Use of 2D and 3D modeling to assess the stress-strain state of retaining walls of complex configurations

A comparison of the calculation results foundation pit enclosure made flexible retaining walls is presented. Calculations were performed by method numerical modeling using Plaxis PC software, which based on finite element method. This task was implemented in three-dimensional (3D) and flat (2D) formulations problem, provides more opportunities for a comprehensive assessment stress-strain state (SSS) elements "soil massif - anti-landslide structures" system when complex configurations walls.
 within three sections different stages construction: 1st stage – initial faze (formation soil its natural state), 2nd excavation first layer pit, 3rd second pit. Based calculations, SSS analysis carried out reinforcement selected. An slope stability also at full pit.
 It shown that advantage plane FEM to assess anti-slide structures much smaller amount time spent calculations ease understanding, but disadvantage this lack possibility taking into account spatial stiffness structures. has been demonstrated use allows structures, future makes it possible effectively design however, quite labor-intensive requires significant resources computer equipment making calculations.
 According displacements obtained 2D are 6-43% than 3D modeling, bending moments 12-33% more.