高地下水位冻土区弧形底浅拱梯形渠道冻胀力学分析
高地下水位冻土区弧形底浅拱梯形渠道冻胀力学分析
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XIAO, Min , XIONG Zhihao , Lang, WU , CUI Hao , YANG, Xiaosong and GE Jianrui
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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S277%TV67; [目的]明确高地下水位冻土区弧形底浅拱梯形渠道冻胀破坏机理并提出简捷、实用的抗冻胀设计方法.[方法]考虑此类渠道拱高明显小于断面整体深度的特殊性,基于Winkler假设提出衬砌体法向冻胀力计算方法.论证高地下水位渠道衬砌体微小刚性上抬位移对曲线形弧段切向冻结力的影响机制并提出切向冻结力计算方法.基于此构建高地下水位冻土区弧形底梯形渠道冻胀力学模型.[结果]以某弧形底梯形渠道为原型,对比分析不同渠底中心地下水位d对衬砌板截面内力及所受冻胀力的影响.结果表明,d越小则截面内力及冻胀力分布的横向差异越明显;Z0越大,截面内力及冻胀力分布受地下水补给条件的影响越小,与事实相符.充足的水分补给时间、补给来源以及冻胀力横向的不均匀、不同步是此类渠道易遭受冻胀破坏的主要原因.[结论]...
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高地下水位冻土区弧形底浅拱梯形渠道冻胀力学分析
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TN_cdi_wanfang_journals_ggps202207014
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_ggps202207014
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1672-3317
DOI
10.13522/j.cnki.ggps.2022024
