To investigate the bonding performance between polymer waterproof coating (PWC) and expansive soil, 40 groups of expansive soil pull-out tests under different working conditions were carried out in this study. The variables considered included soil water content (12–27%), soil density (1.6–2.0 g/cm3), and PWC coating thickness (0.8–1.5 mm). The effects of these factors on bonding performance were…