1977年我队在北京东部地区进行地震地质调查,工作中于蓟县北黄崖关东侧的一个山脊鞍部,发现长城因下部断层活动而弯曲变形。这一古老建筑因构造运动发生形变的现象,在我国东部地区乃是首次发现。其在地质、地震、考古等方面,都具有十分重要的研究价值。本文简要介绍我们的初步调研成果,仅供有关方面参考。 In 1977, our team conducted an earthquake geological survey in the eastern part of Beijing. During the work, we found a mountain ridge saddle on the east side of North Huangya Pass in Jixian County and found that the Great Wall was bent and deformed due to the lower fault activity. The phenomenon of this ancient building being deformed by the tectonic movement was first discovered in the eastern part of our country. Its geology, earthquakes, archeology, etc., all have very important research value. This article briefly introduces our preliminary research results, for reference only.