Railway Concrete Bedding Casing with Pre-positioned Attachment Means
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Solution Overview
Problem
The construction of ballastless railways is labor-intensive and time-consuming due to the use of heavy and difficult-to-handle positioning mechanisms, especially in challenging environments like tunnels or bridges, requiring specialized personnel for precise alignment and attachment of rails to concrete beddings.
Innovation Solution
A casing for concrete that allows for the construction of a well-aligned and finished concrete bedding with embedded reinforcement and prepositioned attachment means, such as dowels, which simplifies the attachment of rails without the need for heavy positioning mechanisms, using a gutter-shaped construction with demountable casing elements and connection elements that can be recycled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If heavy positioning mechanisms are used to ensure precise alignment of rails on concrete bedding, then manufacturing precision is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The casing elements are pre-positioned on the ground with precise geometry before concrete is poured. The attachment means (dowels, bolts) are pre-installed on the reinforcement within the casing, ensuring correct positioning is built into the formwork itself rather than requiring complex adjustment mechanisms later.
Solution Approach 2:
The casing acts as an intermediary tool that transfers the precision requirement from the final rail installation to the initial formwork setup. By making the casing itself the positioning reference, the need for heavy positioning mechanisms during rail attachment is eliminated.
2Manufacturing precision
If heavy positioning mechanisms are used for precise rail attachment, then manufacturing precision is improved, but ease of operation worsens
Solution Approach 1:
All positioning-related components (casing elements, reinforcement, attachment means) are prepared and positioned in advance during the concrete pouring stage. This preliminary action eliminates the need for heavy positioning mechanisms during subsequent rail installation, making operations much easier.
Solution Approach 2:
The casing structure itself provides the positioning function through its precise geometry and pre-installed attachment means. The system serves its own positioning needs without requiring external heavy machinery, enabling workers to easily attach rails by simply aligning them with the pre-positioned dowels and bolts.
3Manufacturing precision
If specialized personnel are deployed for complex positioning tasks, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
The precise alignment requirements are built into the casing and reinforcement structure before concrete pouring. This preliminary preparation of positioning elements allows standard workers to perform rail attachment without requiring specialized training or expertise, thereby increasing productivity while maintaining precision.
4Ease of manufacture
If traditional concrete bedding construction without prepositioned attachment means is used, then ease of manufacture is improved, but manufacturing precision deteriorates
Solution Approach 1:
The invention merges the concrete formwork (casing) with the reinforcement structure and the attachment means (dowels, bolts) into a single integrated assembly. This combination allows precise rail positioning to be achieved as part of the standard concrete pouring process, rather than requiring separate complex positioning operations later.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3~4B
AI summary
The present invention relates to a casing for concrete, appropriate for use in the construction of a concrete bedding of a railway, which casing includes a reinforcement, appropriate for reinforcing the concrete bedding and which reinforcement is connected bearingly to the casing, in which the reinforcement is connected bearingly to at least a part of at least one attachment means, which attachment means is appropriate for mounting at least one rail to the concrete bedding to be constructed and further relates to a method for the construction of a concrete bedding of a railway using the casing for concrete.