To explore the bolt-grouting method of deep roadway under three-dimensional unequal ground stress, a unidirectional coupling model surrounding rock plastic failure and grouting diffusion considering influence excavation disturbance stress was established. Spatial evolution characteristics diffusion, impact spacing row bolts/cables on grout were simulated by using numerical method. The results r...

At the end of shaft penetration under protection ice barrier and termination process freezing rocks, transition period from to thawing begins. First all, tubing support trunk layer rocks adjacent concrete are subjected thawing. this time, water is pumped through grouting holes in check tightness column, after which performed with cement mortar fixed space. Thus, an integral part work on waterpr...

Microbially induced calcium carbonate deposition (MICP) restoration technology has good effects and low environmental pollution compared with traditional methods, this been applied in actual projects. However, grouting components such as bacterial solutions are easily lost vertical cracks due to their viscosity well self-weight. In paper, were repaired using microbial mineralization by sealing ...