摘要
为深入了解挤压边墙对面板堆石坝结构性态的影响,以某工程面板堆石坝为对象,建立典型断面的平面模型,其中该模型包括非简化的挤压边墙和简化的等效厚度的挤压边墙2个模型。通过非线性有限元计算方法,对比分析了原始施工方法和挤压边墙施工方法的大坝应力变形状态;分析挤压边墙取等效厚度的计算是否合理;研究挤压边墙对整体面板和堆石体的应力和变形的影响。通过分析得出,挤压边墙对堆石体影响不大,而且有效地减小了面板在竣工期和蓄水期的挠度变形和应力,使工程更加安全经济。研究成果为挤压边墙施工的推广提供参考。
Extrusion side wall as a construction technique used in the upstream slope of rock-fill dam with concrete panel has been widely used in many projects. To understand the static and dynamic effect of extruded side wall acting on the rock-fill dam with concrete panel,2-D models of typical section of a concrete-faced rockfill dam are built,which contain the real extruded side wall and the extruded side wall with an equivalent thickness. The stress state and deformation state using the original construction method and the extruded side wall technique are compared and analyzed by non-linear finite element calculation. The rationality of extruded side wall's approximate treatment with an equivalent thickness is verified. Moreover,the effect of extruded side wall on the stress and deformation of panel and rock-fill body is researched. It's concluded that extruded side wall reduces the deflection deformation and stress of panel during construction finishing period and impounding period,but has no apparent impact on rock-fill body. It makes the project safer and more economical,and is worth popularization.
出处
《长江科学院院报》
CSCD
北大核心
2014年第4期68-71,共4页
Journal of Changjiang River Scientific Research Institute
关键词
挤压边墙
面板堆石坝
有限元单元法
应力变形
extruded side wall
concrete-faced rock-fill dam
FEM
stress and deformation
