梯形渠道冻胀数值模拟与边坡系数优化

发布时间：2018-03-21 19:52

本文选题：梯形渠道　切入点：保温防冻胀　出处：《灌溉排水学报》2017年12期 　论文类型：期刊论文

【摘要】：为了得到梯形衬砌渠道适宜的保温措施和渠道断面形式,采用考虑混凝土材料非线性特性及基土与衬砌间接触力学行为的梯形衬砌渠道冻胀破坏热力耦合数值模型的方法,以黑龙江蛤蟆通灌区总干渠为原型渠道,分析了3种不同保温措施对渠道冻胀量的影响,与不设置保温措施的对比段进行比较,并应用该模型分析了不同边坡系数对梯形渠道冻胀适应性能的影响。结果表明,综合考虑工程安全性与经济性,黑龙江省蛤蟆通灌区渠道最优保温板厚度为渠坡10 cm,渠底12 cm,与试验结果相一致;当梯形渠道保温板厚度取最优值时,梯形渠道最优边坡系数为2,此时渠道衬砌适应冻胀性能较好,工程造价也相对较低;研究结果可为黑龙江及其他北方地区梯形渠道提供参考。
[Abstract]:In order to obtain suitable insulation measures and channel section form for trapezoidal lining channel, a coupled numerical model for frost heaving failure of trapezoidal lining canal is adopted, which takes into account the nonlinear characteristics of concrete material and the contact mechanical behavior between base soil and lining. Taking the main canal of Toyutong Irrigation District in Heilongjiang as the prototype channel, the effects of three kinds of heat preservation measures on the frost heaving volume of the canal were analyzed and compared with the comparison section without heat preservation measures. The model is applied to analyze the influence of different slope coefficients on the frost heaving adaptability of trapezoidal channel. The results show that the safety and economy of the project are considered comprehensively. The optimal thickness of canal insulation board is 10 cm for slope and 12 cm for bottom of canal, which is consistent with the test results, when the thickness of trapezoidal channel insulation board is optimal, The optimum slope coefficient of trapezoidal channel is 2. At this time the channel lining has better adaptability to frost heaving and the engineering cost is relatively low. The results of the study can provide a reference for the trapezoidal channel in Heilongjiang and other northern regions.
【作者单位】：西北农林科技大学;西安理工大学高科学院;
【基金】：“十三五”国家重点研发计划课题(2016YFC0400203) “十二五”国家科技支撑计划课题(2012BAD08B01)
【分类号】：S277

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