Safety Management Of Deep Foundation Pit Construction Of Project A Based On Monitoring Data

As the 21st century dawns,China’s urbanization process is advancing at a rapid rate,with its scale broadening and its multi-level urban construction system gradually improving.No longer is the restricted area of land enough to satisfy the construction requirements of numerous projects,thus necessitating a great many deep excavation undertakings.The foundation pit engineering is mainly concentrated in the urban area,surrounded by various buildings(structures)and municipal pipelines.When excavating a foundation pit,the unloading of the soil causes a pressure difference between the inside and outside of the retaining structure,resulting in deformation and affecting the surrounding environment of the foundation pit.However,due to the fact that most deep foundation pit projects are temporary construction and have extremely limited safety reserves,safety accidents in foundation pits are repeatedly prohibited.The foundation pit engineering is a systematic engineering that intersects and influences each other.The complex and ever-changing influencing factors lead to continuous changes in the safety risks faced by the construction of foundation pit engineering.Accurately ascertaining the safety of the foundation pit during construction and implementing appropriate safety management measures is thus essential.The Shenzhen region includes the geological types of most regions in the country,and is currently one of the cities with the largest number and scale of excavation types in China.Based on the deep foundation pit project of Shenzhen A project,according to the relevant safety regulations,engineering geological conditions and surrounding environment,this paper analyzes the major hazard of the project,proposes targeted safety control measures for each stage of foundation pit construction,and formulates a complete emergency plan to prevent possible safety accidents during foundation pit construction.Due to the fact that the safety of foundation pit engineering is mainly reflected in the safety of the foundation pit support system itself and the safety of the surrounding environment,monitoring data can clearly reflect the changes in the foundation pit support system and the surrounding environment,providing us with valuable information to better understand these changes.Monitoring data is an important reference for evaluating the safety of foundation pits and taking necessary measures,so comprehensive and effective monitoring of foundation pits is particularly important.In the process of determining the safety of foundation pits,using real-time monitoring data from various monitoring projects can effectively avoid subjectivity in the safety assessment of foundation pits.Considering that the safety analysis of foundation pit engineering is an uncertain problem that not only has randomness but also fuzziness,a foundation pit safety evaluation model based on real-time monitoring data was constructed by organically combining the Analytic Hierarchy Process(AHP)and fuzzy comprehensive evaluation methods.Finally,this article takes the accidents during the construction process of the foundation pit project in Shenzhen A as an example,collects on-site monitoring data,and uses the AHP fuzzy comprehensive evaluation method to evaluate the safety of the foundation pit project.The evaluation results can truly reflect the actual safety status of the foundation pit.In the monitoring and alarm event of this article,the expert group analyzed the cause of the accident and provided handling suggestions.The conclusion further verified the rationality and applicability of the safety management measures and handling measures for foundation pits proposed in this article.The research in this article has certain practical value and significance for the safety management of foundation pit construction in the future.