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在预应力混凝土压力管结构计算基本理论领域里,有些问题似应提出讨论,例如管上垂直土压力计算及动荷载计算中的某些地方。圆管上垂直土压力计算,多年来许多国家一直应用马氏(A.Marston)计算理论。但是,马氏建立的地下管上土压力计算模型(上埋式管)和推导的计算公式之间,有相互不符之处。为此,本文讨论了其计算公式错误之所在,另行建立了新的计算公式,并用新公式验证了我国一些单位的计算结果;及铁道部《铁路工程技术规程》中,根据实测数据而确定的涵管上垂直土压力计算系数的正确性。
In the field of basic structural calculations for prestressed concrete pressure pipes, some issues may seem to be discussed, such as the calculation of vertical earth pressures on pipes and certain parts of dynamic load calculations. The calculation of vertical earth pressure on circular tubes has been applied to A.Marston’s calculation theory for many years. However, there are discrepancies between the calculation model of the earth pressure on the underground pipe built by Markov (upper buried pipe) and the derived formula. For this reason, this article discusses the error of its calculation formula, establishes a new calculation formula, and verifies the calculation results of some units in China with the new formula; and in the “Railway Engineering Technical Specification” of the Ministry of Railway, it is determined based on the measured data. Correctness of vertical earth pressure calculation coefficients on culverts.