为了合理利用高含水量淤泥与废弃泡沫塑料，以渭河淤泥为原材料制成轻量土，通过密度试验和无侧限压缩试验，分析密度、无侧限抗压强度与水泥掺量、泡沫塑料掺量、龄期的关系，并建立配方公式。结果表明：轻量土密度主要受泡沫塑料掺量影响，随着泡沫塑料掺量的增加轻量土密度减小，理论密度与实测密度之间误差较小；轻量土的无侧限抗压强度受泡沫塑料掺量、水泥掺量、龄期影响，无侧限抗压强度随着水泥掺量的增加而增大，随着泡沫塑料体积比的增大而线性减小，随着龄期的增加而增大，但龄期60 d以后强度基本稳定；综合考虑密度、强度的影响因素，固定含水量为92．04％和龄期为28 d，利用线性关系拟合法和指数关系拟合法，建立了两种经验配方公式。%In order to make use of high water content sludge and waste plastic foam,light weight soil was made from Weihe River sludge. Through density tests and unconfined compressive strength tests,the relationships between density and cement mixed ratio,foam mixed ratio and age and the relationships between strength and cement mixed ratio,foam mixed ratio and age were researched. The results show that a) light weight soil density is mainly affected by foam mixed ratio,with the increase of foam mixed ratio,the density of light weight soil is de-creased and the density error between theoretical value and measured value is smaller. b)The unconfined compressive strength of light weight soil is mainly affected by foam mixed ratio,cement mixed ratio and age,unconfined compressive strength increases with the increase of ce-ment mixed ratio,and the linear decreases with the increase of foam mixed volume and increases with the increase of age,but after age 60 d intensity is basically stable;c)Considering the influence factors of the density and strength,fixed moisture content is 92. 04% and age is 28 days,using linear fitting and exponential relationship fitting method,two kinds of prescription formula are established.
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