The analysis is made of the compaction grouting fluid with the parameters relevant to the dispersion radius, such as pump pressure, volume, viscosity, etc.

Study on grouting diffusion radius of exponential fluids;

Study on grouting diffusion radius of Bingham fluids;

The key technology of chemical grouting by breaking the wall to prevent leakage are the followings: choosing the chemical material, determining the grouting pressure, estimating the diffusion radius of grouting liquids, arranging grouting holes and calculating the grouting quantity.

Based on the assumption of exponential fluid and narrow plate model,formulas for calculating the flow velocity,grouting flow,grouting pressure difference and penetration radius in fracture grouting were deduced.

The theory analysis and the results computed by 4D code show that in many cases the influences of the stagnation zone effect are not important because in those cases the beam spreading radius induced by thermal distortion in the stagnation zone is smaller than that induced by the diffraction effect.

The results show that the buoyant velocity,the buoyant height,the buoyant angle,the temperature expansion radius and axial temperature of the bubbly thermal wake are remarkably influenced by the size of the.