复合土工膜与纳米混凝土衬砌渠道冻胀模拟  

Asphalt Concrete and Polymer Cement Waterproof Material Simulation Analysis of Channels Frost Heave

作　　者：陈立杰[1] 蔡雪雁[1] 王正中[2,3] 牛永红[3] 华为[1] 

机构地区：[1]中国农业科学院农产品加工研究所后勤基建中心,北京100094 [2]西北农林科技大学水工程安全与病害防治研究中心,陕西杨凌712100 [3]中国科学院冻土工程国家重点实验室,甘肃兰州730000

出　　处：《中国农村水利水电》2010年第8期106-109,共4页China Rural Water and Hydropower

基　　金：国家"863"计划基金资助项目(2002AA62Z3191);国家冻土工程重点试验室基金资助项目(9901)

摘　　要：兼顾材料和结构的防渗抗冻胀技术受到广泛共识,复合土工膜具有防渗性能好,适应变形能力强等优点,混凝土加入纳米微粉可大幅提高其抗渗、抗冻性能且经济合理。为了研究这两种防渗技术的有效性,以甘肃靖会总干的梯形渠道为例,采用有限元分析软件ADINA,对其进行温度场、变形场及应力场仿真分析,研究了衬砌板的冻胀变形及其法向冻胀力和切向冻胀力分布规律,并分析衬砌板的应力及破坏规律;通过与普通混凝土衬砌对比分析,指出采用纳米微粉高性能混凝土、复合土工膜柔性防渗抗冻胀技术措施不仅能使衬砌板的冻胀量及冻胀力更加均匀,而且通过柔性释放变形,可使其法向及切向冻胀力减小30%～48%,可有效控制衬砌渠道冻胀破坏,为进一步优化结构与材料组合提供借鉴。Materials and structures for anti-seepage and anti-heave is more and more important nowadays.The compound geomembrane composite geo-membrane owns the advantages of high anti-seepage and ability to adapt to deformation.With the nano-powders as admixture,the concrete＇s performance,such as anti-permeability,anti-freeze has improved a lot.This paper uses finite element analysis software ADINA,carries out a simulation analysis of the temperature field,the distortion field and the stress field,studies liner plate＇s heave distortion and the normal frost heaving pressure and the tangential frost heaving pressure distribution rule,and analyzes liner plate＇s stress and the destruction rule.Through the plain concrete lining work contrastive analysis,it is pointed out that using the asphalt concrete and flexible enhancement coating material and so on can not only cause liner plate＇s heave quantity and the frost heaving pressure to be evener,it also deforms through release,may cause its normal and the tangential frost heaving pressure to reduce 30%～48%,actively control the destruction of lining work channel heave,which can provide some suggestions for the optimization of structures and materials.

关 键 词：渠道 冻胀 纳米混凝土 复合土工膜 

分 类 号：S27[农业科学—农业水土工程] TV3[农业科学—农业工程]