Research On The Performance And Formula Of Prime-with-pressure Soil-cement Pile

So far, soil-cement piles have been widely applied to ground treatment andwater-resisting curtain. However, the current types of soil-cement piles performspoorly when dealing with peat soil, slit soil and other types of soil that cannot triggera favorable response. Besides, this is also the case when dealing with sandy gravel,which may cause difficulties in construction. Therefore, prime-with-pressuresoil-cement piles can solve above problems. This research paper is based on thereviewing existing literature and applying theory analysis, research methodology andfiled engineering practices. The research findings are presented below:1.Explaining the pile forming of prime-with-pressure soil-cement piles,construction technology, construction attentions and other problems that found in theconstruction field.2.On the respect of construction parameter, cement-soil formula has been testedand analyzed. The result shows the most reasonable formula:cement mixing ratio is20%,“cement mixing ratio” is11.76%, from which derives the reasonableformula—cement added amount150g+soil added amount750g+stone chips addedamount350g+fly ash added amount175g.3.Under the condition of different curing condition, different ages and differentfreezing-thawing cycles of prime-with-pressure soil-cement piles, its unconfinedcompressive strength has been tested and analyzed. The results shows:(1)The unconfined compressive strength of prime-with-pressure soil-cementpiles will decrease when the freezing-thawing cycles increase. The pace of decline isinitially accelerates and then tends to slow down.(2)Within fixed freezing-thawing cycles, prime-with-pressure soil-cement pilescan be negatively affected by freezing-thawing cycles and the most obvious negativeeffects are found in the early stage of cement-soil strength formation. With a longerage, the freezing-thawing cycles produces a smaller effect on it.(3)To what extent the freezing-thawing cycles affects the pile strength ofprime-with-pressure cement-soil piles is determined by water content. With a higher level of water content, the more significant effects can be observed, and vice versa.Moreover, freezing-thawing cycles can slow down the increase in the pile strength ofprime-with-pressure soil-cement piles.(4)With a longer age, a higher level of pile strength of prime-with-pressuresoil-cement piles can be achieved. Besides, the growth rate accelerates in the earlystage and then begins to slow down.