事实上,城市下沉,离我们的生活已经不遥远了。用一个更准确的名词来表达,“城市下沉”应该叫“地面沉降”。地面沉降是近年来我国和世界上许多城市出现的重要的地质灾害之一,它是一种由多种因素引起的地表海拔缓慢降低的现象。由于地面沉降发生范围大且不易察觉,又多发生在经济活跃的大中城市,因此对人们生活、生产、交通和旅游环境影响极大,已成为一种世界性环境公害。据统计,目前世界上已 In fact, the city is not far away from our life. To use a more accurate term to express “city sink ” should be called “land subsidence ”. Ground subsidence is one of the important geological disasters in our country and many cities in the world in recent years. It is a kind of phenomenon that the surface elevation slowly decreases due to many factors. As land subsidence occurs in a large area and can not be easily detected, it occurs in large and medium-sized cities that are economically active. Therefore, it has a great impact on people’s life, production, transportation and tourism environment and has become a worldwide environmental pollution. According to statistics, the world has now