Ground anchors

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A

Andrew Mawson

Guest
Anyone got a good design for ground anchors?

I will need to winch some heavy plant (2 ton or so) on wheels across
some soft grass, and although there are a few stratigically placed
trees they don't cover all the places I need to go.

I've used 'giant corkscrews' in the past but they weren't very good.

AWEM


 
Andrew Mawson wrote:
> Anyone got a good design for ground anchors?
>
> I will need to winch some heavy plant (2 ton or so) on wheels across
> some soft grass, and although there are a few stratigically placed
> trees they don't cover all the places I need to go.
>
> I've used 'giant corkscrews' in the past but they weren't very good.
>
> AWEM

The old Fairey/ Mayflower one was good - uses the weight of the vehicle and
is braced against the front bumper as well. It looks roughly like a standard
home service ramp - you drive the front wheels onto it, attach the chains to
the bumper (as close to the chassis members as possible) then drive forward
again till the chains are tight. The more you pull, the more down weight on
the ground anchors. The design enabled them to fold flat when not in use
too.

Make sure you know what your weakest link is - these anchors WORK. Best with
hydraulic winches that simply blow a spring loaded valve when the resistance
gets too high.

Karen


--
"I'd far rather be happy than right any day."
- Slartibartfast


 

"Andrew Mawson" <andrew@no_spam_please_mawson.org.uk> wrote in message
news:[email protected]...
> Anyone got a good design for ground anchors?
>
> I will need to winch some heavy plant (2 ton or so) on wheels across
> some soft grass, and although there are a few stratigically placed
> trees they don't cover all the places I need to go.
>
> I've used 'giant corkscrews' in the past but they weren't very good.
>
> AWEM
>
these should give you some food for thought
http://www.anchorsupplies.com/accesspries.htm
Derek


 
Derek wrote:
> "Andrew Mawson" <andrew@no_spam_please_mawson.org.uk> wrote in message
> news:[email protected]...
>> Anyone got a good design for ground anchors?
>>
>> I will need to winch some heavy plant (2 ton or so) on wheels across
>> some soft grass, and although there are a few stratigically placed
>> trees they don't cover all the places I need to go.
>>
>> I've used 'giant corkscrews' in the past but they weren't very good.
>>
>> AWEM
>>
> these should give you some food for thought
> http://www.anchorsupplies.com/accesspries.htm
> Derek

Those will not work in soft soil or sand, though - the big advantage of the
ramp type of anchor is that they hold on any terrain. And fold flat for
storage, and are not too hard to make up yourself if you're handy with a
stick welder.

Karen


--
"I'd far rather be happy than right any day."
- Slartibartfast


 

"Karen Gallagher" <[email protected]> wrote in message
news:[email protected]...
> Derek wrote:
> > "Andrew Mawson" <andrew@no_spam_please_mawson.org.uk> wrote in
message
> > news:[email protected]...
> >> Anyone got a good design for ground anchors?
> >>
> >> I will need to winch some heavy plant (2 ton or so) on wheels
across
> >> some soft grass, and although there are a few stratigically
placed
> >> trees they don't cover all the places I need to go.
> >>
> >> I've used 'giant corkscrews' in the past but they weren't very
good.
> >>
> >> AWEM
> >>
> > these should give you some food for thought
> > http://www.anchorsupplies.com/accesspries.htm
> > Derek
>
> Those will not work in soft soil or sand, though - the big advantage
of the
> ramp type of anchor is that they hold on any terrain. And fold flat
for
> storage, and are not too hard to make up yourself if you're handy
with a
> stick welder.
>
> Karen
>
>
> --
> "I'd far rather be happy than right any day."
> - Slartibartfast
>
>

Problem is that I cannot use a vehicle as part of the anchor system
due to space and access constraints - the anchor will be a stand alone
item.

AWEM



 
> Problem is that I cannot use a vehicle as part of the anchor system
> due to space and access constraints - the anchor will be a stand alone
> item.

I've looked at the two ground anchors that Anchor Supplies sell. The
large one is very large. Around 1m long thick steel. The pegs are also
about 1m long. You have the option of bolting two together as well. I've
not see one used though.

The small one looks useless, the pegs are very short and will bend under
load. My brother made up a similar anchor about 0.6m long, half way
between these two sizes. Unless the ground is dry and very hard you will
just tear up a strip of soil. They need to go very deep to get any
decent purchase.

