本文選題：土力學(xué)　切入點(diǎn)：土石混合體　出處：《巖石力學(xué)與工程學(xué)報(bào)》2017年08期 　論文類型：期刊論文

【摘要】：為研究土石混合體在含超徑顆粒情況下的力學(xué)響應(yīng),利用大型三軸剪切試驗(yàn)儀,分別對(duì)體積含石量為25%,35%的非常規(guī)土石混合體試樣在3種不同圍壓條件下進(jìn)行固結(jié)不排水剪切試驗(yàn)。試驗(yàn)結(jié)果顯示:含超徑顆粒土石混合體在不排水剪切條件下仍然存在體積變化;含石量35%的土石混合體在圍壓較高情況下,體應(yīng)變表現(xiàn)為加載初期剪縮,隨后剪脹,二次剪縮,再次剪脹的特征;含石量25%的土石混合體的應(yīng)力 應(yīng)變曲線較為平滑,但含石量在35%的情況下,應(yīng)力 應(yīng)變曲線則呈現(xiàn)鋸齒狀特征,且伴隨著間接性的應(yīng)力跳躍現(xiàn)象,相應(yīng)的體應(yīng)變、孔隙水壓力也出現(xiàn)跳躍現(xiàn)象,且與試樣的應(yīng)力變化具有很好的對(duì)應(yīng)關(guān)系。
[Abstract]:In order to study the mechanical response of soil-rock mixture with super-diameter particles, a large triaxial shear tester was used. The undrained shear tests of unconventional soil-rock mixture samples with 25% volume rock content were carried out under three different confining pressures. The test results showed that the undrained shear condition of the mixture containing super-diameter particles was still under the condition of undrained shear. However, there is a volume change; In the case of high confining pressure, the bulk strain of the mixture with 35% rock content is characterized by initial shear shrinkage, then dilatation, secondary shear shrinkage, and reshear expansion, and the stress-strain curve of the mixture with 25% rock content is relatively smooth. However, when the rock content is 35%, the stress-strain curve is serrated, and accompanied by the indirect stress jump phenomenon, the corresponding bulk strain and pore water pressure also appear jump phenomenon. And it has a good correspondence with the stress change of the specimen.
【作者單位】： 中國(guó)科學(xué)院地質(zhì)與地球物理研究所中國(guó)科學(xué)院頁(yè)巖氣與地質(zhì)工程重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)資助項(xiàng)目(41330643) 中國(guó)科學(xué)院科技服務(wù)網(wǎng)絡(luò)(STS)計(jì)劃項(xiàng)目(KFJ-EW-STS 094);中國(guó)科學(xué)院戰(zhàn)略性先導(dǎo)科技專項(xiàng)(B類)課題項(xiàng)目(XDB10030100)~~
【分類號(hào)】：TU43

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本文編號(hào)：1648713