Boggy ground

[wiggy]

i have to concrete a number of wooden posts into a bog, they will be supporting a boardwalk, max 400mm off the ground.

whats the best way to do this, please..

[seanandruby]

you could dig out and put some plastic pipe sticking up to stop the boggy ground falling in, then put posts in pipe and concrete them in, or build some box shutters.

[Pablo]

Are there any conservation issues with the site?. Is it a peat type bog or a wetland bog and how soft is the ground and does it ever dry out throughout the year. Simple boardwalks are normally constructed with very heavy timber that is mechanically forced into the ground until it gives suitable resistance. Concrete needs to be set onto hard ground or it will sink and your holes will fill quickly with water before you can back fill etc. Bogs can be up to 10m deep and swallow machinery whole on what appears to be firm ground. Peatbogs have a naturally preserving effect on wood so it doesn't rot very quickly.

[wiggy]

thanks for the replys..

the plastic pipe and shuttering are options i have thought about.

as far as the bog goes its in cork in the grounds of a castle, the guy thats been out to see it says its not that boggy, it has a 4m wide stream running through it,

i am going out there this friday to have a look with a view to start it the week after, just trying to get some advice so i can go out there with some answers and look good

[lutonlagerlout]

wiggy do i know you mate?
from cod4?
regards LLL

[seanandruby]

If you are going to use machinery on boggy ground you will probably need to lay a bog mat to take the weight.You will also need a good silt pump. there will be a lot of waste with temporary works etc, can work out very expensive. caissons, sheet piles etc.

[Dave_L]

One job to avoid, perhaps?

[wiggy]

LLL i dont think so mate, your name suggests we have the same passtime though, whats cod4?

i think the most machinery we will have will be an auger, just seen some pictures of the area and it looks more like a wooded copse with a stream than a bog,

the title of the project is the bog garden boardwalk, so this makes me think it could be damp in places.

i havent yet comitted a price, so when i go to view it friday if it looks too uncertain i will offer to do it on a day rate for me and the lads.

basically the job is 170m boardwalk snaking through the "bog garden", crossing the 4m stream twice with 2 larger areas acting as viewing areas over ponds,

[lutonlagerlout]

cod4 is a FPS game, call of duty 4.
one of the guys in my squad is called wiggy,i thought it may be you

LLL

[wiggy]

not me LLL....


went out to see the site yesterday the stream burst its banks a few days ago, the water has subsided now, but its real muddy, its not boggy like the fens... just wet, looks like clay and mud with flint (?)

also i have to sink some posts right on the waters edge, (the small stream is quite fast) i thought i could put a concrete pad in, say 300mm wide x 1400mm long and as deep as i can get it and protect it with a gabion basket,

the pads will be taking a 1.4m wide 4m long foot bridge... with fairly heavy foot fall in the height of seasons,

does this sound like a plan? or am i way off....

thanks...

[surreyhillslandscapes.com]

Recently watched the Time team with Tony Robinson and his hemp wearing friends, they were excavating a prehistoric timber trackway in Somerset somewhere, 6000 thousand years ago they used long sharpened stakes and drove them about 4 foot into the bog and then built off that, was in the days before concrete and building regs though.....

http://www.channel4.com/history....g2.html