近几年发生的几起房屋整体倒塌事故，再次引起全社会的强烈关注。房屋倒塌不仅造成人民生命财产的巨大损失，而且社会影响很坏。从近两年倒塌房屋的特点分析，不难发现这类事故的性质有越来越严重的趋势，主要表现在：从局部倒塌发展成整体倒塌；施工中倒塌演变成使用中倒塌；? Several accidents of housing collapse in recent years have once again aroused strong concern from the entire society. The collapse of houses not only causes huge loss of people’s lives and property, but also has a bad social impact. From the analysis of the characteristics of collapsed houses in the past two years, it is not difficult to find that the nature of these accidents has become more and more serious, mainly reflected in the collapse from local collapse into an overall collapse; collapse in construction has evolved into collapse in use;