Difflock describe an anchor with three long ground stakes set in a row,
each angled away from the load. Rope is tied between the top of one, to
the bottom of the next and so on. Then the load is winched against the
first stake. This might be worth experimenting with.
http://www.difflock.com/offroad/bowyer/winching1.shtml

David
 
I've seen this technique demonstrated in LRO. Apparently very effective.
Stew.

--
1990 Ninety 2.5 n/a D (Jasmine) - the off-road toy
Ex- Freelander Td4 5dr owner - the worst vehicle I have ever had!!!
New Jeep Cherokee Ltd 2.8CRD Auto - freelander replacement.


"DavidM" <[email protected]> wrote in message
news:[email protected]...
>> Problem is that I cannot use a vehicle as part of the anchor system
>> due to space and access constraints - the anchor will be a stand alone
>> item.
>
> I've looked at the two ground anchors that Anchor Supplies sell. The large
> one is very large. Around 1m long thick steel. The pegs are also about 1m
> long. You have the option of bolting two together as well. I've not see
> one used though.
>
> The small one looks useless, the pegs are very short and will bend under
> load. My brother made up a similar anchor about 0.6m long, half way
> between these two sizes. Unless the ground is dry and very hard you will
> just tear up a strip of soil. They need to go very deep to get any decent
> purchase.
>
> Difflock describe an anchor with three long ground stakes set in a row,
> each angled away from the load. Rope is tied between the top of one, to
> the bottom of the next and so on. Then the load is winched against the
> first stake. This might be worth experimenting with.
> http://www.difflock.com/offroad/bowyer/winching1.shtml
>
> David


 
What about using snatch blocks in the winch line to get the direction you
need, only if you have some trees nearby or screw down to concrete with a
plate with a shackle on it.

Rich

--
To reply remove " spam "
"Andrew Mawson" <andrew@no_spam_please_mawson.org.uk> wrote in message
news:[email protected]...
> Anyone got a good design for ground anchors?
>
> I will need to winch some heavy plant (2 ton or so) on wheels across
> some soft grass, and although there are a few stratigically placed
> trees they don't cover all the places I need to go.
>
> I've used 'giant corkscrews' in the past but they weren't very good.
>
> AWEM
>
>


 

"90ninety" <[email protected]> wrote in message
news:[email protected]...
> I've seen this technique demonstrated in LRO. Apparently very effective.
> Stew.
>
> --
I've used three ground anchors lashed together from top to bottom many
times, my anchors are just heavy duty angle Iron, and any strong string/cord
will do the lashing. I tend to run them in a straight line but you can make
arrangements of V pickets. My anchors were cut to about 1.2m in length and
on average about half gets hammered into the ground. I have used them
effectively on many different surfaces and If they will work in a welsh bog
then I think they would be fine on some nice manicured grass.

Regards,

Mark


 
Andrew Mawson wrote:

> Problem is that I cannot use a vehicle as part of the anchor system
> due to space and access constraints - the anchor will be a stand alone
> item.

It sounds as though you are back to the plate and peg design, then. Is
the ground capable of taking pegs?
 

"Dougal" <DougalAThiskennel.free-online.co.uk> wrote in message
news:[email protected]...
> Andrew Mawson wrote:
>
> > Problem is that I cannot use a vehicle as part of the anchor
system
> > due to space and access constraints - the anchor will be a stand
alone
> > item.
>
> It sounds as though you are back to the plate and peg design, then.
Is
> the ground capable of taking pegs?


I'll tell you when I start winching! That's if I survive the snatch
block flying through the air towards me followed closely by a bodged
up ground anchor and a clod of earth and grass!

AWEM


 
Andrew Mawson wrote:

> "Dougal" <DougalAThiskennel.free-online.co.uk> wrote in message
> news:[email protected]...

>>It sounds as though you are back to the plate and peg design, then.
>>Is the ground capable of taking pegs?
>
> I'll tell you when I start winching! That's if I survive the snatch
> block flying through the air towards me followed closely by a bodged
> up ground anchor and a clod of earth and grass!
>
> AWEM

That's quite promising then! The ground is obviously not solid rock or
concrete.

These pegged anchors (plates/ropes) if sensibly installed, tend to 'let
go' gradually and you will have time to stop winching. That's certainly
true if the pull is substantially on the flat or the load cannot run
away. It's not going to be like a wire rope breaking.

The larger military plate and peg anchor which someone mentioned earlier
is good for about 0.5 ton per peg in good ground (from memory).
 
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