Study Of Dynamic Compaction Impact In The Role Of Red Sand Rock Utility And Energy Consumption

Red sandstone is widely distributed in our country and used for backfill foundation.Impact load have been widely used in foundation reinforcement.Researching of the effects of actions under the impact load is backward in red sandstone soils.In article,red sandstone soils is compacted by compaction test apparatus,which had been retrofitted and research the effects of actions,reinforcement effect and transfer rule that come out when impact load affect on the red sandstone soils.Get the following main conclusions:(2)Research reinforcement effect of the soil foundation under dynamic compaction construction simulated a variety of tamping points distances.Change the tamping point interval will not affect the impact compaction effect,.when the effective lateral extrusion effect still work on the red sandstone soils. The number of Tamping points per unit area decrease that means Shorten the time that be used in aiming at tamping points.therefore it can save construction cost.When increasing tamping points distances(2)Increasing the lap hammer seal area can not take effect on improving full tamping soil consolidation effect.While decreasing the lap hammer seal area can heighten the depth of full ram,and the surface ground’s tamping effect of ram remain unchanged.It also can save a lot input of manpower and material resources in the construction.(3)Fluctuation of coefficient of nonuniformity is around the initial of coefficient of nonuniformity.internal Following the change of the particle breakage friction angle is that at first, increasing and then decreasing at last,but change of the soil compression modulus is that increasing ait first and keep the same to the last.The researched result is that In construction of backfill soil,grain composition should be mixed in good condition in order to assure the strength, stability, and low compressibility of the soils.decreasing the internal friction angle can reduce soil shear strength.The results of those study has the significance of theory and practice on enriching the logic of impact load consolidating subsoil.Guiding the practice impact load consolidating subsoil and optimizing the foundation design in the effort of impact load...