随着建设的不断增多,其占地面积也越来越大,为解决城市用地紧张的矛盾,建筑除向高空发展之外,还向地下深入而开发利用地下空间,以满足生产和生活日益增长的需要。地下铁道可说是最早出现的地下建筑,随后多种工业与民用的地下建筑也陆续具建。国外地下建筑已向多层次、多功能发展,例如日本在地下建有20余个商业及公共活动中心,最大的地 With the continuous increase in construction, its area is also growing. In order to solve the tension contradiction of urban land, in addition to the development of high altitude, the underground underground space is further developed and utilized to meet the growing production and daily life Need. Subway can be said to be the earliest underground construction, followed by a variety of industrial and civil underground structures have gradually built. Underground construction abroad has been multi-level, multi-functional development, for example, Japan has built underground more than 20 commercial and public activity centers, the largest