摘要
In order to investigate the effect o f some factors on the unconfined compressive strength(UCS)for composite soil stabilizer-stabilized gravel soil(CSSSGS),the orthogonal test is adopted to set up the experimental scheme.Three levels o f each factor armconsidered to obtain the change laws o f UCS,in which the binder dosages are8%,10%,and12%;the curing times ae7,14and21d;the gradation nae0.3,0.35and0.4;and the degrees of compaction are95%,97%,and99%.The range analysis clearly indicates that the influence degree o f the four factors on UCS is in such an order:dosage,age,gradation,and degree o f compaction.The variance analysis shows that only the composite soil stabilizer dosage can significantly affect UCS.In road construction,the examination o f composite soil stabilizer dosage and base-course maintenance should be given much more attention to obtain satisfactory base-course strength,compared w ith gradation floating and the change of degree o f compaction.
为明晰多种因素对复合型土壤固化剂稳定碎石土基层强度的影响情况,采用正交试验,研究了当固化剂剂量为8%,10%,12%,养护时间为7,14,21d,级配粗细n为0.3,0.35,0.4及压实度为95%,97%,99%时无侧限抗压强度的变化规律.极差分析结果表明,上述4个因素对无侧限抗压强度的影响程度由大到小为:剂量、养护时间、级配粗细、压实度;方差分析结果表明,只有固化剂剂量能够显著影响基层无侧限抗压强度.因此,在该基层施工过程中,相对于级配和压实度,应加强施工过程中固化剂剂量的控制以及基层养护,以获得满意的基层强度.
基金
The National Natural Science Foundation of China(No.51108081)
