不同U型结构混凝土渠道冻胀数值模拟分析  

Numerical Simulation Analysis on Frost Heaving Damage of U-shaped Canal Lining Based on Different Parameter Combinations

作　　者：高靖[1] 田军仓[1,2,3] 王斌[1,2,3] 

机构地区：[1]宁夏大学土木与水利工程学院,银川750021 [2]宁夏节水灌溉与水资源调控工程技术研究中心,银川750021 [3]旱区现代农业水资源高效利用教育部工程研究中心,银川750021

出　　处：《灌溉排水学报》2015年第4期38-42,共5页Journal of Irrigation and Drainage

基　　金："十二五"农村领域国家科技计划课题(2012BAD08B01-5);教育部"长江学者和创新团队发展计划"创新团队项目(IRT1067);宁夏自然科学基金项目(NZ12148)

摘　　要：为了探明U型混凝土渠道倾角和厚度对其抗冻胀效果的影响,以衬砌板为研究对象,对不同倾角、不同厚度的衬砌进行了数值模拟。结果表明,随倾角或厚度的增大,衬砌的冻胀不均匀性减小,冻胀变位和高峰应力也相应减小。厚度为10、8、6、4cm的同一倾角U型衬砌板,衬砌圆弧段冻胀变位幅度较小,几乎不随厚度的变化而变化;各厚度的衬砌,0°~8°倾角范围内,衬砌的冻胀不均匀性的变化梯度较大,倾角的增大对其冻胀不均匀性影响显著;22°~34°倾角范围内,倾角的增大对其抵抗冻胀效果影响不明显;8°~22°倾角范围内,倾角的增大对其冻胀不均匀性影响适中,以15°~22°为宜。In order to explore the response of obliquity and thickness of U-shaped concrete lining canal to the frost heave, numerical simulation was carried out under different obliquities and thicknesses with chan- nel lining board as research object. The results indicated that with the increase of obliquity and thickness, uneven frost heave reduced, and frost heave displacement and the peak stress also correspondingly re- duced. At the same obliquity of the channel with thicknesses of 10, 8, 6, 4 cm, the lining canal of circular arc section of frost heave displacement amplitudes were small and hardly changed along with the change of thickness. When the obliquity was not greater than 8 degree, the increase of obliquity had great effect of uneven frost heave. When the obliquity changed from 22 degree to 34 degree, the increase of obliquity had less effect on uneven frost heave, and anti frost effect was not significant. When the obliquity ranged from 8 degree to 22 degree, the increase of obliquity had moderate effect on uneven frost heave, and it was ad- visable to select 15 degree^22 degree.

关 键 词：数值模拟 U型渠道 冻胀破坏 ADINA 

分 类 号：S277[农业科学—农业水土工程]