本文關(guān)鍵詞：鐵尾礦粉改良水泥土的強(qiáng)度與動(dòng)力特性試驗(yàn)研究　出處：《硅酸鹽通報(bào)》2017年11期 　論文類型：期刊論文

  更多相關(guān)文章： 水泥土 尾礦粉 動(dòng)剪模量 阻尼比

【摘要】：為提高水泥改良土強(qiáng)度,驗(yàn)證尾礦粉能夠起到對(duì)水泥土的增強(qiáng)效果,對(duì)已用水泥改良過(guò)的路基土,在尾礦粉摻入量不同的條件下,經(jīng)改良后水泥土的強(qiáng)度特性,以及對(duì)被最佳摻量的尾礦粉改良后的水泥土,在圍壓和頻率不同的條件下進(jìn)行動(dòng)力特性的試驗(yàn)研究,制備了不同尾礦粉摻量(0%、2%、4%、6%、8%、10%)的試驗(yàn)土樣進(jìn)行無(wú)側(cè)限抗壓強(qiáng)度試驗(yàn)和動(dòng)三軸試驗(yàn);試驗(yàn)結(jié)果表明:隨著尾礦粉摻入量的增加,無(wú)側(cè)限抗壓強(qiáng)度先增大后減小,土的應(yīng)力應(yīng)變曲線先急劇增加達(dá)到峰值后逐漸趨于平緩。當(dāng)尾礦粉摻量達(dá)到最佳時(shí),分析不同圍壓和不同頻率的條件下G/G_(max)~γ、λ~γ變化規(guī)律。對(duì)于同一動(dòng)剪應(yīng)變幅,動(dòng)剪模量比隨圍壓的增加而增大。阻尼比隨動(dòng)剪應(yīng)變幅的增大而增大,隨圍壓的增大而減小。G/G_(max)~γ、λ~γ關(guān)系受頻率影響不太敏感,都集中于一狹小范圍。該試驗(yàn)?zāi)軌蛱岣咚嗤翉?qiáng)度的尾礦粉最佳摻量為6%。
[Abstract]:In order to improve the strength of cement soil, verification of tailings powder can play to enhance the effect of the cement soil, the subgrade soil with cement modified, tailings powder incorporation in different conditions, the strength characteristics of modified cement soil, and the soil cement tailings powder modified optimum dosage after experimental study on the dynamic characteristics, the confining pressure and frequency under different conditions, different tail slag content were prepared (0%, 2%, 4%, 6%, 8%, 10%) of the test samples of unconfined compressive strength test and three triaxial test; test results show that with the increase of tailings powder the amount of non compressive strength increases first and then decreases, the stress-strain curve of soil increased sharply after the peak gradually leveled off. When the tail slag content to achieve the best, analysis of different confining pressure and different frequency under the condition of G/G_ (max) ~ ~ gamma gamma, lambda for law changes. The same dynamic shear strain, The dynamic shear modulus ratio increases with the increase of confining pressure. The damping ratio with dynamic shear strain increases with the increase of confining pressure decreases.G/G_ (max) ~ ~ gamma gamma, lambda relationship affected by frequency not too sensitive, are concentrated in a narrow range. The test can improve the best mixing tailings powder the amount of cement soil strength is 6%.

【作者單位】： 遼寧工程技術(shù)大學(xué)土木工程學(xué)院;
【基金】：國(guó)家安監(jiān)總局項(xiàng)目(05 05 079) 遼寧省教育廳項(xiàng)目(1.2011048)
【分類號(hào)】：TU41
【正文快照】： 1引言目前,隨著我國(guó)高速公路和鐵路的快速發(fā)展,其自身的安全性和可靠性備受關(guān)注。想要使列車高速安全平穩(wěn)地運(yùn)行,必須要有穩(wěn)定與平順線路。鐵軌下基礎(chǔ)的道床和路基的材料是散體材料,而且散體材料極易出現(xiàn)變形,并且抵抗振動(dòng)的能力比較弱,所以道床和基床就成為了鐵路線路結(jié)構(gòu)中

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1 徐媛媛;水泥土半剛性擠密樁復(fù)合地基承載能力試驗(yàn)研究[D];西安科技大學(xué);2017年

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本文編號(hào)：1413035