超大超深地下结构改造安全风险识别与评价体系研究

Study on Safety Risk Identification and Evaluation System of Super-deep and Super-large Underground Engineering Structure Reconstruction

随着我国城市建设的发展,地下工程结构改造工程日益增多。由于工程周边环境和复杂地层作用,地下结构改造的安全风险尤为突出。文章结合某工程改造实例,应用WBS-RBS方法分析识别了超大超深地下工程结构改造安全风险事件和关键风险因素;应用风险指数方法,从基坑支护体系、改造施工安全和结构安全等3个方面建立了安全风险评价体系,并结合工程的风险评价和关键风险因素分析,提出了风险应对措施,为地下结构改造工程风险管控提供参考。

With the development of urban construction in China,more and more underground works are being reconstructed.Due to the surrounding environment and complex stratum conditions,the safety risk of underground structure reconstruction is particularly prominent.Combining with engineering examples,this paper uses the WBSRBS method to analyze and identify the safety risk events and key risk factors of super-deep and super-large underground engineering structure reconstruction.Using the risk index method,the safety risk evaluation system is established from three aspects:foundation pit support system,reconstruction construction safety and structural safety.Combined with the risk assessment of engineering cases and the analysis of key risk factors,the risk response measures are proposed to provide a reference for the risk control of underground structural reconstruction project.