钢衬钢筋混凝土压力管道裂缝宽度公式的探讨

Study on formulas for calculating crack width of penstocks with inner steel liner and outer reinforced concrete

钢衬钢筋混凝土压力管道应用于大型水电站中,一般在设计时都允许混凝土出现裂缝,但对裂缝宽度进行了限制,而实际工程实测值往往超过计算值。结合三峡大比尺结构模型试验分析了用现有计算公式计算钢衬钢筋混凝土压力管道裂缝宽度的计算值与实测值的符合程度并对今后将进行的裂缝宽度的研究提供了建议。

Steel lined reinforced concrete penstocks are used in large hydraulic power station.The concrete cracks are permitted in design of penstocks,but the crack widths are not permitted to exceed the limited value. For the penstocks with inner steel liner and outer reinforced concrete ,their calculating crack widths using existing calculating formulas are compared with the experimental ones which are combined with Three Georges large-sized structure model tests, and we give some opinions for future cracking width research.