Piled raft structure with good resistance to seepage and buoyancy

The utility model relates to a piled raft structure with good resistance to seepage and buoyancy. The structure is characterized in that a pre-stress hollow tube segment is arranged on the upper part of each borehole filling pile; the pre-stress hollow tube segment and the borehole filling pile are coaxial; a steel reinforcement cage of the borehole filling pile passes through the pre-stress hollow tube segment and extends into a raft plate foundation to be connected to steel bars inside a raft plate; internal connecting bars are arranged on an inner side of the pre-stress hollow tube segment; a sand cushion layer and broken stone blind ditches are laid above foundation soil; the raft plate foundation includes a horizontal waterproof player, a soil cement board and the reinforced concrete raft plate arranged successively from bottom to top; and reinforcement material is arranged between foundation pit fending piles and side walls of a basement for fixed connection. The structure can not only reinforce the int