Abstract: The natural characteristics of hydraulic fill for land is one of the important factors that cause its frequency to be struck by lightning. Based on the theoretical analysis, laboratory test and numerical simulation, the electric shock characteristics of hydraulic fill in Guangxi Beibu Gulf are studied; and then its response rule to the external electric field is explored. Based on the theory of Archie resistivity model and the formula of dielectric constant of soil, the electric shock model of hydraulic fill is proposed; and the main factors affecting the response law between soil and electric field are dry density, water content and salt content. Then the electrical shock test shows that breakdown strength of hydraulic fill has a logarithmic relationship decreasing with the water content and dry density, and the exponential relationship decreasing with salt content. On this basis, combined with the numerical simulation results, it is found that the higher the water content, dry density and salt content, the greater the electric field inside the dredger fill, the more remarkable of the impact field on the dredger fill, and the stronger the response to the external electric field. Among them, the influence of water content and salt content is the main.

Key words: hydraulic fill, reclamation, shock characteristics, electrical shock test, numerical simulation