Pier attachment on a sandy beach, at the sea, on an island

[lesticx]

Hi!

I need to attach a pier to a sandy coast of an island. My summer house is there, it's on an island, only accessible by a small boat, and there is no electricity. So the only kind of concrete I really want to use is dry concrete, which can be mixed with a shovel. This is after all a rather small project, I don't really want to buy a huge concrete mixer and haul it over there..

The place were the pier attachment will be is at the moment under water. The pier itself is a floating type. This place will most probably be dry sometime in autumn, when the waters are low, but I'd still like to build it properly now.

My idea as of now:
- make a kind of edges from concrete on the dry area of the beach. Like a box without the bottom and the top. Then carry this (with the help of a few people) to the place where the attachment will be.
- Get some steel rods, use a sledgehammer to hammer then deep into the seabottom inside this "box"
- try to get most of the seawater out of this "box"
- then fill the "box" with concrete

Would this work? Do you have any better ideas for this?

 

[cvg]

you are setting this right on the sand. I'm afraid that wave erosion will undermine it and it will then sink or lean. I think you need a foundation that is set below the scour depth. Most of these I have seen or set on wooden piles which go quite a ways below the surface.

 

[kelowna]

cvg is right

Why don't you go for a floating dock anchored to the shore with cables? That would eliminate the problem

 

[apsix]

As to concrete mixing; hire a generator.