Unsteady interaction simulation of a large RC shell with heterogeneous soil milieu for a gradually increasing caisson structure

[摘要] Prediction and simulation of large shells construction parameters in heterogeneous soil milieu provided considerable expansion of the rational use area of megapolices underground areas for deep transport facilities and engineering infrastructure. Mega sizes of an RC shell allow creating open underground areas, unique in volumes and deepness. The analysis of massive gravitational fencing shell behavior at its gradual increasing and driving into heterogenenous soil milieu allowed identifying the nature of their non-linear and unsteady one. Unsteadiness of the massive structure interaction processes and soil milieu causes the necessity to create methods for strain-stress behavior control of the system "gravitational large body - heterogeneous host medium" for decreasing aggravating influence of the unsteadiness effect on the lowering process. Due to joint step-by-step implementation of geotechnical and structural calculations a history of the shell-soil milieu interaction processes is modeled and the adaptive control parameters of strain-stress behavior are predicted, thus providing conditions of controlled lowering. The paper demonstrates results of the given concept implementation during the unique underground structures of St. Petersburg sewage system design and construction.

[发布机构] Emperor Alexander i St.Petersburg State Transport University, Moskovsky av. 9, St. Petersburg; 190031, Russia^1

[效力级别] 计算机科学

[关键词] Construction parameter;Design and construction;Engineering infrastructure;Heterogeneous soils;Prediction and simulations;Structural calculations;Transport facilities;Unsteady interaction