NUMERICAL SIMULATION OF AFFECTED ZONE BY POWDER EXPLODING IN SINGLE HOLE IN SOFT SOIL TREATMENT

The consolidation method by exploding is a new treatment technique in soft soil ground.To analyze the variation of the exploding effect in ground,this paper presents numerical simulation of single hole powder exploding in soft ground through finite element method.On the basis of verifying the result of calculation with that of in situ measurement,the paper examines the main affected zones in the soil due to powder exploding in single hole.Different cover pressure and explosive dosage are further studied.For the problem of single hole powder exploding in soil,the ALE algorithm is used to resolve the aberrance of mesh.The result indicates that the time for the cover pressure taking effect was after an exploding,not on the exploding.Dissipation of pore water is the most contributing factor for the effectiveness.The explosive dosage has important influence on the spacing of holes and vertical drainage channels.