复合土工膜在新疆严寒地区大坝建设中的应用

介绍了复合土工膜在新疆严寒地区土工膜防渗面板堆石坝和病险水库加固中的应用。在博斯塘水库大坝建设中,防渗关键是复合土工膜自身质量可靠,以及其与周边连接可靠。在白土坑水库加固中,坝坡铺设复合土工膜,坝基进行垂直铺塑并将两者连为一体。两个应用实例分析表明:在负温情况下,应避免土工膜下垫层的沉降变形以及土工膜的扰动,防止土工膜发生脆断破坏;复合土工膜在严寒地区完全可以正常使用,满足其各项物理力学性能的要求。

Application of composite geomembrane to dam construction in severe cold area of Xinjiang

An introduction was given to the application of composite geomembrane to construction of a concrete faced rockfill dam and to strengthening of a dangerous reservoir in severe cold area of Xinjiang.In construction of Bositang Reservoir,the effect of seepage control is mainly affected by the quality of the geomembrane and its connection with surrounding materials.In strengthening of Baitukeng Reservoir,the dam slope was paved with composite geomembrane,while the dam foundation was paved with plastic film in vertical direction,and the two materials were connected tightly.Practices show that,at the temperature below zero,it is necessary to avoid settlement of underlying surface and disturbances of geomembrane to prevent its brittle failure.Therefore,geomembrane can be used in severe area,and it can meet the requirement for physical-mechanical performances.