Dwelling Rubble Stone Wall following Vehicular Impact

[gmannix1000]

Hi All,

We're investigating damage on an old 2-3ft thick rubble stone with mortar Gable Wall that was subject to a fast vehicular impact. Based on a visual inspection, lots of cracking which are new sharp unpainted cracks distinguishing it from older cracks and bulging of the lime render away from the wall. Rubble is loose in the impact zone. Obviously would be near to impossible to check the condition of the internal condition of such a wall but would anyone have any other thoughts or advice in this situation.

Recommending a new replacement of the wall obviously seems the best and safest solution but wondering if anyone has come across something like this before?

 

[milkshakelake]

I've come across rubble walls that cracked and completely displaced from one another during settlement, which is similar to your situation. They were usually thinner, like 14" to 16". If the crack didn't go all the way through, you can use helical stitch ties to stitch it back together. Will need waterproofing. If it's at a corner, you can build up a 12"12" or larger concrete column and put rebar into each side.

Since your wall is very thick and you don't want to replace it, you could form (or shotcrete) a new reinforced concrete wall in front of it, connecting the undamaged areas together with rebar and epoxy. Also rebar+epoxy into the cracked wall. The old cracked wall carrying gravity loads will transfer some of its load to the new wall. The amount of overlap is based on engineering judgment but I'd say about 4' on each side of the cracked sections. This is like the helical stitch tie idea but bigger.

Definitely would recommend removing the loose rubble before installing epoxy+rebar so that the new concrete can fill those gaps.

 

[RPGs]

2-3ft thick rubble stone with mortar

I cant get past this--what kind of building are you looking at?

 

[gmannix1000]

It's a dwelling but was an old old farmhouse.