Saturated confined water super-thick sand layer underground diaphragm wall profile steel joint wall brushing device

The utility model discloses a saturated confined water ultra-thick sand layer underground diaphragm wall profile steel joint wall brushing device which comprises a box body connecting structure, a connecting lug plate and a brushing device, the box body connecting structure comprises a front box plate, a rear box plate, a left box plate and a right box plate which are welded into a whole, one side of the connecting lug plate is fixedly connected with the front box plate, and the other side of the connecting lug plate is fixedly connected with the left box plate. The connecting lug plate is fixedly connected with a grab bucket of the underground diaphragm wall trenching machine, the brushing device is fixedly connected to the outer side of the rear box plate, and a brush head of the brushing device faces the outer side of the box body and is used for brushing the underground diaphragm wall profile steel joint. According to the utility model, the box body connecting structure is fixedly connected with the grab