[sushirain]

Perhaps landing into a tank of non-corrosive liquid would prevent such collapses? Or on some kind of "glue"/alloy that quickly freezes.

You can also have spearguns firing cords from the top of the rocket to the ground after landing, to hold it.

[vulpes]

One of the main stated goals of vertical landings is so they can do it on other planets/bodies. There are other proven methods of reuse when you have a benefit of an atmosphere and/or infrastructure.

A working vertical landing mode that can also be used on Mars, Moon and other objects in the solar system is one of the major mission at SpaceX. Shipping a giant vat of non-corrosive/conductive liquid to another planet does not appear viable.

[pazimzadeh]

I was thinking that same thing. Maybe not water but some kind of non-conductive gel?