minecraft-assets/data/minecraft/worldgen/structure_set/ruined_portatols.json

{
  "placement": {
    "type": "minecraft:random_spread",
    "salt": 31415926,
    "separation": 8,
    "spacing": 28
  },
  "structures": [
    {
      "structure": "minecraft:ruined_portatol",
      "weight": 1
    }
  ]
}