复合土工膜不同锚固型式对膜应力变形的影响研究

Different Anchorage Types of Composite Geomembrane Effect on Stress Deformation of Geomembrane

根据复合土工膜在土石坝坝顶锚固区的受力特点,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,分析了不同锚固型式对土工膜的应力变形的影响。结果表明,"U"型锚固沟型式对复合土工膜的应力变形影响最小,膜锚固于防浪墙上的型式对复合土工膜的应力变形影响最大,对实际工程的设计具有一定的积极意义。

According to the characteristics of stress deformation of composite geomembrane in the top anchorage area of earth-rockfill dams,with an engineering example,three-dimensional finite element method is employed to calculate the deformation and stress behaviors of composite geomembrane,and different anchorage types affecting stress deformation of geomembrane are analyzed.The results show that U-shaped anchor ditch has the least effect on stress deformation of composite geomembrane,anchorage pattern between geomembrane and that wave walls have the greatest effect on stress deformation of composite geomembrane,which is of positive significance to the actual project design.