【摘要】 拱坝的基础置换处理加固对高拱坝应力的影响和作用非常敏感,在施工期内,高拱坝的整体结构是随大坝不断浇筑增高、封拱和蓄水而逐渐形成的,坝体结构形式在施工过程中承受的自重荷载与温度荷载也不断变化。采用三维有限元软件对溪洛渡拱坝施工期进行了全过程仿真分析,比较了基础置换混凝土的两种浇筑方案对拱坝整个施工期的温度场及温度应力的影响,得到了整个施工过程中拱坝温度场及温度应力变化的一般规律,为控制混凝土拱坝的温度应力和进一步研究拱坝施工期的力学性质提供了理论依据。更多还原

【Abstract】 The stress and deformation of a high arch dam are very sensitive to foundation replacement treatment.During the construction period,the high arch dam′s whole structure is formed gradually with successive dam concrete pouring,arch sealing and water storage,and the self-load and temperature load of dam structure changes continuously.The whole process of Xiluodu arch dam construction is simulated and analyzed by 3-D finite element software,and the influence of 2 grouting modes of foundation replacement blocks on temperature field and temperature stress is compared and the general laws of temperature field and temperature stress variation of arch dam during the construction period are obtained.The study results provide theoretic basis for controlling the temperature stress and further research on stress condition of arch dam during construction period.更多还原