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为改善软弱基础上修建碾压混凝土拱坝的结构设计 ,通过对水压和温度荷载作用下坝体的应力和位移分析 ,提出了适应软弱基础拱坝变位大但应力不恶化的“柔性拱”及简易止裂措施 ,已用于修建新疆石门子碾压混凝土拱坝。坝体设人工短缝加大拱的变位 ,可消减水压和温度作用下的拉应力集中 ;扩大拱座降低坝肩软弱岩面上的压应力和剪应力 ,拱座考虑侧约束减少拱座在水压作用下的变位 ,也增加坝肩绕渗途径
In order to improve the structural design of RCC arch dam based on weakness, the paper analyzes the stress and displacement of dam body under water pressure and temperature load, "And simple crack stop measures, has been used to build Xinjiang Shek Munzi RCC arch dam. Dam body with artificial short seam to increase the displacement of the arch, can reduce the stress concentration under water pressure and temperature; expanding the arch seat to reduce the compressive stress and shear stress on the dam abutment weak side, the arch side constraints to reduce the arch Block displacement under the action of water pressure, but also increase the dam around the permeability pathway