文章提出并阐释了当代城市封闭性的来源。当代城市建设从开放离心性组织到封闭向心性组织的转变被定义为城市内爆。阶梯,作为城市内爆的结果,是一个有限的、封闭的分层系统,这和与网格联系在一起的传统城市截然相反。这一封闭系统看似是一种倒退,但它却可追溯至20世纪一系列具有进步意义的线性及中心性城市提案。尽管这些提案均对当代城市建设拥有巨大影响,然而德国城市主义者路德维希.希伯赛默,还是以其发现的定居单元及其广泛的运用,最准确地预测了城市内爆及阶梯。最后,文章论证了随着越来越多的网格被侵蚀,以及越来越多的阶梯建设,传统城市将不复存在。这将把我们引向超级城市的阶段,封闭向心性组织完全超越了开放离心性组织。 The article presents and explains the source of contemporary urban closure. The transformation of contemporary urban construction from open-ended organizations to closed-ended organizations is defined as an urban implosion. The staircase, as a result of the urban implosion, is a limited, closed, hierarchical system that is diametrically opposed to the traditional city linked to the grid. This closed system may seem a retrograde, but it goes back to a series of progressive linear and central city proposals of the 20th century. Although all of these proposals have a huge impact on contemporary urban construction, the German urbanist Ludwig Hebbmermer, with his discovery of settlements and his extensive use, has most accurately predicted the city’s implosion and the ladder . Finally, the article demonstrates that traditional cities will cease to exist as more and more grids are eroded and more and more steps are being built. This will take us to the stage of the super-city, and the closed-centripetal organization completely outperforms the open-hearted organization.