| 岩质边坡表层黏性客土抗裂特性试验研究 |
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| 引用本文： | 宋京雷,何伟,郝社锋,蒋波,刘瑾,卜凡,宋泽卓.岩质边坡表层黏性客土抗裂特性试验研究[J].水文地质工程地质,2021,48(3):144-149. |
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| 作者姓名： | 宋京雷 何伟 郝社锋 蒋波 刘瑾 卜凡 宋泽卓 |
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| 作者单位： | 1.江苏省地质调查研究院，江苏 南京 210018 |
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| 基金项目： | 江苏省自然资源科技项目（KJXM2019028）；自然资源部国土（耕地）生态监测与修复工程技术创新中心开放课题（2020） |
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| 摘 要： | 客土喷播是当前对于裸露岩质边坡生态修复的一种常用技术。然而，边坡表层黏性客土在干旱的气候条件下，内部水分大量流失将容易产生干缩、开裂现象，进而影响坡面的整体稳定性，以及表面植被的生长。本文针对边坡表层黏性客土开裂问题，通过改变土体厚度，以及制备不同聚氨酯（PU）浓度的高分子复合黏性客土，开展一系列室内蒸发试验，以分析土体表面裂隙发育特征，并结合数字图像处理技术（PCAS），对裂隙网络的几何形态进行定量分析，进一步探究土体厚度和高分子添加剂浓度对其裂隙发育的影响。
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| 关 键 词： | 岩质边坡 黏性客土 土体厚度 高分子材料 裂隙发育特征 |
| 收稿时间： | 2020-08-11 |
An experimental study of the anti-cracking characteristics of foreign-clay based on rock slope |
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| Affiliation: | 1.Geological Survey of Jiangsu Province, Nanjing, Jiangsu 210018, China2.Technology Innovation Center for Ecological Monitoring & Restoration Project on Land (Arable), Ministry of Natural Resources, Nanjing, Jiangsu 210018, China3.School of Earth Sciences and Engineering, Hohai University, Nanjing, Jiangsu 211100, China |
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| Abstract: | Foreign-clay spraying is currently a common technology for ecological restoration of exposed rock slopes. However, under arid climate conditions, the large amount of internal water loss of the foreign-clay on the slope surface will easily cause shrinkage and cracking, which will affect the overall stability of the slope and the growth of surface vegetation. In this paper, aiming at the problem of cracking of the foreign-clay on the slope surface, by changing the thickness of the soil, polymer composite foreign-clay with different polyurethane (PU) concentrations is prepared to analyze the development characteristics of cracks through a series of indoor drying tests. In addition, particles (Pores) and cracks analysis system (PCAS) are used to conduct a quantitative analysis of the geometry of crack network, so as to further explore the influence of soil thickness and polymer additive concentration on fracture development. |
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