction

Rope Net construction
Element A

Rope Net standard design
2 x 2 – 0.5 x 12

Element B

Cement anchor A

Pipe anchor A
Ropegrip φ12 - 975
Wire rope (3 x 7 φ12)
Wire rope 3 x 7 φ12

φ114.3 x 4.5

Element C

Element E

Element D, F

Cross-shaped grip 50 x 95

Cross-shaped anchor grip 50 x 95

Vertical wire rope(3 x 7 φ12)

Cross clip 3.2 x 60 x 60
Cross-shaped anchor grip 50 x 951630

Cement anchor A D22 (M20) x 1000

1500

1000
900

Ropegrip φ12 - 975

Horizontal wire rope
(3 x 7 φ12)

Horizontal wire rope
(3 x 7 φ12)

Horizontal wire rope (3 x 7 φ12)
Ropegrip φ12 – 800

50

95

Cross clip
3.2 x 60 x 60

M16

Horizontal wirerope (3 x 7 φ12)

Horizontal wire rope
(3 x 7 φ12)

Vertical wire rope
(3 x 7 φ12)

Pipe anchor B

Element G

Component name

3.2

Cross clip 3.2 x 60 x 60

Element D

Graphical symbolφ9(3/8")60

Vertical wire rope
Horizontal wire rope

Horizontal wire rope
(3 x 7 φ12)

Strengthened vertical rope
Ropegrip (for cement anchor A )Ropegrip (for pipe anchor)
Ropegrip (for strengthened wire rope)
Cement anchor A (for rocks)
AnchorCement anchor B (for rocks)
Pipe anchor A (for soil)
Pipe anchor B (for soil)

Horizontal wire rope (3 x 7 φ12)

Ropegrip

Vertical wire rope (3 x 7 φ12)

Cross-shaped anchor grip 50 x 95

Cross clip

Cross-shaped anchor grip
Cement anchor A

Cement anchor B

Cement anchor B D22 (M20) x 1000

TypeFor cement anchor A
For pipe anchor A

For strengthened wire rope9Wire ropeA

Strengthened rope (3 x 7 φ12)

Cross-shaped grip
Cross clip

Cross-shaped anchor grip

Cross-shaped grip
50 x 95

Strengthened horizontal rope

60

Cement anchor A

Detailed description of Rope Net components

Cement anchor B

50

Cement anchor A

Wire rope
diameter
φ12φ12φ12A
80097580010