A physical modeling-based study on the control mechanisms of Negative Poisson's ratio anchor cable on the stratified toppling deformation of anti-inclined slopes

With ongoing increases in excavation depth, the large-scale toppling instability failure of stratified anti-inclined slopes is gaining wide attention. To address problem controlling deformation with traditional small-deformation materials, this paper takes results existing studies on extraordinary mechanical properties engineering-scale Negative Poisson's ratio (NPR) anchor cable as a theoretical basis, and develops model-scale NPR according to similarity theory. Relying self-developed “engineering disaster model experimental system”, physical modeling-based experiment explore reinforcement mechanism slope using ordinary cables performed. The monitored static strain data acquisition equipment, an infrared thermal imager, tension sensors, digital speckle correlation method (DSCM) displacement field measurement equipment. evolution field, temperature force are obtained during model. By comparing these parameters images from both test characteristics two sides slope, which were reinforced different types cables, determines mechanisms governing cable. In addition, also proves that can be used monitor sliding throughout excavation, lays foundation for application monitoring technology advanced warning.