發(fā)布時(shí)間：2018-04-24 20:44

  本文選題：重塑黃土 + 濕陷性�。� 參考：《蘭州理工大學(xué)學(xué)報(bào)》2015年06期

【摘要】：為探索黃土處理后取樣測(cè)定濕陷性的合理時(shí)間節(jié)點(diǎn),以重塑黃土的含水量、干密度和齡期為因素,設(shè)計(jì)混合均勻試驗(yàn)方案,研究多因素耦合條件下齡期對(duì)重塑黃土濕陷性的作用規(guī)律.應(yīng)用最小二乘擬合,建立濕陷系數(shù)與含水量、干密度、齡期的非線性回歸數(shù)學(xué)模型.結(jié)果表明,影響濕陷系數(shù)的主要因素是干密度,其次是含水量和齡期;含水量和干密度的作用為負(fù)效應(yīng),齡期的作用為正效應(yīng).齡期干密度的交互作用為正效應(yīng),齡期含水量、含水量干密度的交互作用為負(fù)效應(yīng);交互作用的因素主次順序?yàn)辇g期干密度、齡期含水量、含水量干密度.取樣測(cè)定濕陷性的合理時(shí)間節(jié)點(diǎn)與擾動(dòng)黃土土樣的干密度和含水量有關(guān).試驗(yàn)所選水平范圍內(nèi),齡期大于21d后,濕陷系數(shù)均基本趨于穩(wěn)定,可取21d作為擾動(dòng)黃土測(cè)定濕陷性的合理時(shí)間節(jié)點(diǎn).
[Abstract]:In order to explore the reasonable time node for sampling and measuring collapsibility after loess treatment, a mixed uniform test scheme was designed based on the factors of water content, dry density and age of remolded loess. To study the effect of age on collapsibility of remolded loess under multi-factor coupling condition. By using least square fitting, a nonlinear regression mathematical model of collapsibility coefficient and moisture content, dry density and age was established. The results showed that the main factors affecting the coefficient of collapsibility were dry density, followed by water content and age, the effect of water content and dry density was negative and the effect of age was positive. The interaction of dry density of age is positive effect, the interaction of water content and dry density of water content is negative effect, and the order of interaction factors is dry density of age, water content of age and dry density of water content. The reasonable time node for sampling and measuring collapsibility is related to the dry density and water content of disturbed loess soil samples. In the range of the selected level, when the age is more than 21 days, the collapsibility coefficient tends to be stable basically, and 21 days can be used as the reasonable time node to determine the collapsibility of disturbed loess.
【作者單位】： 寧夏大學(xué)土木與水利工程學(xué)院;寧夏建筑科學(xué)研究院有限公司;商丘市審計(jì)局;
【基金】：教育部“長(zhǎng)江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃”創(chuàng)新團(tuán)隊(duì)項(xiàng)目(IRT1067)
【分類號(hào)】：TU444

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