Civil engineering expansion joint waterproof structure

The utility model provides a civil engineering expansion joint waterproof structure which comprises a protection plate arranged between two concrete blocks. L-shaped grooves are formed in the opposite sides of the two concrete blocks correspondingly, and limiting blocks are fixedly connected to one sides of the inner walls of the two L-shaped grooves correspondingly; and the clamping assembly is arranged at the bottom of the protection plate, and the clamping assembly comprises a lead screw rotationally connected to the bottom of the protection plate. According to the civil engineering expansion joint waterproof structure, the two L-shaped clamping blocks can be inserted into the gaps below the limiting blocks at the corresponding positions through angle rotation in the direction away from each other, clamping can be formed, and finally installation of the waterproof structure is completed, so that the waterproof structure can be rapidly installed, the waterproof structure is convenient to disassemble, and th