论文部分内容阅读
河谷地形是影响面板堆石坝应力变形的重要因素之一,河谷地形不同导致面板坝边界条件不同,进而影响其应力变形状态。对某拟建坝高256 m的超高混凝土面板堆石坝在复杂地形条件下的应力变形进行分析,得出不对称不规则河谷对面板堆石坝的应力变形协调性影响较大,特别是右岸古河床阶地附近的坝体和面板应力变形梯度变化较大,不利于面板的安全,设计和施工时需采取措施进行处理。并通过与两种调整方案的结果进行对比,针对性的分析了右岸古河床阶地的影响。同时左岸陡岸坡导致面板拉应力和周边缝位移较大,通过与3种调整方案的结果进行对比,分析了陡岸坡的影响程度。
The valley topography is one of the important factors that affect the stress and deformation of the rockfill dam. Different topography of the valley leads to different boundary conditions of the dam, which will affect the stress and deformation state. The stress and deformation of a concrete dam with a height of 256 m and a height of 250 m are analyzed under complex terrain conditions. It is concluded that asymmetric valleys have a great influence on the stress and deformation coordination of the concrete faced rockfill dam, especially The right bank of the ancient riverbed terrace near the dam and the panel stress and deformation gradient changes, is not conducive to the safety of the panel, the design and construction of the need to take measures to deal with. By comparing with the results of two adjustment schemes, the paper analyzes the influence of ancient terraces on the right bank. At the same time, the left bank steep slope causes the panel tensile stress and the displacement of the perimeter joints to be larger. Compared with the results of the three adjustment schemes, the influence degree of the steep bank slope is analyzed.