The purpose of the study is the geotechnical substantiation of methods for the protection of underground, linear structures operated for a long time in difficult engineering and geological conditions, taking into account the combined effects of external forces and internal environmental influences. Taking into account the specifics of the set goal and the complexity of engineering and geological tasks, their achievement is proposed to be solved by modeling the interaction of underground aquifers with the host soil mass under the influence of external forceful static and dynamic influences. A calculation justification is given and methods for strengthening and protecting tunnel structures under various combinations of extreme force and dynamic impacts during train movement are presented. In order to take into account the specifics of the operation of sewer tunnels in difficult ground conditions, revealed as a result of instrumental, hydraulic and engineering-geological surveys, modeling of the interaction of underground reservoirs with the host soil based on geotechnical calculations (Plaxis 3D) was performed. As a result of the simulation, design situations were developed that take into account the most unfavorable conditions that may arise when force and dynamic loads are applied to linear underground structures. Based on the modeling results, an integrated approach to the choice of methods for protecting structures is proposed, and a calculated justification for their structural reinforcement is given. The implementation of the proposed methods of strengthening and protecting underground linear communications was successfully tested during the reconstruction of Russian Railways station facilities.
Nikolai Perminov (Thu,) studied this question.