| 四种因素对纤维加筋盐渍土抗压性能的影响 |
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| 引用本文： | 姜宇波,柴寿喜,魏 丽,郑娇娇.四种因素对纤维加筋盐渍土抗压性能的影响[J].岩土力学,2016,37(Z1):233-239. |
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| 作者姓名： | 姜宇波 柴寿喜 魏 丽 郑娇娇 |
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| 作者单位： | 天津城建大学 地质与测绘学院，天津 300384 |
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| 基金项目： | 国家自然科学基金（No.41272335）；天津市自然科学基金（No.12JCYBJC14500）。 |
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| 摘 要： | 滨海盐渍土的盐胀、溶陷和吸湿软化等不良特性导致其抗压性能的降低。选择含水率13%、15%、17%，干密度1.77、1.80、1.84 g/cm3，加筋长度为6、12、19、25、31 mm，质量加筋率为0.1%、0.15%、0.2%、0.25%、0.3%四种影响因素，开展聚丙烯纤维加筋土的无侧限抗压试验。试验表明，抗压强度随含水率的增加而减小，随干密度的增大而增大，随加筋长度和质量加筋率的增加先增大后减小，在加筋长度为19 mm和质量加筋率为0.2%时强度达到峰值；应力-应变曲线均呈应变软化型，含水率对应力-应变的影响程度最大。多元非线性逐步回归分析得出4种因素对抗压性能的影响程度大小依次为含水率、干密度、质量加筋率和加筋长度，纤维加筋可明显提高滨海盐渍土的抗压强度及抗变形性能。
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| 关 键 词： | 纤维加筋土 抗压强度 应力-应变 盐渍土 |
| 收稿时间： | 2015-05-12 |
Effect of four factors on compressive property of fiber-saline soil |
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| JIANG Yu-bo,CHAI Shou-xi,WEI Li,ZHENG Jiao-jiao.Effect of four factors on compressive property of fiber-saline soil[J].Rock and Soil Mechanics,2016,37(Z1):233-239. |
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| Authors: | JIANG Yu-bo CHAI Shou-xi WEI Li ZHENG Jiao-jiao |
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| Institution: | School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China |
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| Abstract: | The engineering problems of saline soil in inshore, including expansion, dissolution and water absorption, which result in the decrease of the compressive property are studied, Unconfined compressive test on fiber-saline soil is carried out in the conditions of three water contents (13%, 15% and 17%), three dry densities (1.77, 1.80 and 1.84 g/cm3), five fiber lengths (6, 12, 19, 25 and 31 mm) and five fiber contents (0.1%, 0.15%, 0.2%, 0.25% and 0.3%). The results show that the compressive strength fiber-saline soil decreases with increasing water content and increases with increasing dry density, but firstly it increases, and then decreases with increasing fiber length and fiber content at the limited point of fiber length 19 mm and fiber content 0.2%. All stress-strain curves are strain softening; the water content is a major influencing factor. By means of the nonlinear multivariate stepwise regression method, the sequence of adverse effect on the compressive property is water content, dry density, fiber content and fiber length respectively. It has been proved that reinforcing fiber can contribute to enhance the compressive property of saline soil significantly. |
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| Keywords: | fiber-saline soil compressive strength stress-strain saline soil |
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