Contiguous piled retaining wall

[amwc]

Hi

Just wondering if any one had any knowledge of this type of construction and how the cost compares to traditional retaining walls?

Cheers

 

[Brigade77]

I have extensive experience of developing on 'bad' ground & can only advise that you really should seek the professional services of a civil engineer.

The internets advice costs nothing & is worth nothing. Especially relevant when 400tons of earth is moving towards you !

 

[amwc]

Hi

Thanks for the reply

Its not necessarily bad ground.

I would definitely get further advise before trying to do the piling myself, in fact I wouldn't do the piling myself.

I was merely wondering how much this scheme costs when compared to installing a cantilevered retaining wall?

The area I have is very tight and I had a thought about a piled wall today so thought I would ask.

I know a bearing pile would cost roughly £500 per pile but is a piled wall less than this?

Maybe this is the wrong forum to ask this question?

Cheers

 

[CambridgeBrummie]

Depends on the size of the development and depth of piling required.

For small scale work this is going to be expensive as simply the cost of mobilising a piling rig to site can be in the order of £8k and that is before you have done any piling! If it is small scale, I would suggest traditional reinforced concrete walls are more suitable. Also depends on what level of waterproofing you require (see BS8102:2009).

Unless of course we are talking about "iceberg" properties in London, this is about the only time I would opt for a contiguous piled wall.

 

[Paulg31]

What depth of soil do you need to retain? I'd have thought on a domestic scale a contig piled wall would be very expensive.

do you have a photo of sketch showing the proposed layout?

If the retained height isn't too much there's the option of sheet piled walls with an RC capping beam at the top. The sheet piled wall could always be faced with brickwork.

 

[^woody^]

A bit of a strange question. A retaining wall is designed to resist lateral loading, and piles transfer vertical loading.

So you wouldn't really even consider piles as a choice, unless it's a massive specialist civil engineering project which required it.