Determination of the actual excess excavation ratio (section “Kosino” - “Yugo-Vostochnaya”)

Conducting tunneling construction at any depth causes deformations of the earth's surface and, as a result, additional movements surrounding buildings, well changes in stress-strain state ground mass. When modeling site work to assess impact tunnels, it is necessary take into account volume loss soil. The purpose this determine technological parameter with further averaging and application design dispersed soils. article considers on buildings from two-track tunnel «Kosino» station «Yugo-Vostochnaya» Plaxis two-dimensional three-dimensional soil 1.5 %. tunnels was carried out by shield earth pressure balance cutting diameter 10.8 m. maximum about 27.0 m, dominated For considered section distillation tunnel, calculated for problem varies range 0.32 0.41 %, spatial - 0.52 0.78 With same draft building, there percentage increase 62 90 % between parameters obtained schemes both settings. Taking stage, results article, similar engineering geological conditions, contributes rational distribution funds, reducing geotechnical monitoring measures preservation compliance required standards safety regulations.