Self-drilling hollow bar anchors are extensively employed in geotechnical engineering for slope stabilisation and landslide prevention. This study investigates the effect of anchor embedment length on the interaction with the surrounding soil mass and the resulting bearing capacity. Laboratory model tests were performed using anchor models with embedment lengths of 30, 60, and 90 cm, installed in uniformly compacted sand. Displacement fields were recorded using the particle image velocimetry technique. The tests revealed well-defined zones of soil–anchor interaction that varied in geometry, volume, and distribution along the anchor length. The results demonstrate that increasing embedment length leads to a reduction in specific bearing capacity, consistent with previously reported findings. These experimental data offer a foundation for future full-scale studies and may enhance bearing capacity estimation methods by incorporating the geometry of the interaction zone, which is influenced by anchor embedment depth.
Chernyatin et al. (Wed,) studied this question.