| 摘要: |
| [目的]科学指导冻土地区大U形混凝土衬砌渠道的设计建设.[方法]针对大U形混凝土衬砌渠道的冻胀机理和冻胀破坏特点,通过适当的假设,建立了大U形混凝土衬砌渠道非对称冻胀破坏的力学模型.[结果]只需选取最大冻结力一个参变量,即可求解渠道衬砌板上的冻胀力,并结合混凝土板抗裂条件,给出内力、胀裂部位、冻胀抗裂板厚及抗冻胀破坏验算等一系列计算方法.[结论]工程实例计算表明,该模型安全合理、简单实用,可为大U形混凝土衬砌渠道防冻胀设计提供科学依据,并为建立其他形式的渠道冻胀破坏力学模型提供参考. |
| 关键词: 大U形渠道 混凝土衬砌 非对称冻胀破坏 力学模型 |
| DOI： |
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| 基金项目:国家冻土工程重点实验室基金项目（9901） |
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| Establishment and application of mechanic models of dissymmetric frost heaving damage of U-shape canal with concrete lining |
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| Abstract: |
| 【Objective】 The study was done for scientific guidance of the canal building in frozen soil areas.【Method】 In light of U-shape canal with concrete lining of frost heaving mechanism and damage characteristics,through the appropriate assumptions,a mechanic model of dissymmetric frost heaving damage of U-shape canal with concrete lining was established.【Result】 A parameter of the greatest frost heaving force was chosen,then the frost heaving forces on lining plates was solved.By combining with concrete plates against cracking conditions,a series of calculation methods were given about the internal forces,cracking site,frost heaving against cracking thickness and anti-frost heaving damage checking.【Conclusion】 The project shows that the model is reasonably safe,simple and practical,providing a scientific basis for the anti-frost heaving designed of U-shape canal with concrete lining and a reference for the establishment of the frost heaving damage mechanic models. |
| Key words: U-shape canal concrete lining dissymmetric frost heaving damage mechanic model |
