The geosynthetic reinforced soil integral bridge, as a novel type of abutment, demonstrates significant application value in small-span bridges and culvert engineering. At present, the research on its operational mechanisms is limited, particularly with regard to the bearing capacity characteristics of abutments, which have seldom been studied. Taking the ?erovinci Bridge in northern Slovenia as the prototype and based on abutment static load test technology, this paper carries out static load tests on an integral-wall geosynthetic reinforced soil abutment model. The analysis encompasses the settlement at the top of the abutment, the displacement of the facing panel, the horizontal displacement of the soil behind the facing panel, the distribution of reinforcement strain, and the pattern of the potential failure surface. The measured tensile force of the abutment reinforcement is compared with the calculated values recommended by three codes. The results indicate that under the action of large load, the junction of the front wall and the two wing walls is the weak link of the structure; under the maximum load, the top settlement of the abutment does not exceed the serviceability limit and strength limit recommended by the code. The horizontal displacement of the middle panel of the abutment is the largest, and the wall surface is bulging in the middle as a whole; the maximum soil displacement behind the front and wing wall panels occurs at the top of the model; the maximum strain of the reinforcement is always between 0.5 m and 0.65 m, and the reinforcement strain decreases linearly with the increase of distance away from the panel. Under specific loading conditions, the maximum strain of longitudinal reinforcement remains below the specified limit; the potential failure surface of the abutment develops, with the lower part close to the Rankine failure surface, and the upper part being the failure surface of the back edge of the non-bearing area; the calculated stiffness values agree well with the measured maximum tensile force of the reinforcement.