本文介绍了临近海港的天津塘沽某业务综合楼、深基坑钢筋混凝土支撑梁,首次应用缓冲垫减震爆破拆除方法,并提出柔性防护新措施。深基坑共设三道钢筋混凝土水平支撑梁,详细介绍了爆破拆除设计原则和施工工艺。并对几种常用的基坑支撑环梁拆除方式,爆破拆除、机械拆除和人工拆除的施工特点和经济性进行对比和分析。 This paper introduces a business complex in Tianjin Tanggu adjacent to the harbor, reinforced concrete support beam for deep foundation pit, the first application of cushioning blasting demolition method, and puts forward new measures of flexible protection. A total of three deep-foundation pit reinforced concrete horizontal beam, detailing the demolition design principles and construction techniques. And compared and analyzed the construction characteristics and economy of several commonly used methods of dismounting support ring beam of foundation pit, blasting demolition, mechanical demolition and artificial demolition.