Deep Soil Cement Mixing Pile Reinforcement Of The Technical Study Of Fly Ash Embankment

The paper sorts out calculates, contrasts and analyzes the test data for test research of soft subgrade soil-cement deep mixing pile compound foundation in Taiyuan northwest loop expressway K33+718-K33+830 section flyash fill zone, including the engineering geological conditions of flyash fill zone, analysis and research of flyash physical and chemical characteristics, unconfined compressive strength test of soil-cement mixing pile indoor and pile butt speciment, filed making-pile test, static load test of single pile and compound foundation, cower strain dynamic detection of single pile and pile-soil standard penetration test etc.It concludes that the flash is a kind of material similar as volcano ash in the physical and chemical characteristics,the mixing pile shaped by flyash, whose pile strength is improved with the increase of cement admixture load capacity and displacement of soil-cement single pile and compound reinforced material shaped by mixing flyash soft layer, which meets with the requirements cf expressway and common building to compound foundation.It is necessary for flyash soft layer to pave underlayer at the top of deep layer mixing reinforced material.It is feasible for using deep layer soil-cement mixing pile to treat with soft foundation in flyash fill zone, which has a definite significance for highway construction, building foundation treatment and environmental protection in the coal-producing area of the North in our country.