Theoretical studies of the installation weight of reinforced concrete structures

Summary. The article is devoted to the study of changes in the installation weight of reinforced concrete extrusion structure depending on structural, technological and other factors. The technology of reinforced concrete extrusion structures is an innovative and important step in increasing the efficiency and speed of construction of underground structures. The essence of the technology is that a monolithic structure is made on the ground surface in a modular form, and then, under its own weight, it is lowered into the excavated trench to the design depth, where it is fixed for further work. Therefore, one of the key parameters that determines the safety and reliability of the process is the installation weight of the structure. The article describes in detail the components that form the installation weight of a structure and analyzes the influence of design, technical and other factors on its value. The paper theoretically investigates the permissible maximum and minimum variants of the assembly weight with changes in geometric parameters: length (from 6 to 18 m), width (from 0.4 to 0.8 m) and height (from 10 to 50 m). The results show that changing these parameters significantly affects the weight of the structure both in general and during installation. The effect of the density of the clay slurry used to stabilize the trench walls and prevent their collapse was also investigated. It was found that increasing the density of the suspension reduces the installation weight due to the buoyancy effect. For example, at a density of 1.5 t/m³, the installation weight is reduced by up to 37%, and at a minimum density of 1.03 t/m³ - by up to 25%. The obtained results open up prospects for further research aimed at optimizing design solutions and improving the technology of reinforced concrete structures. In particular, it is important to develop methods to reduce the installation weight by using lighter materials and optimized structural shapes without losing the required strength.