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repair of ground subsidence

Posted by Neil Petrie @ Core Landscapes on May 11, 2013 at 8:18pm

Hi all

I'm look for a solution for an issue in a garden we landscaped around 3 years ago. The property is part of an old estate walled garden that has been developed into 5 luxury homes - 3 gardens of which we have carried out various landscape works in.

The problem has occurred on the first one that we landscaped, which is central on the site. We believe that the developer used this central site as a dumping ground and fire pit for all sorts of site waste during development. The problem is that part of a gravel path and adjacent lawn is subsiding quite significantly now.

The hole is swallowing up not only the gravel, but also the membrane and compacted hard-core base below!

Short of fairly extensive excavations and pouring a concrete pad, what would you consider to be the most effective and cost efficient way of resolving this situation?

Many thanks in anticipation of your response.

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Tags: ground, path, subsidence, subsiding
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Replies

  • Neil Petrie BSc Landscape Mgt May 11, 2013 at 8:27pm
    Core Landscapes is me guys. I just bought a new tablet thing (that i havent got the hang of and so rarely use) recently and so it asked me to log in and ended up logging me into a profile that I had set up a couple of years ago under my business name but never use... So...what do you think to this? Is it going to be a concrete pad or has someone got a better idea?
  • David Benson May 11, 2013 at 11:15pm

    how old are the houses if under 10 years there could be a garantee to cover it, the subsidance could be a number of things old tree stump, mine workings, a leaking drain or water pipe etc to pour a concreat slab might not work long term as that could start sinking

  • Neil Petrie BSc Landscape Mgt May 11, 2013 at 11:43pm
    You might be correct. I will have them investigate whether a guarantee exists as the houare we're only being finished 3years ago. From what I gather the developer had all manner of waste buried in an excavator-dug hole and some burned, the rest filled over. We obviously didn't dig down to investigate, but did come across odd bits of rubbish when prepping ground for lawns. Thanks.
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