Experimental Research On Materials Of CFG Pile Of Coal Gangue Type Composite Foundation

Coal gangue is industrial solid residues which are discharged when coal is excavated and washed in the production of coal mine,and is one of the most industrial solid castoffs.In our country,annual discharge of coal gangue is nearly 100 million tons,and the gross amount reaches more than 3000 million tons,what is worse,the amount is increasing year by year.However,the recycling tatio of coal gangue is less than 20 percent.It is the available resources of urgent development. CFG pile (cement and fly ash gravel pile) composite foundation is the foundation of a new processing technology by China Academy of Building Research in the 20th century, late 80.The technology of CFG pile composite foundation has sueh characterisities of rapid-construetion speed,short-period project,easy quality control and economically.This topic in CFG pile (cement and fly ash gravel pile) basis,Research adopts inexpensive spontaneous combustion gangue,replacement of materials of CFG pile gravel and stone crumbs to do aggregate, Optimal mixing ratio,The formation of curing strength of pile. Pile,Between pile and soil pile and Serveral problems layer To create a new composite foundation. Reducing construction cost,to reduce pollution,expand the comprehensive utilization of coal gangue,to improve social comprehensive benefits.This topic for CFG pile of coal gangue type ratio of raw materials to carry on the detailed indoor simulation tests,and obtain corresponding results. Find a CFG pile of coal gangue type materials of reasonable proportion.In addition the paper theoretically expounds the reinforcement mechanism of CFG pile of coal gangue type composite foundation.Because the limitation of experimental condition and experimental content,the results can not completely reflect active rule and reactive mechanism of flyash and gangue.But the phenomena disclosured by this tests will be helpful for the application of flyash and gangue,and be useful for promotional application of dndustry waste slag like flyash and gangue in composite foundation.