Analysis And Application Of Supporting Construction And Monitoring Technology For Deep Foundation Pit Of A Hospital In Xuancheng

Xuancheng City is located in the southeast of Anhui Province,and its jurisdiction is located in the Yangtze quasi-platform area in the geological division.Xuancheng geological division can be divided into four engineering geological areas: floodplain area,interriver block area,hilly undulating area and low mountain and hilly area.The treatment of deep foundation pit in the process of urban construction should consider not only the safety and stability of itself under geological,hydrological and weather conditions,but also the adverse effects on surrounding buildings,structures and pipelines and cost control.Especially at present,Xuancheng city is in the period of urban construction and development.The demolition of old residential areas and the construction of new high-rise buildings are relatively concentrated.With the increase of buildings,the scale of foundation pit excavation is also growing.The construction environment of foundation pit engineering is becoming more and more compact,and the requirements of deep foundation pit supporting structure are also increasing.Through the theoretical calculation of the common mechanical properties of deep foundation pit support structure and the construction environment,the best matching is selected,and then the safety,economy and construction period are guaranteed by monitoring and other measures.This paper mainly carries out the following research work:1.Taking a hospital building project in Xuancheng as an example,the design and selection,construction technology and monitoring technology of deep foundation pit support structure are analyzed.2.Combined with practical engineering examples,the importance of timely design feedback in construction and monitoring process is analyzed.3.In view of the variability,comprehensiveness and strong practicality of deep foundation pit support engineering,under the condition of interaction among different regions,geological environments and construction environments,various forms of reinforcement support are adopted in combination with engineering examples to ensure the safety,economy and stability of the support structure.4.The key points of design,construction and monitoring are summarized.The research results can provide reference for similar deep foundation pit supporting projects,especially for the quality,safety,economy and construction period of deep foundation pit supporting projects in Xuancheng area.