Gabion Baskets

Gabion Baskets donates product to Africa Nature Training (ANT) – March 2012

admin — Fri, 23 Mar 2012 06:31:39 +0000

The photographs below where taken while the students of ANT took care of business out in the veld.

Lorraine Doyle, Managing Director of ANT, expresses her gratitude for the donation made by Gabion Baskets: “On behalf of Africa Nature Training I would like to thank you for your generous donation of Gabion Baskets for a recent veld management project conducted by my students.”

Before starting the Gabion installation project in Upington – June 2011

admin — Fri, 30 Sep 2011 10:57:51 +0000

Take a look at photos of the Riverbank Lodge problem before Gabion Baskets assisted with a project design proposal and costed solution. What made it easier was that the client was also assisted with practical on site training and shown the ease of erecting the structure, he sourced the rock, labor and T.L.B. and project managed the job himself with our site trainer/supervisor ;- Please contact Japie Van Heerden - 082-7722759 for any further information. Rock in Upington supplied by Willie – 083-7215857 of Sandvishawe BK.

Before the riverwork in Upington started.

Initial damage from the storms in early 2011.

Temporary works to hold the embankment back earlier this year.

Before construction started on site.

Plans adopted for gabion installation project – July 2011

admin — Sun, 25 Sep 2011 08:28:44 +0000

Take a look at the detailed plans that were created for this project.

Gabions, Reno Mattresses and Geotextiles delivered to site – 17 September 2011

admin — Fri, 05 Aug 2011 11:06:40 +0000

We can see the Gabion Basket products being offloaded, checked and prepared for safekeeping and delivery site.

Site clearing and excavation proceeding for Gabion structure – 22 September 2011

admin — Thu, 04 Aug 2011 11:18:09 +0000

Here we can see the initial stages of the project at Riverbank Lodge in Upington, which started around 22 September, contract period was set at two months. About 1600m3 of Gabions to be erected. On site training, structure design and site visits were offered by Gabion Baskets in Johannesburg.

First Gabion Rock Supplied to site – 23 September 2011

admin — Wed, 03 Aug 2011 11:28:32 +0000

The rock used in gabion installations is 100-250mm size un-weathered, with a minimum density of 2.6tons/m3, gabion void ratio of 65% solids, 35% voids, thus with a bulk gabion density of 1.6tons per m3. Unselected rock normally has about 30% waste or undersized material, thus please allow for 2tons of rock per m3. The rock is neatly packed into the basket by hand to achieve a neat front face appearance. Angular blasted rock is best due to the interlock strength, rounded rock can be used but does not give the same compressive strength as blasted rock, and is much more difficult to achieve a neat looking facing. Environmentally it does not make good sense to remove rock from the area as it effects local animal habitats and can enhance erosion in streams.

Geotextile and River mattress foundation laid – 27 September 2011

admin — Tue, 02 Aug 2011 11:30:35 +0000

The geotextile layer is very important to prevent the migration of fine rive bed soils through the mattress layer. We use a 210g/m2 layer of Bidim to prevent soil movement. The Bidim is placed at all gabion and soil contact faces, behind, below and on the sides of the gabion structure. Overlapping 300mm where necessary.

Filling of first River mattresses proceeding – 30 September 2011

admin — Mon, 01 Aug 2011 11:32:11 +0000

Rock for mattresses are also 100-67% of layer depth, so 200mm for the 0.3m depth. The mattress thus has at least two layers of rock to prevent soil scour in the event of high water velocities. Mattress lids are supplied separately so as to have them out of the way during infill of rock. From a labor point of view we allow 1.0m3/man per day for gabions and 1.5m3/man/day for mattresses, as mattresses have now bracing and neat front facings that need to be maintained.

Installation of the Reno Mattress apron proceeding well – 3 October

admin — Sat, 30 Jul 2011 08:46:35 +0000

Herewith more photo’s showing the installation of the mattress apron below the gabion structure on a layer of geotextile. On-site training for installation is taking place with our gabion toolkits showing the correct rock size and quality to be used and the correct lacing together of adjoining mattress units, using the Binding wire supplied with the materials. These units are laced together using the preferred lacing technique along all common joins so that the structure become one integrated monolithic wall.

To counter all future loads imposed on it in the long term. Base baskets and mattresses are all Class A Galvanised and PVC coated to prevent long term corrosion of steel wire along the water’s edge. Higher basket layers do not require this due to infrequent flooding to this level. Already they are achieving 30m3/day using 30 people on site, indicating production rates of 1man/m3/day, for the erection of the basket, including , bracing, lacing and packing.

The rain has already started in Johannesburg this last weekend, which fills the Orange river upstream, so they are trying to complete the structure foundation layers before the water level in the river rises and makes it more difficult to acess the lower levels.

Structure proceeding well – 6 October 2011

admin — Thu, 28 Jul 2011 09:34:20 +0000

The structure is proceeding well, and visual evidence of progress is now very evident. We are racing against the imminent river rise when the rain comes.