Transverse joint leakage treatment method for concrete gravity dam

The invention relates to a transverse joint leakage treatment method for a concrete gravity dam. The transverse joint leakage treatment method for the concrete gravity dam comprises the steps that 1,grouting is carried out on induced cracks of a joint face, hole diameters of grouting holes distributed in the induced crack are 20 mm-25 mm, the induced cracks at the upper end and the lower end in agrouting area segment are drilled to form grout stopping holes before a grouting pipe is buried, ventilation checking is carried out to ensure that the holes communicate with each other well, the maximum pressure is controlled within the range of 0.15 Mpa-0.2 Mpa, grouting is carried out from bottom to top, the grouting holes in the upper part also serve as vent holes to be used, and the groutingholes where grouting is completed in the lower part are tightened in time; and 2, two days later after joint face grouting treatment, joint opening caulking treatment is carried out, the part, in thegrouting area, of a transve