一.关于契多夫的方法 魏璉同志所介紹的契多夫氏計算散体在圓壁上的主动压力的方法,笔者認为它的結果是与它的基本假設之一,即假定圓壁系絕对光滑(見原文P.28),这一点是不相容的。盖散体若与圓壁不發生摩擦力,則圓壁对散体的反力將無垂直分量,从而散体的重 1. On the method of the Chevov method Comrade Wei Wei introduced the method of Chidowov’s calculation of the active pressure of a loose body on a round wall. The author believes that its result is one of its basic assumptions, namely the assumption of a round wall. The system is absolutely smooth (see P.28) and this is incompatible. If the cover loose body does not generate friction with the round wall, the reaction force of the round wall to the loose body will have no vertical component and thus the weight of the bulk body