| 摘要: |
| 高聚物防渗墙是针对土质堤坝防渗加固的新型防渗技术，具有施工快捷方便、防渗性能优良、绿色环保等诸多优势，在实际工程中应用越来越广泛。为研究高聚物防渗墙的应变特征，以堤坝模型试验为基础，建立堤坝高聚物防渗墙三维有限元模型，分析了交通荷载（大车正载、大车偏载、动态冲击荷载）作用下防渗墙的横向应变以及竖向应变，并且通过与现场模型试验结果对比，验证了数值模型的合理性，得出高聚物防渗墙的应变随深度呈现先快速增大至峰值后减小至稳定状态的三段式变化规律。同时得到了在相同位置作用不同冲击荷载和防渗墙在不同位置作用相同冲击荷载时的应变变化曲线。结果还表明高聚物防渗墙表现出一定的柔性特征，有利于防渗墙防渗功能的发挥。研究结果可为高聚物防渗墙设计及施工提供参考。 |
| 关键词: 高聚物防渗墙 交通荷载 数值模拟 现场模型试验 应变特征 |
| DOI： |
| 分类号:TV543 |
| 基金项目:国家重点研发计划项目(2017YFC5002600) |
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| Strain Characteristics of Polymer Anti-seepage Wall under Traffic Load |
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GUO Chengchao1, YANG Jianchao2, SHI Mingsheng1, CAI Binghua3, LI Zhongchao3
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1.School of Water Conservancy Science and Engineering, Zhengzhou University;2.Wuzhi Yutai Real Estate Development Co., Ltd, Wuzhi;3.Wuhan Municipal Construction Group Co.Ltd, Wuhan,Hubei
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| Abstract: |
| The polymer anti-seepage wall is a new anti-seepage technology specially for anti-seepage and reinforcement of earth dams. It has many advantages such as quick and convenient construction, excellent anti-seepage performance, green environmental protection. In order to analyze the strain characteristics of polymer anti-seepage wall, a three-dimensional finite element model of the dam with high-polymer anti-seepage wall is established based on the dam model test result. Then the lateral strain and vertical strain of the anti-seepage wall under various traffic load (large load, heavy load, dynamic impact load) are obtained. Meanwhile, the rationality of the numerical simulation model is verified by the result comparison with field full-scale test. The curves between strain of the polymer anti-seepage wall and its depth under different loadings applied at the same position and same loadings applied at different positions are acquired respectively. It can be shown that the strain value of the polymer anti-seepage wall experienced three different stage from top to bottom: firstly increasing rapidly to the peak, then decreasing quickly, lastly keeping in steady state. In addition, the results suggest that the polymer anti-seepage wall possesses flexible characteristics, which may be beneficial to the anti-seepage ability of the anti-seepage wall. As a conclusion, the research and analysis results can provide a basis for the design and construction of polymer anti-seepage wall. |
| Key words: Polymer anti-seepage wall traffic load numerical simulation field model test strain characteristics |
