Numerical Simulation of Soft Foundation Improvement by Explosion

For obtaining mechanics of silt,crushed stone and explosive interaction and optimizing parameters of explosion design for foundation treatment,a numerical study on foundation treatment by explosion is presented by hydrocodes based multi-materials Euler formulation.Drill and geology radar in field test are also be used to verify the effect of foundation treatment.The result shows that diffusion of shock wave in silt,crushed stone and non-cohesive soil is obviously different.Buren depth of charge should be in the range of 1.0~2.0 m upside silt layer,and explosion distance should be determined by mass and burden depth of charge.Layer mixed with silt exists in section after explosion,and density of non-cohesive soil increases about 20%.The main effect of explosive lies in pushing out silt and forming crater,and squashing crushed stone to form steep slope and then cramming them into crater,so purpose of exchange silt can be achieved.