青岛建筑工程学院张振营老师在《岩土工程学报》１９９９年第２期发表的“Ｈｅｎｃｋｙ第二定律的探讨”一文（以下简称“张文”）。通过理论推导得出结论：沿β（α）滑移线移动，则α（β）滑移线曲率半径的变化等于沿β（α）线滑移的距离与ｃｏｓφ的乘积，其中φ为土体的? Prof. Zhang Zhenying of the Qingdao Institute of Architecture and Civil Engineering published a paper entitled “The Exploration of Hencky’s Second Law” published in the 2nd issue of “Journal of Geotechnical Engineering” (hereinafter referred to as “Zhang Wen”). The theoretical deduction leads to the conclusion that the change of the radius of curvature of the α(β) slip line along the β(α) slip line is equal to the product of the distance along the β(α) line slip and cosφ, where φ is the soil mass. of?