本文選題：貝殼砂 + 顆粒破碎�。� 參考：《巖土工程學(xué)報(bào)》2014年06期

【摘要】：對(duì)取自福建莆田湄洲灣海域的貝殼砂進(jìn)行了不同圍壓、不同相對(duì)密度下的三軸排水剪切試驗(yàn),同時(shí)考慮了尺寸效應(yīng)的影響。依據(jù)試樣試驗(yàn)前后粒徑分布資料,在統(tǒng)計(jì)熵概念基礎(chǔ)上提出顆粒破碎粒度熵模型對(duì)其破碎率進(jìn)行了度量,并與Hardin顆粒破碎模型進(jìn)行了比較,結(jié)果表明:貝殼砂顆粒破碎率與圍壓、相對(duì)密度及試樣尺寸均有關(guān)系,在相同試驗(yàn)條件下,貝殼砂顆粒破碎程度隨著試樣尺寸的增加而增大,隨著圍壓的增加而增大;當(dāng)相對(duì)密度較低時(shí),顆粒破碎率呈增大趨勢(shì);相對(duì)密度增加到較高值時(shí),顆粒破碎程度減弱;貝殼砂三軸壓縮前后的級(jí)配曲線(xiàn)均可以通過(guò)粒度熵模型參數(shù)表征,其中相對(duì)基礎(chǔ)熵參數(shù)(NB)較好地反映了顆粒破碎程度大小,破碎率愈高,NB值愈小,NB與Hardin破碎率存在顯著的線(xiàn)性關(guān)系。貝殼砂顆粒破碎粒度熵參數(shù)能較好地描述其顆粒破碎行為,為巖土介質(zhì)材料的顆粒破碎分析提供了一個(gè)新的量化指標(biāo)。
[Abstract]:A triaxial drainage shear test of shell sand from Meizhou Bay, Putian, Fujian Province was carried out under different confining pressures and relative densities, and the effect of size effect was considered. Based on the data of particle size distribution before and after the test, a particle breaking particle size entropy model was proposed based on the concept of statistical entropy, and its breakage rate was measured and compared with the Hardin particle breaking model. The results show that the crushing rate of shell sand particles is related to confining pressure, relative density and sample size. Under the same test conditions, the crushing degree of shell sand particles increases with the increase of sample size and increases with the increase of confining pressure. When the relative density is low, the particle breakage rate tends to increase; when the relative density increases to a higher value, the particle fragmentation degree weakens; the gradation curve of shell sand before and after triaxial compression can be characterized by the parameters of particle size entropy model. The relative basic entropy parameter (NB) well reflects the degree of particle breakage. The higher the breaking rate the smaller the NB value and the linear relationship between NB and Hardin breakage rate. The particle size entropy parameter of shell sand can describe its particle breaking behavior well and provide a new quantitative index for the particle breaking analysis of rock and soil media materials.
【作者單位】： 中國(guó)科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國(guó)家重點(diǎn)試驗(yàn)室;天津市政工程設(shè)計(jì)研究院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51109208)
【分類(lèi)號(hào)】：TU411.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 張勇;;高含量貝殼砂在陸域形成中的應(yīng)用[J];水運(yùn)工程;2010年04期

2 趙，

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