Soil Reinforcement Impact Load Two Different Energy Consumption Fill Foundation Law

Research on the laws of dynamic compaction energy consumption has a far-reaching significance of to improve the dynamic compaction theoretical and to guidance the dynamic compaction engineering’s practice, but so little research in this respect until now. This paper has made a laboratory studying of red sandstone weathering soil and clay which were collected from a practical engineering project in Ganzhou urban district. By setting the constraint conditions, energy consumption laws of single point of ram on the two kinds of soil and full impact on the two kinds of soil were studied, and the energy consumption of the two types of soil are analyzed, then get their common points and different points. The reinforcement effect were detected by using dynamic sounding method and surface wave method, prove it is suitable of take the dynamic compaction method to process the analogous foundation soil. Through the experiments and analysis, the following conclusions can be obtained.(1)Single point tamping clay soil is more conducive to the tamping energy transfer to the deep of soil than red sandstone weathering soil, but the tamping energy in vertical direction of the consumption for the tamping energy increases with the increase of the quantity is small, as the red sandstone weathering soil sensitive.There are a nonlinear relationship between the consumption of tamping energy and the depth of red sandstone weathering soil or clay, but the clay with soil depth change more evenly, tamping can more easily to the deeper.There are certain influence depth of tamping energy spread in soil, in this depth, the consumption of tamping energy for the soil consolidation is very little, and the ratio for total tamping energy is getting smaller and smaller.(2)The consumption of tamping energy in horizontal accounted for the total tamping energy a more smaller ratio than red sandstone weathering soil when it is single point tamping. Compaction energy in the horizontal direction for soil compaction energy is encrypted with the depth increases gradually decreased, and the decreased amplitude with depth increasing from small to big and then big to small. Lateral dynamic extrusion effect is more obvious*the consumption of tamping energy in the horizontal direction for red sandstone weathering soil encryption is increasing with the increasing of total tamping energy.(3)The energy consumption for the vertical displacement of soil particle as the foundation depth increases more and more small when full tamping, and the decrease rate is more and more small, clay’s change of decrease is smaller than red sandstone weathering soil. The more close to the full tamping center plane, more uniform energy consumption of full tamping for the vertical displacement of soil particles increases, more far more discrete, consumption on soil encrypted tamping energy with increase in depth of total energy of red sandstone weathering soil is more and more big, clay is first increased and then decreased. (4)The energy consumption in the soil’s encryption of full tamping at the beginning is the most, utilization rate is the highest, the characteristics of the red sandstone weathering soil is more obvious than that of clay. When the soil compaction to a certain extent, the downward energy transfer became more and more difficult, the energy in the vertical path of consumption became less and less, because the soil’s surface has formed the hard crust at this time, a large part of the energy to be converted into elastic potential energy. Clay compared with red sandstone weathering soil, under the same total tamping energy function, the margin of loss has became smaller with the increasing of compaction energy while tamping energy be passed down.