Large-span two-arch and two-cable subway station structure by open-cut method

Abstract

The invention provides a large-span two-arch two-cable subway station structure constructed through an open-cut method. The large-span two-arch two-cable subway station structure comprises side walls, a top beam, a top plate, prestressed cables and an inverted arch, wherein the side walls are arranged on the two sides of an underground passage; the top beam is of an arc-shaped structure, and is supported at the top end of the underground passage through the side walls on the two sides; the span of the top beam is at least 20 meters; the top plate is of an arc-shaped structure corresponding to the top beam, is arranged above the top beam, and is used for closing the upper part of the underground passage; the prestressed cables are arranged below the top beam, and are used for connecting two arc feet of the top beam and applying horizontal pull on the arc feet; and the inverted arch is laid at the bottom of the underground passage. According to the large-span two-arch two-cable subway station structure, the span of over 20 meters of the top beam can be achieved through the prestressed cables, the heights of subway passages in all layers are increased, and a wider space is provided for pedestrians.

Description

technical field [0001] The invention relates to the field of pipe gallery construction of underground engineering, in particular to a construction of a large-span double-arched subway channel by using an open and cut method, which increases the channel height and prolongs the service life of the structure. Background technique [0002] According to the construction methods, subway stations can be divided into station structures constructed by open-cut method, cover-excavation method, underground excavation method and shield tunneling method. [0003] The common frame structure of subway stations designed by the existing open-cut method, the top beam generally adopts the structural form of normal flat beams and slabs. In other words, even if the stress tendon is installed inside the top beam, its height still exceeds 1.8m, which is equivalent to occupying 1 / 4 of the channel space, and its own weight is relatively large. The loss of its strength will increase, and the continu...

AI Technical Summary

Problems solved by technology

[0003] The common frame structure of subway stations designed by the existing open-cut method, the top beam generally adopts the structural form of normal flat beams and slabs. In other words, even if the stress tendon is installed inside the top beam, its height still exceeds 1.8m, which is equivalent to occupying 1 / 4 of the channel space, and its own weight is relatively large. The loss of its strength will increase, and the continuous safety of the structure cannot be guaranteed. Therefore, the building structure of the existing subway passageway does not maximize the compressive performance of concrete, and the construction period is long and the process is complicated. Visually, it also gives people a depressing feeling

Images