【摘要】：墊層料凍融變形過(guò)大會(huì)影響寒區(qū)面板壩正常運(yùn)行,有必要對(duì)墊層料凍脹融沉特性開(kāi)展深入研究。受儀器設(shè)置限制,室內(nèi)試驗(yàn)時(shí)只能采用縮尺后的墊層料試樣,這可能會(huì)對(duì)試驗(yàn)結(jié)果有較大影響。為了揭示凍融試驗(yàn)中縮尺效應(yīng)的影響規(guī)律,對(duì)不同限制粒徑的試樣進(jìn)行了凍融試驗(yàn)。結(jié)果表明,相同相對(duì)密實(shí)度和含水率條件下,隨著限制粒徑的增大,試樣凍脹變形量呈雙曲線趨勢(shì)減小;而凍融后總變形率先增大后減小。對(duì)比分析顯示,試驗(yàn)結(jié)果與孔隙模型預(yù)測(cè)值吻合較好。
[Abstract]:The freezing and thawing deformation of cushion material affects the normal operation of concrete face dam in cold area, so it is necessary to study the frost heaving and thawing characteristics of cushion material. Due to the limitation of instrument setting, only the sample of pad layer after scale can be used in laboratory test, which may have a great influence on the test results. In order to reveal the influence rule of scale effect in freeze-thaw test, freeze-thaw tests were carried out on samples with different size limits. The results show that under the same relative compactness and moisture content, the frost heave deformation decreases with the increase of limited particle size, while the total deformation increases first and then decreases after freezing and thawing. The comparative analysis shows that the experimental results are in good agreement with the prediction values of the pore model.
【作者單位】： 河海大學(xué)巖土力學(xué)與堤壩工程教育部重點(diǎn)實(shí)驗(yàn)室 江蘇省巖土工程技術(shù)工程研究中心 河海大學(xué);
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金(B15020060) 國(guó)家自然科學(xué)基金(51378008)資助
【分類(lèi)號(hào)】：TV41

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