Non-column large-span repairable prestressed cable-arch combined structure of open-cut subway station

Abstract

The invention provides a non-column large-span repairable prestressed cable-arch combined structure of an open-cut subway station. The non-column large-span repairable prestressed cable-arch combined structure of the open-cut subway station comprises side walls, arched girders, a top plate and prestressed cables, wherein the side walls are arranged on the two sides of a subway tunnel; the arched girders are of an arc structure and are supported at the top end of the subway tunnel through the side walls on the two sides, and the span of the arched girders is at least 20 meters; the top plate is of an arc structure and is arranged on the upper portions of the arched girders and used for sealing the top of the subway channel; and the prestressed cables are arranged below the arched girders and used for connecting two arch legs of each arched girder so that horizontal tension can be applied to the arch legs. According to the non-column large-span repairable prestressed cable-arch combined structure of the open-cut subway station, the arched girders can bear external loads and pressure stress generated by the weight of the arched girder, the prestressed cables enable the rise of the arched girders to be increased by applying stress, and the pressure resistance characteristic of a concrete material is brought into full play. The combined structure is clear and reasonable in stress, simple in structure, repairable, convenient to construct, feasible in construction and the like, the resistance characteristics of the cable and the arch are brought into full play, and the purpose of achieving a large-space structure in an underground structure is achieved.

Description

technical field [0001] The invention relates to the field of pipe gallery construction of underground engineering, in particular to a structure that utilizes an open and cut method to construct a large-span subway underground station and can prolong the service life at the same time. 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] As far as the common frame structure of the subway station is designed by the open cut method, the arch beam adopts the normal flat beam and slab structure. If the structure is to form a large span without columns, for the 22m span underground structure of the open cut method, Stress tendons are applied inside the arch beam, and its height is still more than 1.8m; the size is too large, which is equivalent to occupying 1 / 4 of the space, and its own we...

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Problems solved by technology

[0003] As far as the common frame structure of the subway station is designed by the open cut method, the arch beam adopts the normal flat beam and slab structure. If the structure is to form a large span without columns, for the 22m span underground structure of the open cut method, Stress tendons are applied inside the arch beam, and its height is still more than 1.8m; the size is too large, which is equivalent to occupying 1 / 4 of the space, and its own weight is large. If the mid-span deflection is large, cracks will occur, and the stress tendons will deteriorate over time. The loss of growth will increase, and the continuous safety of the structure cannot be guaranteed. In this way, the compressive resistance of concrete and the tensile performance of steel cables are not maximized, and the construction period is long and the process is complicated. give people a feeling of depression

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