According to the problem of failure and instability in roadbed and cutting engineering of underground karst cavity,on the basis of inhomogeneous elastic damage model,this thesis propose the FEM back-analysis from instability-strength degradation,to describe inhomogeneity of material suppose that the material parameter obeys statistical distribution.

Real-time simulation for slope engineering of highway;

Research on treating measures of expansive soil cutting slope;

Replacement thickness analysis of cutting in expansive soil area;

Smooth blasting construction in side slope of cutting at yishui expressway;

Through geological investigation and field monitoring of Ningming tertiaryi limnic weathered mudstone and residual soil cut slopes of Nanning-Youviguan,Express the characteristics of water content,temperature,shrinking coefficient,swelling quantity variation under 50 kPa with depth of natural slopes and cut slopes in swell and shrinking active zone of expansive soil were studied.

This paper expounds the technical features,construction processes and construction points of the prestressed anchor rope construction technique for the high-cut slope of the road engineering,and puts forward some treating measures for the common problems and some points for the construction safety.

Deformation and stability of soil cutting side slope;

Discussion on new technique for protection of rocky cut side slope and sodding.;

Construction and technical & economic analysis of high side slope cut of additional second track to existing electric railways;