现状分析及项目背景我国处在环太平洋地震带和欧亚地震带之间,是世界上地震灾害最严重的国家之一,我国的地震主要发生在23条地震带上(见图1),这些地震带分布于河北、山东、内蒙古、山西、陕西、甘肃、宁夏、新疆、云南、四川、西藏等省和自治区,其它区域虽然也有地震发生,但是数量比较少,强度也不是很大。 Situation Analysis and Project Background China is one of the most severely affected countries in the world between the Pacific Rim and the Eurasian Seismic Belt. The earthquakes in our country mainly occur on 23 seismic zones (see Figure 1). These The seismic belts are distributed in Hebei, Shandong, Inner Mongolia, Shanxi, Shaanxi, Gansu, Ningxia, Xinjiang, Yunnan, Sichuan and Tibet provinces. Although earthquakes also occur in other areas, the numbers are relatively small and the intensity is not great.