Concrete Bag Retaining Wall
Using SoluForm Concrete Filled Bagwork to Build a Concrete Bag Retainining Wall
Build a Concrete Bag Retaining Wall
SoluForm concrete filled bagwork is available pre-filled and arrives ready to use.
We currently offer two grades of concrete within our bagwork, a 32N high strength structural mix, and a 12N mix.
The high strength structural mix is designed to form a longer lasting, durable concrete block, suitable for a range of underpinning, scour protection and river walling projects, and works particularly well with steelwork. Our pre-filled concrete bags are ideal for use in the construction of a concrete bag retaining wall. This structural mix is typically used for schemes specified by Consultants, for more technically demanding schemes, or where there is a need for a longer design life. The high strength mix is available in both the underwater and above water bag options.
We now also offer a 12N specification concrete, suitable for general void filling and civil engineering applications for our above water product.
The 12N mix is similar in strength and durability to an ST1/GEN1 or Postmix concrete and can offer a cost effective alternative to our structural mix. The 12N mix is only available in the above water bag option.
Patented Biodegradable Liners
Underwater bagwork utilises SoluForm’s patented biodegradable liners and enable dry mix concrete to be placed below water, with the use of steelwork, in a clean and environmentally acceptable manner. Alternatively, our water soluble above water bagwork can be useful for dry or out-of-water bagwork applications, or for schemes where either the environmental risk isn’t there, or the risk can be managed. In the absence of surrounding water, above water bagwork is hydrated by either pre-soaking or hosing in situ, dependant upon where the bagwork is placed.
The important considerations when selecting the type of concrete are Function and Design Life. The temptation is always there to put in a low strength, low durability, cheaper concrete mix but the consequence is ultimately a poorly performing bagwork construction with a short design life.
For high value or vulnerable assets, we recommend always repairing and protecting with structural grade concretes.
Steelwork should be included to tie the individual blocks together, helping to create a large singular block of concrete bagwork. Steelwork is important in schemes where protection against scour is needed, or the design life of the blockwork needs extending, to prevent individual blocks from being dislodged.
Steel rebar pins are pushed down through the bags during placement, and can also be used to tie blockwork to other structures, like abutments or retaining walls.
We stock standard sized 300mm long, U shaped, galvanised mild steel rebar pins that are suitable for use with our bagwork. Other thicknesses, sizes and grades of steel can be provided on request, given sufficient lead time.
Applications & Uses
In addition to building a concrete bag retaining wall, there are a wide range of other possible applications for SoluForm concrete filled bagwork due to the regular size of the bags which can be hand placed into a wide variety of forms and designs. Typically uses include:
- Concrete bag retaining walls
- Structural underpinning of abutments and training walls subject to scour.
- The formation of scour protection within watercourses.
- The creation of pipe, culvert or bridge headwalls and retaining walls.
- The formation of river walls, including repairs to existing walls.
- The creation of SUDS schemes, to create storage lagoons, etc.
- Earthwork retention.
- Embankment stabilisation works.
Why Use SoluForm Concrete Bagwork to Build a Concrete Bag Retaining Wall
We have a number of standard concrete bagwork wall designs for both in-water and non river applications. These are backed up with design calculations, risk assessments and design check statements and can be supplied upon request.
Non River Designs
In River Designs
Design guidance documents are in Acrobat PDF format. If you wish to save these to your local computer, please right-click each link and select the ‘Save As’ option.
* Site specific conditions (such as presence of water, slope stability, soil bearing capacity etc.) should be considered by a qualified and experienced civil or structural engineer.
General Assembly Instructions / How to Use SoluForm Concrete Bagwork
All prefilled bagwork should remain palletised and wrapped until ready to use. Palletised bagwork should be stored in the dry, or suitably covered and protected if stored outside.
Care should be taken in removing protective wrapping, so as not to cut or damage the bagwork. Likewise, the bags should be inspected before placement for obvious signs of damage.
When ready to use, bagwork should be removed individually from the pallet wrapping, and individual bags gently shaken, rolled or squeezed to loosen any compacted dry mix concrete contained within each bag. Should there be any small amounts of cement powder on the outside of the bag, resulting from the filling process, this can be gently brushed off with a soft brush, prior to approaching the watercourse.
Where bags are more heavily dusty, it is likely that the liner has ruptured during transit and the bags should not be used. Only intact, undamaged bags should be carried into or used in the watercourse.
Where damage has occurred during transit, these damaged bags should not generally be used, although often the dry mix can be reused to refill empty bagwork or reutilised for other purposes. We would also recommend periodic inspections are carried out to check for any damage from other factors such as adverse weather conditions, vandalism, contamination, etc.