CAJ | 학술논문

采用三维非线性有限元方法分析深覆盖层上面板堆石坝防渗墙应力变形特性。建立考虑渗流作用的深覆盖层上面板堆石坝应力变形数值模型。在分析渗流作用对防渗墙应力变形特性影响的基础上，分析了防渗墙施工顺序和防渗墙深度对墙体应力变形的影响。结果表明：渗流作用使防渗墙的顺河向最大变形增加56．47％，使墙体的最大拉压应力分别增加22．47％和21．74％，不考虑渗流作用将使防渗墙应力变形计算结果偏于不安全。防渗墙靠后的施工顺序可以改善墙体的应力变形性状，悬挂式防渗墙贯入深度越小，其应力变形特性越趋于安全稳定。
채용삼유비선성유한원방법분석심복개층상면판퇴석패방삼장응력변형특성。건립고필삼류작용적심복개층상면판퇴석패응력변형수치모형。재분석삼류작용대방삼장응력변형특성영향적기출상，분석료방삼장시공순서화방삼장심도대장체응력변형적영향。결과표명：삼류작용사방삼장적순하향최대변형증가56．47％，사장체적최대랍압응력분별증가22．47％화21．74％，불고필삼류작용장사방삼장응력변형계산결과편우불안전。방삼장고후적시공순서가이개선장체적응력변형성상，현괘식방삼장관입심도월소，기응력변형특성월추우안전은정。
This paper analyzed the stress-deformation behavior of cut-off wall for concrete faced rockfill dam on deep overburden foundation by using three-dimensional nonlinear finite element method .The nu-merical model of stress-deformation of concrete faced rockfill dam on deep overburden foundation was es-tablished through considering effect .Based on the effect of seepage on stress-deformation behavior of the cut-off wall ,it analyzed the influence of construction sequence and depth of cut-off wall on wall body . The result shows that the seepage effect cause the increase of 56 .47%deformation along the direction of river, and the maximum tensile stress and compressive stress increase 22.47%and 21.74%respective-ly.The calculation result of stress-deformation of the cut-off wall is unsafe without considering the seep-age effect .The later construction sequence of the wall and shorter depth for the cut-off wall can improve its stress-deformation behavior .The less the depth of suspended cut-off wall, the behavior of stress-de-formation approaches safety and stability .