And reversely buckling and pressing prefabricated sleeper and reverse buckling and pressing prefabricated ballast bed

Abstract

A base layer is laid at the bottom of a tunnel, two longitudinally-arranged prefabricated sleepers are installed on the base layer, a center ditch is formed between the two prefabricated sleepers, a ditch cover plate is laid at the top of the center ditch to cover the center ditch, a plurality of rail bearing tables are arranged on the prefabricated sleepers, and steel rails are installed on the rail bearing tables. Grooves are formed in the bottoms of the prefabricated longitudinal beams, a plurality of transverse stiffening ribs are transversely arranged in the grooves and divide the groovesinto a plurality of pouring cavities, a plurality of pouring holes are further formed in the top of the prefabricated sleeper and communicated with the grooves, the limiting bosses are arranged in the grooves in a matched mode, and limiting grooves matched with the transverse stiffening ribs are formed in the limiting bosses. And a limiting block matched with the pouring hole is arranged at the top of the limiting boss. The method has the beneficial effects that lightweight production is achieved, installation is convenient and fast, on-site non-modular pouring is achieved, the material consumption is small, the ballast bed structure drainage capacity is improved after forming, and later operation and maintenance are facilitated.

Description

technical field [0001] The invention relates to the technical field of prefabricated ballast beds, in particular to reversely withhold prefabricated sleepers and reversely withhold prefabricated ballast beds. Background technique [0002] As an important part of the urban rail transit track structure, the ballast bed bears the load from the rail transit train and transmits these loads evenly to the track infrastructure below it. The construction quality of the ballast bed is very important. Traditionally, the whole ballast bed is cast on site, and the construction quality is often difficult to control. [0003] The prefabricated ballast bed adopts the form of factory prefabrication and on-site assembly, which can effectively control the quality of the ballast bed. However, due to the slab structure used in the prefabrication, in order to ensure the quality of its installation, it is necessary to level the base layer, lay an isolation film or use self-compacting concrete, and...

AI Technical Summary

Problems solved by technology

The construction quality of the ballast bed is very important. Traditionally, the whole ballast bed is cast on site, and the construction quality is often difficult to control.

[0003] The prefabricated ballast bed adopts the form of factory prefabrication and on-site assembly, which can effectively control the quality of the ballast bed. However, due to the slab structure used in the prefabrication, in order to ensure the quality of its installation, it is necessary to level the base layer, lay an isolation film or use self-compacting concrete, and the process is complicated. , the project cost is high, the installation speed is slow, and the construction requires the installation of large-scale special equipment. These shortcomings restrict the development and engineering application of prefabricated ballast beds.

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