【摘要】 指出了用现有裂缝理论计算钢衬钢筋混凝土压力管道裂缝宽度的局限性 进一步完善了“外部管壁”的力学模型 ,并据此导出了精确度更高的半理论半经验公式 ,该公式考虑了混凝土保护层内外的裂缝宽度差异 最后给出了算例更多还原

【Abstract】 The limitations of present formulas for calculating crac ki ng widths of pressure pipelines made of reinforced concrete and steel liner,have been pointed out.The mechanical model for the external wall of pipelines of thi s type has been perfected further.And based on this modified model,a more accura te semi-theoretical and semi-empirical formula,which concerned the difference be tween the cracking widths inside and outside the protecting concrete layer,has b een deduced.Finally,a calculating example is given.更多还原