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Started By
Message
Extending a boat launch ramp
Posted on 8/17/12 at 6:03 pm
Posted on 8/17/12 at 6:03 pm
I have a friend with a camp in grand isle. It has a nice concrete boat ramp but we think it doesn't extend far enough into the water to launch larger 30+ ft boats.
Any suggestions on how to extend the ramp farther and deeper into the water? We have access to concrete, excavators, lift bags, etc but I don't know how to approach this one.
Thanks in advance.
Any suggestions on how to extend the ramp farther and deeper into the water? We have access to concrete, excavators, lift bags, etc but I don't know how to approach this one.
Thanks in advance.
7
Posted on 8/17/12 at 6:08 pm to mohalk
Sand Bags and Sump Pump?
Posted on 8/17/12 at 6:12 pm to mohalk
Concrete cures not dry. It sets up under water just a little different to work with.
Posted on 8/17/12 at 6:19 pm to mohalk
I saw one made one time, they built it on land framed it up, rebar etc, poured let it set and then used a dozer to push it in the water...
Posted on 8/17/12 at 8:05 pm to mohalk
Place 80 lb bags of easy crete like bricks. In the bag, paper and all.
Posted on 8/17/12 at 9:57 pm to Geauxtiga
quote:
Place 80 lb bags of easy crete like bricks. In the bag, paper and all.
yep.
I've even seen it used this way to build a bulkhead...IIRC on Bayou Lacombe.
Posted on 8/17/12 at 10:02 pm to Geauxtiga
What keeps the 80lb "bricks" from eventually being swallowed up by the earth like the limestone on my driveway?
Posted on 8/17/12 at 10:04 pm to mohalk
crushed oystershells
Posted on 8/17/12 at 10:19 pm to 007mag
quote:Find a limestone that's 18 X 28, weighs 80 lbs, and throw that in your drivewy. Let me how long it takes to be "swallowed up".
What keeps the 80lb "bricks" from eventually being swallowed up by the earth like the limestone on my driveway?
Posted on 8/17/12 at 10:38 pm to Geauxtiga
My driveway isn't underneath Barataria Bay and my limestones don't weigh 80lbs. I know how quick my fat arse gets swallow up by the earth tryin to wade in the marsh but maybe Grand Isle has a hard bottom. My main concern would be the bricks settling unevenly or shifting causing potholes to sink into and/or obstructions to hang up on. I don't know, I'm just speculating.
This post was edited on 8/17/12 at 10:40 pm
Posted on 8/17/12 at 10:50 pm to 007mag
quote:I'm not really sure so can't answer all those questions.
My main concern would be the bricks settling unevenly or shifting causing potholes to sink into and/or obstructions to hang up on. I don't know, I'm just speculating.
It's obviously not the most ideal way but if it's just to extend it 10 feet or less.
I've seen it used at Saline, to widen one, and in those big drainage canals that run through towns, to stop the erosion. In both cases I was shocked at how well it worked.
Posted on 8/17/12 at 11:08 pm to mohalk
Pour a square slab however long you want it and then push it in with the excavator and sink it
Posted on 8/18/12 at 5:40 am to wickowick
quote:
I saw one made one time, they built it on land framed it up, rebar etc, poured let it set and then used a dozer to push it in the water
This is how it is done. But, a trick is to put plywood on the bottom when framing it. Once it is set, the plywood makes it easy to slide it and place.
Posted on 8/18/12 at 7:57 am to fishfighter
I third this motion. A neighbor did this. Pour a slab about 4x 10 and push it down. Continue until you get where you need to be.
Posted on 8/18/12 at 8:05 am to mohalk
30ft plus, why not just launch at a marina?
Posted on 8/18/12 at 8:07 am to FriscoKid
The only issue I would see with pouring slab and pushing in would be hwo do make sure it matches up with existing slab well? Once there how do you make sure it stays closely approximated to exisitng slab?
Posted on 8/18/12 at 11:13 am to Bleeding purple
quote:
Once there how do you make sure it stays closely approximated to exisitng slab?
Add some big arse eyebolts at the corners and hook them with a cable once you slide it in place.
Posted on 8/18/12 at 12:00 pm to fishfighter
That was my thought too but how do you add the eyebolts to the the exisitng slab? You cant very well drill underwater.
Maybe you could stake it in place using the eyebolts. I would want to make sure they were low profile enough that if I ran over them though there would be no tire damage.
Maybe you could stake it in place using the eyebolts. I would want to make sure they were low profile enough that if I ran over them though there would be no tire damage.
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