Application of Digital Twins for Deep Pit Construction during the Transformation of Cultural Heritage Objects
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Abstract
The behavior of excavation support structures in complex geotechnical conditions and dense urban development was investigated. A rational structural scheme was established using the example of restoration with adaptation – transformation – of a cultural heritage site.
For this purpose, during the scientific and technical support, a digital model (digital twin) of the deep excavation was created, and the stress-strain state (SSS) of the structure was determined in accordance with the design solutions, and recommendations for their optimization were developed. At the excavation stage, based on the analysis of observations of the support deformations and surrounding buildings, the digital model was adjusted, and design solutions for the strutting system were developed.
Deep excavations in complex soil conditions are an integral part of modern urban construction. In densely built-up areas and complex soil conditions, a number of tasks arise related to ensuring the stability of the excavation and the safety of adjacent buildings. The article discusses issues related to modeling the interaction of the "soil - excavation structure - adjacent buildings" system during excavation. The study is conducted using numerical modeling with nonlinear soil deformation laws.
The influence of various excavation support parameters (type, depth, location) on the stress-strain state of the soil mass and adjacent buildings is studied. Based on the results obtained, recommendations are proposed for selecting the optimal excavation support parameters to ensure its stability and minimize the impact on adjacent buildings.
A promising direction in the design of excavation structures is to increase the economic efficiency and reliability of design solutions by using rational structural schemes that take into account the site's characteristics. In complex configuration excavations, the SSS must be modeled using spatial models. Taking into account the spatial effects of the structural scheme make it possible to solve two main tasks: 1) maximum utilization of the structure's bearing capacity potential, reducing margins to acceptable values; 2) elimination of design errors caused by the discrepancy between the stress-strain state of structures, determined based on 2D model calculations, and their actual state.
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