Deformations assessment during subway escalator tunnels construction by the method of artificial freezing of soil for the stage of ice wall formation

The work is devoted to the study of processes displacement and deformation surface during escalator tunnels construction subway by method artificial freezing soils. features technology, rocks characteristics in which made are considered. data specially organized, full-scale surveying observations deformations on earth presented. main factors influencing frozen strata a layered inhomogeneous rock mass with inclined tunneling determined, complexity predictive task need simplify design scheme shown. focused assessment least studied geomechanical soil heaving-uplifts periods active passive stages. When studying displacements mass, finite element analysis obtained using field were used. A simplified calculation proposed for modeling, allows taking into account uneven influence an large tunneling. satisfactory convergence results modeling period stages recommended prediction at underground construction, characterized development most dangerous tensile buildings structures surface.