| 南水北调渠坡膨胀土胀缩特性及变形模型研究 |
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| 引用本文： | 刘祖强,罗红明,郑敏,施云江.南水北调渠坡膨胀土胀缩特性及变形模型研究[J].岩土力学,2019,40(Z1):409-414. |
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| 作者姓名： | 刘祖强 罗红明 郑敏 施云江 |
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| 作者单位： | 1. 长江空间信息技术工程有限公司(武汉)，湖北 武汉 430010；2. 湖北省水利信息感知与大数据工程技术研究中心，湖北 武汉 430010；
3. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071 |
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| 基金项目： | 国家科技支撑计划课题（No.2011BAB10B02）；国家自然科学基金项目（No.41402318，No.51579236） |
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| 摘 要： | 南水北调工程膨胀土渠坡变形受大气降雨、蒸发等干湿循环作用较为显著，揭示渠顶膨胀土在干湿循环作用下的胀缩变形和垂直位移变形特征，可为渠坡的稳定性评价与处治方案提供依据。利用膨胀土室内胀缩特性试验结果，结合垂直位移量、含水率、降雨量、蒸发量和气温监测等现场观测数据，分析渠顶位移量和影响因子间关联度，建立了干湿循环作用下渠顶膨胀土的竖向变形模型。研究结果表明，以含水率、降雨量、蒸发量等构成的胀缩因子与渠顶垂直位移呈负相关关系，胀缩因子引起垂直位移分量较小；温度因子与渠顶垂直位移呈正相关关系，对渠顶垂直变形有较大影响，是影响渠顶变形的主要因素；渠坡开挖（时效因子）在施工初期对渠顶垂直变形有一定的影响，开挖完成后对渠顶垂直变形影响甚微。
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| 关 键 词： | 南水北调工程 膨胀土渠坡 胀缩特性 关联分析 变形模型 |
| 收稿时间： | 2018-11-13 |
Study on expansion-shrinkage characteristics and deformation model for expansive soils in canal slope of South-to-North Water Diversion Project |
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| LIU Zu-qiang,LUO Hong-ming,ZHENG Min,SHI Yun-jiang.Study on expansion-shrinkage characteristics and deformation model for expansive soils in canal slope of South-to-North Water Diversion Project[J].Rock and Soil Mechanics,2019,40(Z1):409-414. |
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| Authors: | LIU Zu-qiang LUO Hong-ming ZHENG Min SHI Yun-jiang |
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| Institution: | 1. Changjiang Spatial Information Technology Engineering Co., Ltd. (Wuhan), Wuhan, Hubei 430010, China; 2.Hubei Province Engineering Technology Research Center for Water Resources Information Perception and Big Data, Wuhan, Hubei 430010, China; 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan, Hubei 430071, China |
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| Abstract: | The deformation of expansive soil slope of the South-to-North Water Transfer Project is significantly affected by the dry-wet cycles such as rainfall and evaporation. The characteristics of expansion-shrinkage deformation and vertical displacement deformation of the expansive soil at canal top under dry-wet cycling are revealed, which provides a basis for the stability evaluation and treatment plan of the slope. Based on the experimental results of the expansion-shrinkage characteristics of expansive soil, combining the field observation data such as vertical displacement, water content, rainfall, evaporation and temperature monitoring, the correlation between the displacement of the canal top and the influence factor is analyzed, and a model for vertical deformation of the expansive soil at canal top under the action of dry-wet cycling is established. The results show that the expansion-shrinkage factor composed of water content, rainfall and evaporation are negatively correlated with the vertical displacement of the canal top. The vertical displacement component is smaller due to the expansion-shrinkage factor. The temperature factor is positively correlated with the vertical displacement of the canal top, and has a great influence on the vertical deformation of the canal top, which is the main factor affecting the deformation of the canal top. The slope excavation(time-effect factor) has a certain influence on the vertical deformation of the canal top at the initial stage of construction, but little influence on the vertical deformation of canal top after excavation. |
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| Keywords: | South-to-North Water Diversion Project expansive soil canal slope expansion and contraction characteristics correlation analysis deformation model |
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