深基坑施工期周边防汛设施的安全预警指标研究

Study on safety early warning index of flood prevention facilities around deep foundation pit during construction period

近年来城市地下空间飞速发展,城市内涝治理、防灾减灾体系和能力建设已纳入“十四五”规划。深基坑工程在施工期引起周边重要防汛设施安全事故屡见不鲜。本文提出在基坑工程设计阶段即考虑对周边防汛设施的影响,采用有限元软件对深基坑支护施工过程进行数值模拟,结合相关规范条例、工程经验制定施工期防汛设施的安全预警指标。在施工过程中,可再结合实测数据,调整数值模型,对预警指标进行修正,以期实现动态设计及信息化施工。

With the rapid development of urban underground space in recent years,urban water logging control,disaster prevention and preparedness system and capacity building have been included in the“14th five year plan”.It is not uncommon for deep foundation pit engineering to cause safety accidents of important flood prevention facilities around during the construction period.In the paper,the influence on the surrounding flood control facilities is considered in the foundation pit engineering design stage.The finite element software is used to simulate the construction process of the deep foundation pit support,and the safety early warning index of the flood control facilities during the construction period is formulated combined with the relevant regulations and Engineering experience.In the construction process,combined with the measured data,the numerical model can be adjusted to modify the early warning index,so as to achieve dynamic design and information construction.