sleepers connecting

Hi all,
so the lawn is currently being levelled and re-turfed. Once that's sorted, I intend to make a raised border all the way round.
Now, laying the things down level isn't going to be an issue, but connecting them together is something I've wondered about - I don't really want to see any fixings if I can help it.
Any suggestions? anyone used anything I should look at?

 

I have just done similar. I connected sleepers by cutting a mitre in both ends so they overlap. 6 inch sleepers so cut out a 3 inch square in both, top on one and bottom on another to form an overlap. Then drill through and secure with long screws and recess.

I also used a length of rebar, bent over then hammered into a hole in the underside and cemented into the ground.

This video was useful, but as I was laying my sleepers on the bottom and not sides the mitre was the other way.

 

Drill pilot hole to 20mm to allow head of fixing to be driven below surface .

 

fantastic, just what I was after. Thanks very much.

 

just an additional - did you cement the anchors in too? just seems overkill - I'll be laying mine as he has in the video, was thinking of merely levelling the ground, and laying some gravel down, lay the sleepers on the gravel then drill it all together.

 

I did cement them in. Adds some rigidity