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Retaining a Bank

Hello, 

I wondered whether anyone could offer some advice.  I have been asked to provide a design for an unused 'bank' at a school. It is approximately 1.7m high at its highest point by 4m wide and about 20m long.  I would like to cut into the bank to make a usable deck with steps and terraced planting.  None of the retaining walls would exceed 1m - would you advise using a structural engineer?  Being a school, the budget is crazy tight, but safety is paramount.

Many thanks

Melissa

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Replies

  • Rock filled gabions may be the answer

    http://www.weld-mesh.com/gabion.htm

  • Thanks Colin, I had thought about gabions.  Have you ever used them?  When I spoke to one of the companies who supplied them they thought they might still need to be secured to the ground by a concrete stake/post.

    Might have another look at them.

    Thank you.

    Melissa

  • We did the soft landscaping on a project 4 or 5years ago.  I will ask the contractor next week if posts were used.  I have a feeling the strength is in the backward rake and sheer weight of the units. These were filled with recycled hardcore and faced with natural stone.  I still maintain the site and it has matured well and this year we noticed birds were in and out of the crevices for the first time. 

    I will forward some pics to you

  • That would be great.  Sounds really lovely.  I will have a proper look into it.

  • Thanks Liam, I'll definitely look into it.

    Liam Timmins said:

    We used Gabions for reinforcing a river bank, they worked very well.

  • Melissa, I think the standard advice is retaining walls above 1m need structural engineer advice, but as you say with schools H& S paramount and maybe be better to be extra cautious. Maybe though the council there has a structural engineer in their building control (or related) department they could send out (at little extra cost) for the school? Could advise maybe whether you need the rebars/concrete foundations etc

  • If it helps,

    In thousends of years in history of agriculture in many countries around the globe, there was a use of terraces on slope. It is always fairly low up to about 1-4ft height max.

     

    If wish we supply recycled plastic edging that can do the job well.

    at height of 20cm, 30cm, 60cm , 100cm

     

  • PRO

    We used a gab ion retaining wall in a project on the hills of Malvern

    Happy to discuss if you want to get in touch.

  • Is the bank stable at the moment? If it is, I wouldn't disturb it, but simply plant into it.

  • Melissa  mentions the need to cut into the bank to make a usable space, hence the need for retention.

    Jennifer Lauruol said:

    Is the bank stable at the moment? If it is, I wouldn't disturb it, but simply plant into it.

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