發(fā)布時(shí)間：2018-03-21 11:33

  本文選題：沈陽(yáng)中粗砂　切入點(diǎn)：三軸固結(jié)排水剪切試驗(yàn)　出處：《東北大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期 　論文類(lèi)型：期刊論文

【摘要】：針對(duì)沈陽(yáng)地區(qū)中粗砂在不同圍壓下的三軸固結(jié)排水剪切試驗(yàn),發(fā)現(xiàn)中粗砂的相對(duì)密實(shí)度對(duì)其強(qiáng)度和變形特性有重要影響.以相對(duì)密實(shí)度為自變量,提出了統(tǒng)一擾動(dòng)度函數(shù).基于試驗(yàn)數(shù)據(jù),建立了統(tǒng)一擾動(dòng)度與初始模量和峰值強(qiáng)度的函數(shù)關(guān)系,提出考慮擾動(dòng)的D-C模型.將其預(yù)測(cè)結(jié)果與D-C模型預(yù)測(cè)結(jié)果及試驗(yàn)結(jié)果進(jìn)行對(duì)比:D-C模型的預(yù)測(cè)值在D_D接近0時(shí)與試驗(yàn)結(jié)果比較一致;土體受到正擾動(dòng)時(shí),D-C模型預(yù)測(cè)的應(yīng)力值較該修正模型偏大;而土體受到負(fù)擾動(dòng)時(shí),其預(yù)測(cè)的應(yīng)力值又相對(duì)偏小,因此考慮擾動(dòng)的D-C模型能更好地模擬沈陽(yáng)地區(qū)中粗砂的強(qiáng)度及變形特性.
[Abstract]:In view of the triaxial consolidation and drainage shear tests of medium coarse sand under different confining pressures in Shenyang area, it is found that the relative compactness of medium coarse sand has an important influence on its strength and deformation characteristics. A unified perturbation degree function is proposed. Based on the experimental data, the functional relationship between the unified disturbance degree and the initial modulus and peak strength is established. The D-C model considering disturbance is put forward, and the predicted results are compared with those of D-C model and test results. The predicted value of D-C model is close to 0:00 when D _ S _ D is close to 0:00. When soil is under positive disturbance, the predicted stress value of D-C model is larger than that of the modified model, and the predicted stress value of soil is relatively small when the soil is subjected to negative disturbance. Therefore, the D-C model with disturbance can better simulate the strength and deformation characteristics of coarse sand in Shenyang area.
【作者單位】： 東北大學(xué)資源與土木工程學(xué)院;中國(guó)建筑東北設(shè)計(jì)研究院有限公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51204029) 中建股份科技研發(fā)項(xiàng)目(CSCEC-2014-Z-35)
【分類(lèi)號(hào)】：TU43

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本文編號(hào)：1643671