不同坝高对复合土工膜防渗斜墙应力变形的影响

根据复合土工膜防渗体应用于土石坝时的防渗特点,结合工程实例,采用三维有限元方法对坝体和复合土工膜进行了数值模拟,分析了不同坝高条件下对土工膜防渗斜墙应力变形的影响。结果表明:与低土石坝应用复合土工膜防渗的情况相比,随着坝高的增大,复合土工膜不仅在坝顶锚固区处的应力应变较大,而且两岸锚固处的应力应变也随着坝高的增大而增大,在两岸坡脚锚固端处应力应变达到最大,对实际工程的设计具有一定的积极意义。

Effect of different heights of dam on stress deformation of anti-seepage inclined wall built by composite geomembrane

According to the seepage characteristics of anti - seepage body of composite geomembrane used in earth - rockfill dam, in combination with an engineering example, the paper used three - dimensional finite element method to simulate the deformation and stress behaviors of composite geomembrane, and analyzed the effect of different heights of earth - rockfill dam on stress deformation of anti - seepage inclined wall built by composite geomembrane. The results show that comparison with low earth -rockfill dam using composite geomembrane, with the increase of dam height, not only the stress and strain of composite geomembrane is greater in the dam crest and but aslo that is even greater at the anchorage zone, the stress and strain at the anchor end of foot slope reach the maximum. The result has certain positive significance for the design of actual project.