A sheathed frame includes a support frame comprised of a plurality of interconnected support components, a pool liner comprising a pool bottom and a pool wall connected to an outer edge of the pool bottom and extending upward, an upper edge of said pool wall hanging on said support frame and disposed on an inside of said support frame, and at least one sheath disposed on a junction between at least two of said plurality of interconnected support components. Sheaths are respectively provided at the junction of a horizontal side pipe and a T-shaped pipe joint of the frame pool and the junction of a support pipe and the T-shaped pipe joint.