Research on unloading deformation of soft rock high slope

Taking the numerical analysis software(ADINA) for large-scale geotechnical engineering as research method, based on unloading rock mass mechanical theory and method, excavation unloading of high slope of a highway is analyzed. The primary condition, excavation condition, unloading condition, reinforcement condition are considered and compared with monitoring data. The strong unloading region next to excavation face and the deterioration of rock mass parameters of the region are considered in unloading rock mass mechanics, the calculating results agree well with the monitoring data. The result verifies the rationality of the method of unloading rock mass mechanics in calculating slope excavation and provides guidance for post-stage operation of slope; and it also can be meaningful and helpful to other projects.