| 摘要: |
| 季节性冻土地区的渠道衬砌易遭受冻胀破坏。【目的】探明渠道衬砌的冻胀破坏机理。【方法】采用力学理论基本计算方法，考虑渠道衬砌自重、法向冻胀力、法向冻结力和切向冻结力等4种作用力，建立了U形渠道直坡板的挠度方程，依据渠道衬砌坡板不同位置的实测冻胀量，联立方程组，求解出未知冻胀力。【结果】利用该方法可以简单准确计算渠道直坡板的最危险截面位置和未知冻胀力；利用该模型的解析解对渠道实测冻胀量进行计算比较分析，该模型计算出的冻胀力与实测值吻合度高。【结论】该方法易于准确求解渠道衬结构的砌冻胀内力。 |
| 关键词: 渠道衬砌板； 挠度方程； 冻胀量； 冻胀内力； 最危险截面 |
| DOI：10.13522/j.cnki.ggps.2016.0283 |
| 分类号: |
| 基金项目: |
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| Calculation Method for Frost Heaving Force of Canal Based on Deflection Equations |
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LI Hongbo, TIAN Juncang, XIA Tian, WANG Bin
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College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China; .Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation, Yinchuan 750021, China; Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions. Yinchuan 750021, China
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| Abstract: |
| The canal lining in seasonal frost regions was easily to be damaged due to frost deformation. 【Objective】 Investigate mechanism of frost heaving damage of canal lining. 【Method】 Method of theoretical basic computational mechanics was adopted，and the deflection equation of straight slope plate of U-shaped canal was established by considering weight force of canal lining, normal frost heaving force, normal freezing force and tangential freezing force, we established u-shaped channel straight slope plate deflection equation. In addition, the unknown frost heaving force and most dangerous sections of straight slope plate of canal was given by solving simultaneous equations, according to actual value of frost heave amount in different parts of canal lining plate. 【Result】①The method was precise and simple to calculate the most dangerous section location and unknown frost heaving force of channel slope plate;②Comparison between analytical solution value of the model and actual value of frost heave amount showed that the analytical solution was highly consistent with the actual value. 【Conclusion】Thus the model can be applied to solve the frost heaving force problems of canal lining and provide new ideas for frost computing theory of canal. |
| Key words: canal lining plate; deflection equation; frost heave amount; frost heaving force; most dangerous sections |
