本文關鍵詞： 黃土 抗疏力固化劑 進水能力 滲透性 失水能力　出處：《巖土力學》2016年S1期 　論文類型：期刊論文

【摘要】：抗疏力固化劑在我國黃土加固中運用較少,探究抗疏力固化劑是否有利于維持黃土內部干燥狀態(tài)很有必要。采用抗疏力固化劑對重塑Q_3黃土改性,室內開展水滴入滲試驗、柔性壁滲透試驗、收縮試驗及壓力膜儀脫水試驗,分別探討抗疏力固化劑摻量對黃土進水、滲透及失水能力的影響。結果顯示,隨抗疏力固化劑摻量提高,土樣斥水性急劇增大,明顯優(yōu)于粉煤灰、水泥、石灰改性土;滲透系數(shù)基本不變,水的流通性基本不變;干縮失水過程改性土樣含水率及土-水特征曲線毛細作用區(qū)曲線斜率均變化不大,黃土失水能力基本不變。結合電鏡及壓汞試驗結果可知,抗疏力固化劑對黃土中大孔隙、中孔隙體積含量影響較小,從而對黃土中水的流通及失去能力影響較少,證明抗疏力固化劑改性黃土斥水性明顯提高,而失水能力基本不變,有利于維持黃土內部的干燥狀態(tài)。
[Abstract]:The anti-thinning agent is seldom used in loess reinforcement in our country. It is necessary to explore whether the anti-thinning agent is beneficial to maintain the dry state of loess. The anti-thinning agent is used to modify Q3 loess, and the water droplet infiltration test is carried out in the laboratory. The effects of the content of anti-thinning agent on the influent, permeability and water loss of loess were studied in the tests of flexible wall penetration, shrinkage test and pressure film apparatus dehydration. The results showed that the content of anti-thinning agent increased with the increase of the content of anti-thinning agent. The water repellency of soil sample increases rapidly, which is obviously superior to that of fly ash, cement, lime modified soil, the permeability coefficient is basically unchanged, and the water circulation is basically unchanged. The water content of modified soil samples and the slope of capillary action zone of soil-water characteristic curve have little change, but the water loss ability of loess is basically unchanged. Combined with the results of electron microscope and mercury injection test, it can be seen that the anti-thinning agent has great porosity in loess. The medium pore volume content has little effect on the circulation and loss of water in loess. It is proved that the water-repellent property of loess modified by anti-thinning agent is obviously improved, but the water loss ability is basically unchanged, which is beneficial to maintain the dry state of loess.
【作者單位】： 蘭州大學西部災害與環(huán)境力學教育部重點實驗室;蘭州大學土木工程與力學學院;
【分類號】：TU444

【參考文獻】

相關期刊論文 前9條

1 張虎元;林澄斌;生雨萌;;抗疏力固化劑改性黃土工程性質試驗研究[J];巖石力學與工程學報;2015年S1期

2 楊松;龔愛民;吳s，

本文編號：1556229