Prefabricated plate track structure applicable to circular tunnel

Abstract

A prefabricated plate track structure applicable to a circular tunnel comprises a base, geotechnical cloth and a track plate which are arranged in sequence from bottom to top. An adjusting layer used for eliminating manufacturing errors of the base and the track plate is arranged between the geotechnical cloth and the track plate. A connection site is arranged at the bottom of the track plate, a reinforcing mesh is arranged in the adjusting layer, and the connection site is fixedly connected with the reinforcing mesh. Drainage ditches are arranged on the two sides of the track plate. Each drainage ditch is defined by the corresponding side wall of the track plate, the top face of the adjusting layer and the corresponding side wall of the circular tunnel. The track plate is provided with two steel rails parallel to each other. The adjusting layer and the base are separated by the geotechnical cloth, so that later overhauling and maintenance of the base are convenient; meanwhile, since each drainage ditch is defined by the corresponding side wall of the track plate, the top face of the adjusting layer and the corresponding side wall of the circular tunnel, the section area of the drainage ditches is increased, and the drainage efficiency is improved; and a water current does not make contact with the base, so that the risk of water seepage of the base is reduced, and the service life of the base is prolonged.

Description

technical field [0001] The invention belongs to the field of rail transit construction, and in particular relates to a prefabricated slab track structure applied to circular tunnels. Background technique [0002] Compared with traditional cast-in-place track slabs, prefabricated track slabs have great advantages, such as fast construction speed, high quality, environmental friendliness, and good maintainability. They are especially suitable for underground tunnel rail transit. [0003] At present, the prefabricated track slab technology is mostly used in the ground line or elevated line of rail transit. The circular tunnel with an inner diameter of 5.4m underground has been plagued by problems such as tight limits, difficult drainage settings, poor structural integrity of the track slab, and difficult maintenance and repairs in the later period. Prefabricated track slab technology has not been popularized on a large scale. For example, in the patent application document tit...

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Problems solved by technology

[0003] At present, the prefabricated track slab technology is mostly used in the ground line or elevated line of rail transit. The circular tunnel with an inner diameter of 5.4m underground has been plagued by problems such as tight limits, difficult drainage settings, poor structural integrity of the track slab, and difficult maintenance and repairs in the later period. Prefabricated track slab technology has not been promoted on a large scale

For example, in the patent application document titled "A prefabricated slab-type damping track structure system and supporting construction method" with the application number "201610013534.7", the drainage ditch is poured from the filling layer, which leads to irregular shapes of the filling layer. The difficulty of pouring is increased, and at the same time, the cross-sectional area of ​​the drainage ditch is reduced, the drainage efficiency is reduced, and the water is in direct contact with the filling layer, which will also affect the service life of the filling layer

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