Foundation Pit Support Force And Deformation Research

With the rapid development of urban construction,more and more high-rise and super high-rise buildings and problems such as traffic congestion begin emerging.In order to adress those problems,the underground spaces of urban areas are quickly exploited.Hence,coming more and more subway deep foundation pits.Aiming at figuring out the force deformation regularity of those pits during their construction process,this paper conducts a brief research on some typical force deformations.Efforts are made in the following aspects:(1)By referring to relative domestic and foreign literatures,this paper masters basic knowledge of research on the force deformation in subway deep foundation pit,and makes a brief introduction of the support designs and construction parameters of the subway deep foundation pit engineering.and this paper also conducts conclusion and illustration about the interal force analysis and calculation of the foundation pit support structure,the classical soil pressure theory amd the numerical simulation method.(2)By acquiring the valid data about the force deformation regularity in the critical steps during the construction process of deep foundation excavation and shoring,carrying out appropriate analysis and processing of those data,applying classical soil pressure,this paper obtains the general law about the force deformation of deep foundation pit support during its construction process.(3)By resorting to the software of Tianhan to launch a numerical simulation on the construction and excavation of the deep foundation pit,this paper gets the regularity of force deformation on sectional retaining structure and support,finds out the factors and rules that affect the force deformation of deep foundation pit support.(4)By utilizing the maintenance of pile test data acquired through monitoring to validate the accuracy of the support deformation data,this paper analyses the errors and causes of those errors of the support force deformation data by comparing the data gained through monitoring with those of through software simulation.