Water stop performance testing device for hydraulic structure joint sealing material

The invention belongs to the technical field of hydraulic structure seepage prevention, and particularly discloses a water stop performance testing device for the hydraulic structure joint sealing material. The device comprises a pressure tank, pressurized water supply equipment, two test blocks, a special mold for fixing the test blocks, two end sockets, a geomembrane and two pressing plates. Thetest blocks are cuboid-shaped, and the seal head is L-shaped. The testing device has the beneficial effects that (1) different joint filling materials can be filled into the testing device; (2) the testing device can be provided with sealing heads with different sizes and specifications, the width of each sealing head is equal to the width of a joint sealing material during testing, and the distance between the top of the vertical edge and the top of the transverse edge of each sealing head is equal to the depth of the joint sealing material during testing, so that the joint sealing materialswith different widths and