| 李明超,冯达,张梦溪,邓根华,张俊涛,何殷鹏.碾压混凝土层间水分非饱和传输试验与数值分析[J].水利学报,2022,53(1):86-97,108 |
| 碾压混凝土层间水分非饱和传输试验与数值分析 |
| Experimental and numerical analysis of unsaturated water transfer of RCC layers |
| 投稿时间：2021-08-10 |
| DOI：10.13243/j.cnki.slxb.20210721 |
| 中文关键词: 碾压混凝土 层间结合 非饱和传输 细观模拟 各向异性 |
| 英文关键词: RCC interlayer unsaturated water transfer meso-scale simulation anisotropy |
| 基金项目:国家自然科学基金项目（51879185）；国家大坝安全工程技术研究中心开放基金项目（CX2019B02） |
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| 中文摘要: |
| 混凝土结构遭受环境侵蚀破坏的现象普遍存在于水利工程中，非饱和水分传输是产生环境侵蚀的一个重要因素。碾压混凝土由于自身施工特点容易出现层间、界面等薄弱面，研究非饱和水分传输行为有助于提高混凝土耐久性能。为深入分析碾压混凝土中水分传输的特点和影响机理，采用试验和细观模拟相结合的方式，在分析初始条件、吸水时间等水分传输影响因素外，重点分析了碾压混凝土在水分传输中的各向异性以及层间对水分传输特性的影响。试验与模拟结果表明，碾压混凝土不同方向的水分传输特性差异较大，层间结合及其位置对混凝土水分传输过程影响较大，为提高碾压混凝土防渗抗裂性能提供了科学依据。 |
| 英文摘要: |
| The phenomenon of concrete structure being damaged by environmental erosion is widespread in water conservancy projects, and unsaturated water transport is an important factor causing environmental erosion. Due to the construction characteristics of roller compacted concrete (RCC), it is easy to have weak surfaces such as interlayer and interface. Studying the migration behavior of unsaturated water is helpful for improving the durability of concrete. In order to analyze the characteristics and influencing mechanism of water transport in RCC, the anisotropy of roller compacted concrete in the process of water movement and the influence of interlayer on water movement characteristics were emphatically analyzed by combining experiments and meso-scale simulations, in addition to the initial conditions and water absorption time. The experimental results show that the water transport characteristics of RCC are quite different in different directions, and the interlayer bonding and its position have great influence on the water transport process of RCC, which provides a scientific basis for improving the anti-seepage and anti-cracking performance of RCC. |
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