Investigation About Composite Filling And Pre-grouting Material And Spreading Theory

By using wind-blown soil,fly ash,clay,a small amount of cement and addition agent as raw materials in this paper,the optimum dispensation formula and spreading theory about filling and pre-grouting of composite filling material were studied to have important practical significance to large filling and pre-grouting project.Based on analyzing and determining basic characteristics of every raw material,the dispensation tests had been performed about clay-cement paste,fly ash-cement paste,fly ash-clay-cement paste and wind-blown soil -clay -cement paste,and their performance figures were tested systematically and obtained perfectly so that a reasonable dispensation formula was get to be used in filling project.On the theoretical investigation,spreading theory about filling and pre-grouting was set up based on two-phase flow principle so that new method was put forward to determine equitably filling and pre-grouting parameters.