【摘要】 复合土工膜作为一种新型的防渗结构体应用于堆石坝工程,效果突出,但是在土工膜的锚固处容易产生应力集中,出现"端部固定效应".本文结合国外某工程实例,应用商业软件FLAC3D,采用三维显式有限差分法分别对不同锚固方式情况下复合土工膜的应力、变形进行计算分析.结果表明,采用不同的土工膜锚固方式对其受力有一定的影响,在实际工程中,应采用合适的复合土工膜锚固方式改善土工膜的受力状态,减小"端部固定效应"的影响.更多还原

【Abstract】 Composite geomembrane as a new type of impermeable structure used in rockfill dam with outstanding effect;but it is easy to produce the stress concentration in the geomembrane anchorage place and the end fixed effect appeared.Combined with a foreign engineering example,adopting the three-dimensional explicit finite difference method,the stress and deformation of different anchoring ways of composite geomembrane are calculated and analyzed by the commercial software fast Lagrangian analysis of continua in 3D(FLAC3D).The results show that the different anchoring ways of geomembarne have an effect on its stress;and the appropriate geomembrane ahchoring way should be used to improve its stress condition to reduce the end fixed effect in practical projects.更多还原