岩土工程学报2016，Vol.38Issue(z1)：30-36,7.DOI:10.11779/CJGE2016S1006
高堆石坝面防渗土工膜锚固区夹具效应破坏模型试验
Model tests on failure properties of geomembrane anchorage due to clamping effect in surface barrier of high rock-fill dam
摘要
Abstract
Tension failure of geomembrane in anchorage zone of surface barrier for high rock-fill dams will be inevitably caused by clamping effect. A set of model tests are performed to verify and analyze the failure properties of geomembrane due to the clamping effect in the anchorage zone of surface barrier using self-developed devices. The test results show that the geomembrane cannot move freely and yield tension failure when differential settlement occurs between dam foundation and cutoff wall or dam surface and rock of bank slope. The excessive friction between the geomembrane and the contacting material is the main reason of tension failure of the geomembrane in small anchorage zone. The traditional anchoring structures including line-shaped anchorage, spirally wrapped anchorage and folded anchorage will all inevitably induce the excessive tension defamation of geomembrane next to their connection to anchorage structure. Under the same differential settlement, PVC geomembrane exhibits a stronger adaptability to the differential deformation compared with to PE and HDPE geomembranes. So the PVC geomembrane should be a preferred selection when used as the surface barrier for high rock-fill dam on thick pervious foundation.关键词
堆石坝/土工膜防渗体/锚固结构/夹具效应/模型试验Key words
rock-fill dam/geomembrane surface barrier/anchorage structure/clamping effect/model test分类
建筑与水利引用本文复制引用
吴海民,束一鸣,滕兆明,蒋善平,刘云锋..高堆石坝面防渗土工膜锚固区夹具效应破坏模型试验[J].岩土工程学报,2016,38(z1):30-36,7.基金项目
长江科学院开放研究基金项目（CKWV2015210/KY）；国家自然科学基金项目（51409083，51379069）；江苏高校优势学科建设工程项目 （）
