Analysis of the Monitoring and FEM Calculation of International Shopping Mall's Foundation Pit

According to the results of the monitoring,it is shown that the horizontal displacement of the top of the pile and the pile body's maximum deformation of the International Mall pit exceed the warning value,this is mainly due to the improper method of the sustenance backout,thus,the safety of the pit foundation depends not only on the rational design,but also on the rational construction.By the use of Drucer-Prager mode to make FEM calculation to this pit foundation,it is found that the calculation results are close to the actual monitoring curve,showing that this mode is appropriate.The horizontal transmutation of the inner supporting pit structure has the character of being small at the endpoints but big at the middle.The biggest displacement takes place at the vicinity of the pit bottom.The additive load has an obvious impact on the displacement of the pit foundation.