Mathematical modeling of the stress-strain state of a soil during the construction of the underground part of unique buildings.

Recently, the technology of construction of underground parts of buildings and "top-down" structures has become more and more popular. The effectiveness of this technology has been noted by many authors. Underground fencing and spacer elements of the structure perceive significant loads not only during the exploitation period, but also during the construction of all levels of the underground part. When designing, it is necessary to take into account the change in the stress-strain state of the fastening of the walls of a deep pit. This paper presents the results of researching of changes in the stress-strain state of anchoring the walls of a deep foundation pit by the "wall in the soil" method in the numerical modeling of floor excavation using the "top-down" technology. A volumetric finite element model of the underground part has been developed, which provides for sequential excavation to a depth of one floor with an estimate of the SSS parameters at each stage of the work. [ABSTRACT FROM AUTHOR]