Application Of Deep Foundation Pit Monitoring Technology Adjacent To The Yangtze River

The development of the city provides an opportunity for the economy,while economic development promotes the acceleration of the urbanization process.The rapid development of the city leads to a series of studies on the intensive use of land.In recent years,the exploration of urban underground space is one of the important research directions.The construction of traffic municipal projects,the development of underground public space etc.are bound to appear a large number of deep foundation pit works.Deep foundation pit construction is a complex dynamic process which has a variety of unpredictabilities.The changes of support structure,the surrounding environment of the pit and other circumstances may lead to safety accidents at any time,therefore it is necessary to carry out real-time monitoring of deep foundation pit during the construction process.It is so comprehensive,systematic and timely grasp of the foundation pit support structure,the surrounding soil and buildings,urban underground corridors and other changes that the foundation pit and the surrounding environment in a stable and safe state to ensure the smooth progress of the project.China’s current standard "construction pit engineering monitoring technical specifications"(GB50497-2009)in the pit engineering monitoring done a more systematic and comprehensive discussion,but during the actual construction process,for specific projects,monitoring methods and monitoring facilities need further study.The implementation of the program,this paper on the basis of standardized study,combined with the actual project,doing a specific study in the following aspects:1.During the process of foundation pit monitoring,the measurement principle and calculation method of horizontal displacement monitoring,,deep displacement monitoring,inclination monitoring and internal force monitoring are studied.On the part of the monitoring project error control method put forward their own views,greatlyimproving the monitoring accuracy.2.A monitoring program was designed and participated in the monitoring work of the140,000 square meters super large deep foundation pit of a complex building of the Riverside Shipping Center in Wuhan.A reliable guarantee for the safe construction of the foundation pit was provided through the analysis and evaluation of the monitoring data.3.In view of the requirements of the monitoring of the super large deep foundation pit,the principle of the layout of the measuring point,the determination of the monitoring project,the relevant technical points and the data collection and processing methods have been studied on the basis of the existing norms in order to do further supplement for the existing norms,providing reference for typical project.4.On the basis of summarizing the research work of this paper,the future development of monitoring technology is forecasted.