Light Railway Trough Structure with Modular Segmentation
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Solution Overview
Problem
Current technologies for installing tram rails require significant excavation and use of expensive special-purpose rails, making them costly and resource-intensive.
Innovation Solution
A light railway system comprising two parallel rails resting within trough structures, with blocks locating the rails and rigid ties holding the trough structures at a desired separation, allowing for reduced excavation and potentially lower costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rail installation methods are used, then the rails can be securely installed, but extensive excavation and high costs are required
Solution Approach 1:
The foundation structure is divided into discrete modular units consisting of a concrete base, vertical retaining walls, and integrated sleepers. Each module is self-contained and can be installed independently, reducing the need for extensive continuous excavation while maintaining structural integrity and rail security.
2Reliability
If special-purpose rails with deep grooves are used, then the wheel flanges are properly accommodated, but the rail cost increases
Solution Approach 1:
A metal strip is introduced as an intermediary component that fits into grooves formed by the retaining walls of the modular foundation units. This metal strip provides the necessary guidance and accommodation for wheel flanges, eliminating the need for expensive special-purpose rails while maintaining proper wheel-rail interaction.
3Loss of substance
If modular foundation units are used, then excavation is reduced, but the structural complexity increases
Solution Approach 1:
Multiple foundation components are merged into a single integrated modular unit: the concrete base, vertical retaining walls, groove formation elements, and sleeper attachments are combined into one pre-fabricated module. This integration simplifies installation by reducing the number of separate components to be handled and positioned, despite the increased structural complexity of each individual module.
Data Source
AI summary
A light railway system comprising two parallel rails (12) each having a base portion (14) with a flat bottom, an upward-extending web (15), and a railhead (16), and resting within a respective trough structure (20). The trough structure (20) comprising multiple trough units (22) arranged end to end, with blocks (24, 26) that fit between the web (15) of the rail (12) and side portions of the trough unit (22) so as to locate the rail (12) within the trough structure (20). The system also includes multiple spaced-apart rigid ties (28) that interconnect the trough structures (20), so the rails (12) are at a desired separation. Inserted junction plates (54) may be used to hold successive trough units (22) in alignment.