本文介绍了一种新型钢筋砼排水管结构设计计算方法———管公称内径计算法。作者从基础理论推导 ,计算公式的建立、与实用例证演算等均作出了详尽的论述。 This article introduced a new reinforced concrete drainage pipe structure design and calculation method --- pipe nominal diameter calculation method. The author elaborates from the basic theory deduction, the establishment of calculation formula and the calculation of practical illustration.