本刊1962年第11期刊登的“土坝地基粘土混凝土防渗墙结构计算”一文,作者本人来信,作如下补充: (1)当墙穿过不同介质的土层时,在交接处,弹性抗力系数有较大的变化(例如在粘土层和砂砾层交界处变化约2～3倍),用有限差分法直接列出方程式求解时,将产生较大的误差。经研究将不同土层的交界 The article published in 1962 No. 11 of “Earth Dam foundation clay concrete cutoff wall structure,” a text, the author’s own letter, make the following additions: (1) When the wall through the medium of different media, at the junction, flexible For example, the coefficient of resistance changes greatly (for example, about 2-3 times at the interface between clay and gravel). If the equations are directly listed by the finite difference method, large errors will result. The study will be the interface of different soil layers