Open-cut-method repairable three-arch and three-cable subway station structure

Abstract

The invention provides an open-cut-method repairable three-arch and three-cable subway station structure. The open-cut-method repairable three-arch and three-cable subway station structure comprises side walls arranged on the two sides of an underground channel, top beams, top boards, prestressed cables, a middle plate beam, and bottom arches, wherein the top beams are of an arc structure and are supported at the top end of the underground channel through the side walls on the two sides, and the span of the top beams is at least larger than 20 meters; the top boards are of an arc structure corresponding to the top beams, arranged on the top beams, and used for closing the upper portion of the underground channel; the prestressed cables are arranged below the top beams and used for being connected with two arch feet of the top beams so as to apply horizontal pulling force to the arch feet; the middle plate beam is arranged in the middle of the underground channel in the axial direction of the underground channel; and the bottom arches are laid at the bottom of the underground channel. Large span exceeding 20 meters between the top beams and middle arch beams can be achieved through the prestressed cables, the height of each layer of the subway channel is increased, and a more spacious 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 structure that uses open-cut method to construct a large-span repairable arched subway channel and can extend the service life. Background technique [0002] According to the construction methods, subway stations can be divided into station structures constructed by open-cut method, cover-cut method, under-cut method and shield method. [0003] The existing open-cut method design of the universal frame structure of subway stations generally adopts normal flat beams and slabs for the top beam. If the structure is to form a large span without columns, the open-cut underground structure with a span of 22m is required. In other words, even if the stress tendon is installed inside the top beam, its height is still more than 1.8m, which is equivalent to occupying 1 / 4 of the channel space, and its own weight is large. If the mid-span deflection is large, cr...

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

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