Revetment Walls

River and Canal Protection

River and Canal Revetment Walls

Revetment walls are permanent structures designed to prevent subsidence that commonly occurs adjacent to all rivers and canals. By definition a revetment structure is a protective covering on an embankment of earth designed to maintain the slope or to protect it from erosion. Most revetment walls are earth-retaining structures not unlike terrestrial walls, but revetments are also substantially exposed continuously to changing tidal water levels and erosion at the toe facing the water. In walls fronting rivers and flood canals, the latter provide a major cause for wall movement and failure. Evidence shows tht the leaching of sand from behind revetments through weepholes, control joints, cracked construction joints or under the base itself, generates the greatest design problems because it is so unpredictable.
Ref: When Retaining Walls Come Tumbling Down P.32

Further Reading:

When Retaining Walls Come Tumbling Down

When Retaining Walls Come Tumbling Down 
Author: Alan Davis

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Revetment Wall failure

Failures like this are major disasters and can be a challenge in rebuilding. Access for this project was limited so all works for the rebuild was via barge.

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Subsidence

Rock protection has failed to stop subsidence. A total rebuild designed to stop future failure was needed for this project.

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Retaining Wall collapse

Collapse of block revetment wall allowed leeching and undermining of the retaining wall. Complete rebuild of revetment and retaining wall was required.

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Revetment subsidence

Following loss of sand through revetment wall. Subsidence occurred under retaining wall foundation placing structures at risk.

Total rebuild was required.

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Storm water failure

Projects like this failure are difficult, one has to find why a wall like this collapsed. In this case a broken storm water pipe. Our contract with this project was with Suncorp and Gold Coast City Council insurance (easement).

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Revetment collapse

The collapse of revetment wall and retaining wall occurred from loss of beach profile (Main River).

All new works had to be piered.

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Structural weakness

Alan and his crew see collapses like this regularly. The original design and workmanship leaves a lot to be desired. All works on this project had to be done by barge.

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Storm Water easement failure

Major failure from storm water easement failure.

Very difficult project due to limited tidal movement. All foundation and pier works for this project were done by barge. Works contract Gold Coast City Council.

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Revetment Failure

Failure of storm water easement and section of revetment wall over two residential properties. Contract for this wall was with Gold Coast City Council Insurance.

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