SH及石灰改良黄土抗冻融循环特性研究
首发时间:2017-12-07
摘要:由于黄土具有多孔易湿陷及透水性强等特性,为人们日常生产生活带来诸多问题,因此,在实际工程中,人们多采用添加固化剂的方式来固化黄土以使其达到生产要求。本文以新型固化剂SH及石灰分别及共同加固黄土后,先进行冻融循环试验,而后进行无侧限抗压强度试验,研究了两种加固材料分别加固时和同时加固时在冻融循环条件下强度变化的特征。通过试验发现,两种加固材料都可使土体的耐冻融循环特性得到不同程度的提高,当两种材料同时加固时,土体的耐冻融循环性优于前两者,这从一方面证实,SH-石灰对黄土的加固效果较好,在实际工程中是一种行之有效的加固方案。
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Study on Anti - freeze - thaw Cycling Characteristics of SH and Lime Improved Loess
Abstract:Because the loess has the characteristics of easy to trap and easy to penetrate and so on, it brings many problems for the daily production and life. Therefore, in the actual engineering, the loess is cured by adding the curing agent to make it meet the production requirements. In this paper, the new type of curing agent SH and lime, respectively, and the common reinforcement of loess, the first freeze-thaw cycle test, and then the unconfined compressive strength test, the two reinforcement materials were reinforced and at the same time in the freeze-thaw cycle conditions The characteristics of the lower intensity change. It is found that the two kinds of reinforcement materials can improve the freeze-thaw cycle characteristics of the soils. When the two materials are simultaneously strengthened, the freeze-thaw cycle of the soil is better than that of the former. It is confirmed that the reinforcement effect of SH-lime on loess is good, and it is an effective reinforcement scheme in practical engineering.
Keywords: loess SH lime freeze-thaw cycle
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