Establishment Of Mechanics Models And Numerical Stimulation Of Irrigation And Draining Canal With Concrete Lining

China is a serious shortage of water resources, water resources per capita amount ranked No. 109 in the world,it is only the world average level 1/4. The channel anti-seepage is our country uses the most widespread saving water mechanical control measure at present, it may reduce the agriculture irrigation water enormously the waste, the saving water potential is huge.But there are more than 3/5 of our territories are belong to forest area, frost heaving damage is the main destroying forms of the channel in the region. Because the high subsoil water level area fills a row of channel its special hydrogeological conditions to create to its understanding insufficiency. Since long, the project practice protects to the high subsoil water level area irrigation canal's lining lacks simple and direct effective, and the economical suitable method, many projects still used traditional the channel anti-seepage lining work, the massive has constructed after the short-term use, the channel side slope jitter, collapses the destruction to be serious slippery, so,they have restricted the project benefit display seriously. Therefore, how to prevent and control the high subsoil water level area concrete lining channel's heave to destroy has become one very realistically question to the irrigation area healthy development.(1)Based on the observation an analysis of large number of literature references, analysis of the current channel anti-seepage project of several major forms of lining their own characteristics from the lining of the cross-section of the form and structure of the areas ; Summed up the basic measures to prevent frost heaving channels destruction, and destruction of frost heave characteristics of various forms of concrete lining channels ;(2)Through analysising U-shaped cross-section of the channel lining frost heave damage features, the mechanism that should be the optimal U-shaped cross section from the structure and hydraulic two considerations, through reasonable assumptions, a simple mechanical model reasonable to lining of Optimal performance of anti-freezing water and the principle of the best, the ultimate optimal launch cross-section of the U-shaped channel parameters arc at the end of central angle and the upper arc of the relative length of a straight line; (3)Analysis the reason of high groundwater irrigation and drainage channels slump, the characteristics and causes of damage frost heave, through structural measures to fundamentally solve the high level of groundwater irrigation channels under the conditions of slump and freezing damage, and many other engineering problems, ensure the irrigation and drainage channels to ensure the stability and the normal application of section; Preliminary study on the past few involved in the high level of groundwater irrigation and drainage channels frost heave damage mechanism and mechanical model, Unit will be the length of the hollow framework for lining channels for conversion by lining area, according to a comprehensive channel lining to establish a simple symmetrical mechanical model, only need select a biggest adfreezing force parameter, then solves on the channel liner plate's frost heaving pressure;(4)With the application of FEM software ADINA ,the paper simulates the frost heaving process of lining framework and the overall framework of lining Arc bottom trapezoidal channel, and has a deeply study on its temperature field, the stress and the deformation field, obtains the high water mark area arc bottom trapezoidal lining work channel heave stress and the distortion basic rule. Through the two comparative analysis, Concrete channels lining the framework that can effectively reduce the water table, enhance the contrast for effect, frost heave damage control channels, is solving the high level of groundwater irrigation and drainage channels slump and the destruction of effective measures to frost heave.