| 基质吸力对非饱和重塑黄土崩解性影响试验研究 |
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| 引用本文： | 王菁莪,项伟,毕仁能.基质吸力对非饱和重塑黄土崩解性影响试验研究[J].岩土力学,2011,32(11):3258-3262. |
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| 作者姓名： | 王菁莪 项伟 毕仁能 |
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| 作者单位： | 1. 中国地质大学(武汉)工程学院,武汉 430074;中国地质大学 教育部长江三峡库区地质灾害研究中心,武汉 430074
2. 中国地质大学(武汉)工程学院,武汉,430074 |
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| 摘 要： | 取陕北地区马兰黄土制成一系列干密度相同而含水率不同的重塑对比试验土样。用体积压力板仪测得土样的土-水特征曲线。利用自制的崩解试验仪器对不同初始基质吸力土样进行试验,得出平均崩解速度与初始基质吸力的关系曲线。试验结果表明,干燥黄土比湿润黄土更易发生崩解破坏,非饱和重塑黄土的初始基质吸力与平均崩解速度存在对数关系。基质吸力对非饱和重塑黄土崩解性的影响主要表现为两个方面:①基质吸力越大,水在土中的渗透速度越快,水快速入渗可提高土体内部孔隙水压力,同时溶解黄土颗粒间胶结物,使土体软化;②水快速占据土体内部孔隙,使土体内部气体以气泡形式挤出形成对外的压力。
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| 关 键 词： | 非饱和重塑黄土 崩解 基质吸力 土-水特征曲线 |
| 收稿时间： | 2010-03-20 |
Experimental study of influence of matric suction on disintegration of unsaturated remolded loess |
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| WANG Jing-e,XIANG Wei,BI Ren-neng.Experimental study of influence of matric suction on disintegration of unsaturated remolded loess[J].Rock and Soil Mechanics,2011,32(11):3258-3262. |
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| Authors: | WANG Jing-e XIANG Wei BI Ren-neng |
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| Institution: | 1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China; 2. Three Gorges Research Center for Geo-Hazard, Ministry of Education, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | A series of samples with same dry density and different moisture contents for comparative tests were made from Malan loess collected from north of Shaanxi province in China.Soil-water characteristic curve of the sample was tested by volumetric pressure plate instrument.By disintegration tests of samples with different initial matric suctions with self-made disintegration device;relation curve of average disintegrating velocity and initial matric suction was gotten.The results of tests indicate that the wate... |
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| Keywords: | unsaturated remolded loess disintegration matric suction soil-water characteristic curve |
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