Establishment Of Mechanics Models And Numerical Stimulation Of Frost Heaving Damage Of U-Shape Canal With Concrete Lining

With the developing of economy of our country society , gradually, short-supplied contradiction of water resource lays stress on , building water-saving type social development and water-efficient irrigation are imperative. In our country, seasonal frozen area , people built large amount of canal defending against a project oozing , among them, U shape concrete lining adopts broadly because its condition is easy to take up field area ,it can stop resisting to be frostbitten swelling and so on. In winter, canal base is swelling, these canals are destroyed, some one even lose defend against significance ooze , thereby, bring about irrigation area keeping the administration cost increasing in repair , investment repeat .Whose main cause is failing to know the law of canal freezing, when designing canal, it have no way to accurate think that the negative temperature , the effect between the lining and canal. So, it is agent to solve this problem.This paper has been listed on the basis of reading and analysing large amount of document data , has summed up the theory being related to the problem detailedly, such as the current situation ,concrete lining builds canal jelly swelling mechanism and various lining build form new prevention and cure technology , and so on. And then for canal of U-shape, has been emphasized on the mechanism of freezing and characteristic of destroying ,with the proper hypothesis, this paper builds up mechanism models of concrete lining canal of U- shape. In need of choosing a maximal congealment force as the variable parameter, the freezing force can be solved, so do as the part of crack, depth of lining.At the same time,with the application of FEM software ANSYS ,the paper simulates the frost heaving process of U-shape canal, and has a deeply study on its temperature field, the stress and the deformation field. The theoretical analysis results agree well with the local test and the former, that's to say, the FEM numerical simulation of heaved canal would provide theoretical base for canal engineering design and mechanics calculation in seasonal frozen soil area.