Effects of High-Polymer Grouting for Emergency Treatment of Landslides

ABSTRACT This study introduces an innovative approach to emergency treatment of landslides using high-polymer slurry characterized by its rapid solidification, requisite strength, and consistent properties. Model experiments and numerical simulations were conducted to assess the effectiveness of high-polymer, high-pressure grouting for landslide mitigation. The findings demonstrate a substantial improvement in both slope displacement and bearing capacity following high-polymer grouting. A semispindle-shaped solidified gmass, approximately 50 cm in axis length, formed between the sliding bed and mass after injecting 300 mL of high-polymer slurry at a pressure of 15 MPa. The cohesive force of this structure was measured at 46.8 kPa, with an internal friction angle of 39.4 degrees, resembling an embedded antisliding key positioned near the sliding surface. This structure effectively enhanced slope-bearing capacity and reduced slope displacement. The measured bearing capacity of the slope model increased from 26 kPa before reinforcement to over 48 kPa, marking a significant enhancement. The simulated results closely align with measured data, with the simulated landslide morphology corresponding well to observed outcomes. These findings validate the feasibility and effectiveness of the proposed high-polymer grouting technique in the emergency treatment of landslides.