二十多年来,我国对明洞设计和施工都有了很大改进和提高,但仍存在一些问题。本文提出讨论的就是一些常遇到的问题。文中提出的落石统计资料和双层回填层的意见都很宝贵。本刊发表此文,以期引起有关同志积极提供资料展开问题的讨论(如落石冲击速度、冲击深度和冲击力等),使明洞设计提高到一个新的水平。 For more than 20 years, our country has made great improvements and improvements in the design and construction of Myeong-dong, but there are still some problems. The issues raised in this article are some of the common problems encountered. The statistics of falling rock and the double-layer backfill proposed in this paper are very valuable. The article is published in this paper with a view to arousing the discussion of active gag information (such as rockfall impact speed, impact depth and impact, etc.) so as to raise the design of Myeong-dong to a new level.