Driven piles and proximity to neighbours

We're about to put a retaining wall around part of our land.

Some background.

We have 1.5 Rai of swamp close to the river, at our location the river is still tidal. Although we don't have river frontage ($$$$$) we do have tidal khlongs on 3 sides, 4th side is the road.

I want to put in a retaining wall round part of the perimiter the idea being to keep our expensive fill from disappearing with the tide.

The khlongs are 2-3m wide and of uncertain depth. The neighbours have similar walls down their side, one has a house wall close to the edge.

Our contractor wants to use driven concrete 'H' piles with an angled brace on the dry side, the gaps being filled with 2m concrete planks, we then fill in behind to level and gain a couple of metres of flat, useable garden.

I'm worried about driving piles this close to the neighbours although doubtless the water will absorb much of the energy.

Anyone got experience? What happens if next doors' wall collapses because of our contractors' activities? Our problem, their problem, contractors' problem?

I can only speak from a BKK perspective concerning pilings.

Normally, before any project the neighbors have to be informed about the pilings. A survey is done to set a base of current cracks. Ideally, if cracks occur because of the driving of the pilings, then the owner of the home that is building is responsible for those cracks.

Now please remember TIT...:)

SBF is the piles expert on here ain't he,,,
Wasn't he the one complaining about them awhile back???
:rofl:

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Originally Posted by More Volts Igor

Anyone got experience? What happens if next doors' wall collapses because of our contractors' activities? Our problem, their problem, contractors' problem?

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Contractors problem as long as he doesn't do a runner.

Although if it gets down and dirty then it is your problem as you told him to do it :(

really depends on "Who is the farang" , thats the one whose fault it is...

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Originally Posted by More Volts Igor

Our contractor wants to use driven concrete 'H' piles with an angled brace on the dry side, the gaps being filled with 2m concrete planks

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Do you a price per metre for this as it might be what I will want to use for our property by the river

I believe it is the hydraulic vibration pile drivers that cause the most physical problems as they set up waves in the ground. The more common impact ones are just noisy. But yes like renting a car a few pictures would be a good idea, if they let you. Also your neigbhors if they have the same construction should be sympathetic.

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Originally Posted by blackgang

SBF is the piles expert on here ain't he,,,
Wasn't he the one complaining about them awhile back???
:rofl:

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yeah, but mine haven't reached the 'driven' stage yet

OK, :)

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Originally Posted by Carnwadrick

Quote:

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Originally Posted by More Volts Igor

Our contractor wants to use driven concrete 'H' piles with an angled brace on the dry side, the gaps being filled with 2m concrete planks

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Do you a price per metre for this as it might be what I will want to use for our property by the river

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I'll have to check with the Missus, IIRC we were quoted 3k Baht per metre all in. We're not in a cheap area though, so your mileage may vary.

Do note that we don't have flowing water just up and down with the tide, I'm not sure how well this technique will withstand riverbank erosion.

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Originally Posted by slimboyfat

Quote:

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Originally Posted by blackgang

SBF is the piles expert on here ain't he,,,
Wasn't he the one complaining about them awhile back???
:rofl:

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yeah, but mine haven't reached the 'driven' stage yet

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SBF.

I notice from your avitar that " You did get where you are today by not being driven"

^^ Thanks MVI, the river bank is about 10 metres wide and at present is two metres above river level we are looking to add another metre of protection around our 2 rai just in case. I assume the concrete planks are reinforced with rebar, looks like a better solution than building a reinforced block wall probably quicker too.

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Originally Posted by Carnwadrick

I assume the concrete planks are reinforced with rebar, looks like a better solution than building a reinforced block wall probably quicker too.

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Yep, the planks have a reinforcing mesh embedded.