Monitoring Technology And Data Analysis Of Deep Foundation Pit

In the development of The Times,the most prominent performance is the process of urbanization.More and more people choose to live in cities rather than in the countryside.As this feature becomes more and more prominent,people in cities have less and less space for activities and relaxation,and green Spaces are becoming high-rise buildings.Aboveground space has been unable to meet People’s Daily needs,in order to seek faster development,people began to turn to the underground space.Underground buildings,such as subway,underground shopping mall and underground parking lot,which are closely related to People’s Daily life,all belong to underground buildings.The construction of underground buildings has different emphases from that of above-ground buildings.In the process of production and construction of underground space,many problems do not exist in above-ground space will be faced.The excavation and support of deep foundation pit is the focus of construction units and related researchers.How to carry on the deep foundation pit excavation safely and reliably,and how to choose the reasonable support mode is the most important.Once in the process of deep foundation pit excavation,due to improper support problems,will cause a huge chain reaction and serious consequences.In order to study the excavation and support selection of deep foundation pit,we conducted research on a deep foundation pit project in Shenyang through field monitoring and actual data analysis.The main research contents are as follows:(1)According to the dynamic information of support stress change obtained from on-site real-time monitoring and combined with the actual hydrogeological conditions,the automatic information monitoring method is used to provide safety guarantee in the construction process.(2)Calculated according to the laboratory data simulation support system is easy to the position of the mechanical configuration changes according to calculation is about more than half of the early warning in supporting deformation under the condition of more than 9 mm or so,from the side can confirm that using information technology approach to support the monitoring system is very safe and reliable.(3)According to the actual field observation results and the actual situation in the process of deep foundation pit excavation,it can be found that the supporting structure has time and space effect before deformation,and the time and space effect is shown as the process of deformation from the cantilever forward tilt to the small on both sides and the large in the middle.(4)Since the supporting method used in the process of deep foundation pit excavation has a certain influence on its stress form and deformation change,the corresponding research can be carried out according to the form structure and material support adopted in the strip foundation pit supporting system.It can be found from the results that the axial force will change according to the depth of excavation,and the width of the foundation pit and the excavation scheme will also affect the stability of the supporting structure.(5)The corresponding simulation software can be used to effectively and accurately select the parameters,making the simulated data consistent with the actual situation,and using the simulation data to complete the preparation of the scheme before the construction of the foundation pit supporting structure.(6)Through the analysis of the actual situation and the data detection of the simulation,it can be found that the effective structure and steel bracing in the supporting system can exert the designed supporting force to more than 60% under the combined action,and at the same time,it can make the steel structure with small deformation produce better supporting effect.