Improvement of design, Geomechanical Substantiation and Development of Construction Technologies For the Closed Column Station Type of The Deep-Laid Subway

摘要

The paper is dedicated to the development and geomechanical substantiation of new design solutions of deep-laid subway of columned stations without side platforms. The authors have developed a new design of figure metal tubing that fits into the tunnel clearance. This solution allows the through tunnel boring with high performance shield complexes. In addition, the replacement of cast-iron wall-columns with reinforced concrete prefabricated or monolithic ones is proposed. This would eliminate the costly non-standard tubing, the width of which is connected to the distance between the doors of a train car. It is proposed to use the block lining instead of the tubing lining in the middle hall by releasing rocks with lifting jacks. This will increase the speed of installation and reduce surface subsidence. The use of hinges in the places of lining support on the column-walls made it possible to change the structural operation scheme of the typical station and reduce bending moments in pairings. We conducted a computational simulation of suggested design solutions in the spatial statement taking into account main technological stages of the construction process. The simulation results confirmed the possibility of implementing the proposed design of the column subway station.