The article analyzed the results of the calculation of the monolithic trench “wall in soil” (WIS) with fastening attachment anchors without the use of distribution beams based on solving a spatial problem with the different topology of the fence elements. In practice, when solving such problems in a flat arrangement, it is assumed that the WIS is a solid construction in the longitudinal direction, vertical concreting joints are not taken into account, formed between grabs, rupture along horizontal longitudinal reinforcement between adjacent spatial frames, reduction of the rigidity of the WIS structure due to the formation and opening cracks in two directions, as well as inelastic operation of the compressed zone concrete. Analysis of stress-strain state (SSS) of the fence construction structure based on the results of spatial calculation with different topology (flat and volumetric) of finite elements (FE) showed the need to correct the calculation methodology. Based on the results of the calculations, it was found that the values of internal forces in the design obtained using flat FE are significantly overestimated. Based on the numerical method of studies, recommendations on the selection of the design scheme of the monolithic reinforced concrete structure of the pit’s fence are proposed and the calculation methodology is corrected. The subject of the study, the results of which are presented in this article, was the specifics of the operation and calculation of the WIS with anchor attachment without distribution beams and the analysis of the calculation results based on the solution of the spatial problem with different topology (flat and volume) of the FE structure of the fence.

The article describes the features of modeling monolithic trench “diaphragm wall” with ground anchors without the use of distribution beams on the progressive collapse caused by the failure of one of the anchors. In the simulation of the above calculation case, in the flat formulation commonly used in practice, it is assumed that the “diaphragm wall” is a continuous structure in the longitudinal direction, without taking into account the presence of vertical joints formed between the grippers when concreting the fence and the lack of connection between the longitudinal reinforcement of adjacent reinforcement spatial frameworks. The performed calculations show that the failure to take into account these circumstances leads to a significant reassessment of the ability of the “diaphragm wall” to redistribute the load from the broken anchor to the neighboring anchor and can lead to an incorrect assessment of the results of the calculation for a progressive collapse. The need to take into account the reduction of structural rigidity of the “diaphragm wall” due to the formation of cracks in two directions is also shown.

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The article is devoted to one of the most effective and promising methods for improving the structural properties of soils - the method of “Geocomposite”. The method is based on the compaction and reinforcement of the soil through the injection of mortar under high pressure, as a result of which there is a fundamental change in the soil body and the formation of a rigid structure naturally inscribed in the soil layer. The method is widely used both to improve the mechanical properties of soils for new construction, and for raising and eliminating the tilt of the operated buildings (compensation injection). The article presents brief information about the technology of shoring soil using the “Geocomposite” method and the main differences in the formation of fixed volumes in cohesiveless and cohesive soils.