On 16th Dec 2021 at around 13:35 Hrs in the RMS-06 location, the crew was engaged for draining the water from the drain pit. A helper (IP) of the crew was moving into the barricaded area to support his team member to relocate the flexible drain hose (3” dia), during the movement the helper leg tripped on a hard barrier support pipe which resulted in loss of balance, and he fell on the ground planting his left hand to the ground and onto the wooden runner. This fall caused severe pain and swelling on the wrist of the left arm. Further medical examination revealed colle's fracture of the left radius. Why it happened/Finding : As the helper was standing close to the barricade, the helper did not notice the barricade's support pipe, so while moving forward he tripped on the barricade's pipe and fell on the ground. Not focused on the surrounding obstruction