Numerical Simulation Analysis Of Blasting Compaction Technology In Soft Soil Subgrade

Blasting is regarded as a convenient and effective method in the field of architecture,and it is currently being used in many engineering fields.With the maturity of blasting technology,some scholars have put forward the use of blasting method to deal with soft soil subgrade.The blasting compaction method for the treatment of soft soil subgrade is quick,low cost,simple equipment and so on,and it is paid more and more attention in the geotechnical engineering.However,at present,the research on the extrusion principle of blasting compaction method is not deep enough,and the control of blasting parameters is short of theoretical basis,that is why it has not been widely used.Through a combination of theoretical analysis,numerical simulation and experimental study,the paper discusses the effect of blasting compaction principle,soil parameters,explosive quantity and buried method on the blasting results.And on the basis of this,the selection of the parameters of the blasting hole is discussed,which provides theoretical support and data reference for the blasting compaction construction.The main content of this paper is:(1)The mechanism of blasting compaction in soil is analyzed,which provides theoretical support for numerical simulation and outdoor test.(2)ANSYS/LS-DYNA software is used to establish the soil model of soil in the blasting numerical simulation analysis to discuss the impact of the degree of compaction,water cut,explosive quantity and buried method on the blasting effect,and the validity of the numerical simulation is verified through the comparison with the experimental data.(3)Based on the finite element numerical simulation analysis and the analysis of outdoor blasting test,the blasting hole layout and parameters are discussed and analyzed.Based on the principle of blasting hole section and vertical section,the design and layout parameters of the vertical section and the horizontal plane are respectively discussed,and the feasibility is proved by the outdoor blasting construction.