Supporting a bank

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27 Jan 2007
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Location
Essex
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United Kingdom
Between my house and my neighbour is a bank which varies in height but averages 2.5m. We are on the top of the bank. The bank is exceptionally steep (60degrees +). Between the houses the bank is stabilised with sections of pipe sunk into the soil. From there to the end of the garden it is not stabilised. It is held up by the brambles etc. that grow on it and is far steeper than the 45 degrees maximum a natural bank is supposed to be limited to!

We want to build a double garage that comes right to the edge of the bank. This would replace an ageing single garage that is at present about 2 metres from the edge.

I should add that both properties are Victorian, the single garage is 1950's so it has all remained fairly stable for a long time although there are signs of slight slippage.

I am wondering what the most cost effective way of stabilising the bank would be. Obviously we need to do the bit where we want to build the garage but ideally the whole stretch.

Sorry for the long post but would love to get some ideas ....
 
Who said a slope can't be steeper than 45deg?

I have to say that a picture really would tell 1000 words here.

Needless to say, you will need to do some sort of slope stability analysis, and it will probably be best to speak to a qualified structural/geotechnical engineer. What is the soil type?

David
 
DSA said:
Who said a slope can't be steeper than 45deg?

I have to say that a picture really would tell 1000 words here.

Needless to say, you will need to do some sort of slope stability analysis, and it will probably be best to speak to a qualified structural/geotechnical engineer. What is the soil type?

David

...yeah and while your at it Cleudo get some rock samples and liquefaction vulnerability checks done too. how is the seismic shift in your area anyhow?
 
Do I detect a slight level of sarcasm in that comment...

However, it sounds like a retaining wall is needed. 2.5m is not insignificant.
 
a picture would be good. grasscrete can be used in the sitution described if you dont want to go for a retaining wall etc.
 
There are many ways to solve this and many variables to consider, but the answer lies at a local structural engineers office and not on a forum
 
I agree; what you planning could cause problems, not least with BC! You need to get advice from a structural engineer.
 
Thanks for advice so far. I will ultimately get an engineer to look but thought I may as well get an idea of what I might be looking at in terms of complexity/cost first ...
 

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