During the course of stress calculation, the concrete watertight wall and the soil around are supposed to be linear elastic material, the onsolidation of dam is supposed to be completed before the watertight wall is constructed, the contact element is adopted to simulate the interface between the dam and watertight wall, and the completed before the watertight wall is constructed, the contact element is adopted to simulate the interface between the dam and watertight wall, and the influence towards the stress of watertight wall when water elevation changes is calculated by fem 應(yīng)力計(jì)算時(shí)將砼防滲墻及周圍土體假設(shè)成線彈性材料,假設(shè)在防滲墻施工時(shí)壩體固結(jié)已經(jīng)完成,用接觸單元模擬壩體和防滲墻之間的接觸面,利用有限元計(jì)算出水位變化對(duì)防滲墻應(yīng)力的影響。