碾压混凝土拱坝若干问题

Several problems of roller compacted concrete arch dams

多数情况下，采用碾压混凝土代替常规混凝土是可行的、经济的。片状骨料的水平趋向和碾压层间缝的存在将导致坝体材料的各向异性，这将引起坝体主要控制位置应力变化，使应力状态趋于危险。文中给出的温度场计算公式的计算结果说明将施工期放在冬季是合适的。

In most conditions,it is feasible and economical to substitute Roller Compacted Concrete(RCC)for Traditional Concrete in dam construction. Horizontal orientation of flaky aggregate particles and cracks between rolling layers will lead to anisotropy. This would cause stress increase at some control point of an arch dam. ResultS from the formula given in this paper indicate that it is suitable to build a RCC arch dam in winter.