本文選題：堆石料 + 高聚物　； 參考：《巖土力學(xué)》2017年07期

【摘要】：提高壩頂區(qū)堆石料整體穩(wěn)定性是土石壩抗震加固的有效措施之一。為此,提出一種高聚物膠凝堆石料加固技術(shù),該技術(shù)能顯著提高堆石料強度,并有效地減小動荷載下堆石料的永久變形。為研究高聚物膠凝堆石料動殘余變形特性,開展不同圍壓、不同固結(jié)比、不同動應(yīng)力比和不同高聚物含量的系列動三軸試驗。結(jié)果表明:高聚物膠凝堆石料的動殘余變形隨動應(yīng)力比和圍壓的增大而增大;在圍壓為300 kPa、固結(jié)比為1.5、動應(yīng)力比為0.4條件下,高聚物含量為2%的膠凝堆石料產(chǎn)生的殘余應(yīng)變要比相同條件下堆石料的殘余應(yīng)變低74%,因此,高聚物顯著減小了堆石料的殘余變形。給出了沈珠江殘余變形模型計算參數(shù),并進行了對比分析。
[Abstract]:Improving the overall stability of rockfill is one of the effective measures for seismic reinforcement of earth-rock dams. For this reason, a technique of polymer cementitious rockfill reinforcement is proposed, which can significantly improve the strength of rockfill and effectively reduce the permanent deformation of rockfill under dynamic load. A series of dynamic triaxial tests with different confining pressure, different consolidation ratio, different dynamic stress ratio and different polymer content were carried out to study the dynamic residual deformation characteristics of polymer cementitious pile. The results show that the dynamic residual deformation increases with the increase of dynamic stress ratio and confining pressure, and when the confining pressure is 300 KPA, the consolidation ratio is 1.5, the dynamic stress ratio is 0.4. The residual strain of the cemented aggregate with 2% polymer content is 74% lower than that of the aggregate under the same conditions. Therefore, the residual deformation of the aggregate is significantly reduced by the polymer. The calculation parameters of Shen Zhujiang residual deformation model are given and compared.
【作者單位】： 重慶大學(xué)山地城鎮(zhèn)建設(shè)與新技術(shù)教育部重點實驗室;重慶大學(xué)土木工程學(xué)院;魯東大學(xué)土木工程學(xué)院;河海大學(xué)巖土力學(xué)與堤壩工程教育部重點實驗室;
【基金】：國家自然科學(xué)基金面上項目(No.51479059) 長江學(xué)者和創(chuàng)新團隊發(fā)展計劃資助(No.IRT1125) 魯東大學(xué)博士基金(No.2016009)~~
【分類號】：TV41

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相關(guān)期刊論文 前8條

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本文編號：2062920