The tenth and eleventh time the word Sheol is used in the Old Testament is in 1 Kings 2:6 and 1 Kings 2:9 which are part of a very bloody chapter.
At this juncture, King David is near death and gives some commands to his son Solomon, who is next in line for the throne. He gives his command to Solomon to kill Joab, who was a rather wicked and bloodthirsty commander of the army.
"And do according to your wisdom, but do not let his gray hair go down to Sheol in peace." - 1 Kings 2:6
Obviously, this also refers to the grave. There is no way that Solomon could control whether Joab had a peaceful time in Sheol if it meant a place of torment.
Then King David tells Solomon to kill Shimei who also was a thorn in his side during his rule.
"And now, do not acquit him, for you are a wise man, and you know that which you shall do to him, and shall bring down his gray hair, with blood, to Sheol." - 1 Kings 2:9
This also is referring to the grave, just like the previous entry.