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Rock Bags Applications

Prevent Soil Erosion Using Kyowa Rock Bags

Kyowa rock bags, a Japan-based innovation, are considered an advanced and effective alternative for gabions and rock mattresses to prevent soil erosion.

They are a simple product consisting of a net bag and a large number of small rocks, designed to solve various problems. The flexible structure, long-lasting durability, and ease of deployment make these rock bags a highly demanded erosion control solution in the market.

How Do Rock Bags Work as Erosion Protection Systems?

Place them on riverbanks, river embankments, creek banks, and river beds to stabilize the sediment layer.
Around pylons and piers in bridges to mitigate the risk of scouring and protect the bridge foundation.
Place rock bags along shorelines, beaches, seashores, and tidal areas for erosion control in coastal areas.
Deploy them to protect the foundations of coastal and offshore structures such as piers, jetties, pylons, and piles for erosion management.
Build rock groynes to reduce wave action, erosion, and control water flow
Place on the sides of railway ballast and on subgrade embankments for erosion control in railways
Use them in wharves and ship berths to prevent scouring of the revetment and reinforce toe protection.
Pile them on a slope to prevent soil erosion
Build headwalls around culverts and along road embankments using rock bags as erosion protection systems

What are the Other Applications of Rock Bags?

Place them on submarine pipes and cables to protect the structures from corrosion and damage while preventing them from swaying or moving.
Build cofferdams and floodways using rock bags to de-water specific areas or divert water in a different direction. It is useful during construction, heavy rain, or floods.
Level uneven lakebed, riverbed, and seabed by piling rock bags
Use them as an alternative for rock mattresses or as flexible gabions wherever necessary and suitable.
Utilize them as an emergency erosion restoration solution in the case of sinkholes, road collapses, and floods.
Build artificial reefs with rock bags to protect and promote the growth of marine life, control erosion, and block vessel passages

Want rock bags for erosion control? Contact Bluemont today on call +61 2 9091 0360 or website.

Standard Applications


Application	Illustration	Note	Example
River Bank Protection		The bag is used at the front of bank independently as foot protection. The installation methods are step piling and random piling.
Foot Protection		Rock bag is installed on the riverbed. In order to construct it without gaps, small size fillings are recommended.
River Dike Protection		Step pilling applies at a slope which becomes 1:2 or less(steep).
River Dike Protection		Level installation applies at a slope which becomes more than 1:2 (loose).
Riverbed Protection		Rock bag is installed on the riverbed. In order to construct it without gap, small size fillings are recommended.

Special Applications:


Application	Illustration	Note	Example
Over Block		Rock bag is used on foot protection blocks. It may be used as a vegetation base with earth covering.
Under Block		By using it under a foot protection block or a covering stone, an upside structure is stabilised from subsidence by sucking etc.
With Other Construction		Rock bag installed in wooden pile or other methods of construction at inside, back and forth. The cooperation effect with other methods of construction is expected.
Protection Of Front Part		Bank protection etc. are stabilised by installing the rock bag in the front, such as gabion, sandbag and a sheet pile.
Emergency Procedure		Rock bag is installed at a disaster place and erosion is prevented. An additional injection is possible because it has good flexibility.
Temporary Road		To avoid damage of rock bag by passing heavy construction machine directly on rock bag, please install steel plate on the top.
Filter Unit With Gabion		We recommend using rock bag and gabions together in places such as in water, where working with gabions alone is difficult.

KYOWA rock bags