ABSTRACT
The article presents the analysis of an anchored beamless cast-in-place trench wall. In the usual practice, the analysis in question is 2D and sees trench wall as a continuous longitudinal structure, failing to consider the vertical joints between work zones, the non-interaction between horizontal longitudinal reinforcement of adjacent frames, the reducing stiffness of the trench wall due to two-directional cracking, and the inelastic behavior of the compressive zone of the concrete. Performed as part of a development project in Moscow, the calculation of the anchored beamless cast-in-place trench wall have shown that failure to take into account the above features of its behavior may lead to a largely distorted stress and strain state of the entire shoring during the erection and operation, and hence wrongly selected reinforcement of the shoring. The Midas GTS NX 2018-assisted structural calculations involved elements of various topology (2D and 3D) and used a three-dimensional problem. Alon with shoring design diagram, description is given in the article of the geoengineering and hydrogeological conditions of the construction site. The calculation data is presented in the form of isofields of horizontal and vertical displacements of the trench wall, and normal stresses in its planes for different simulation cases. Based on the results of the numerical modelling, a cast-in-place shoring design model is recommended that makes allowance for the actual stress and strain state.
