I've had a similar barreling issue with a 12 month old I have.
I ended up using a pack & play for her to go into at certain times of the day when the older kids are doing particular activities. She is out and about more than she's in the pack & play as I don't want to curb her development It's also come in very handy when we've wanted to do outside play in the snow & she clearly can't move around & I need my hands free to help the other dck's stay safe
I like safety gates, but the way my house is designed it would prevent the other children being able to move around as freely.