Rotatable Formwork Crossbeams for Railway Platform Geometry
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Solution Overview
Problem
Prefabricated railway platforms are not adaptable to varying infrastructure paths, leading to geometric mismatches and stress-induced damage, as they are manufactured with fixed design parameters and cannot continuously follow curved track layouts.
Innovation Solution
A formwork system with rotatable and translatable movable crossbeams that allow for the creation of platforms with adjustable track seating, enabling precise alignment with infrastructure paths by rotating and translating the crossbeams to match the path geometry, eliminating the need for operational tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If prefabricated platforms are manufactured with fixed design parameters, then manufacturing efficiency is improved, but adaptability to varying infrastructure paths deteriorates
Solution Approach 1:
The formwork introduces movable crossbeams that can be dynamically repositioned and rotated during the concrete pouring process. This allows the platform to be shaped with variable curvature and orientation to match the infrastructure path, transforming a static manufacturing process into a dynamic one that accommodates design variations.
Solution Approach 2:
The invention changes the geometric parameters of the platform during manufacturing by allowing the crossbeams to be positioned at different angles and locations. This enables continuous variation of the platform's curvature and orientation parameters, allowing adaptation to different path geometries while maintaining prefabricated construction efficiency.
2Ease of operation
If platforms are assembled using fixed engagement tolerances, then ease of assembly is improved, but geometric precision of the track path deteriorates
Solution Approach 1:
The geometric adjustments are performed during the concrete pouring and curing process rather than during assembly. The crossbeams are positioned to achieve the desired geometry before the concrete sets, eliminating the need to use engagement tolerances to compensate for geometric deviations during platform assembly.
3Adaptability or versatility
If platforms are tilted during engagement to follow curved paths, then adaptability to curved geometries is improved, but structural integrity deteriorates due to stress-induced damage
Solution Approach 1:
The formwork system allows the platform to be cast with the desired curved geometry from the beginning, rather than requiring subsequent tilting or adjustment during assembly. This eliminates stress-induced damage by avoiding forced engagement of rigid platforms at incorrect angles.
4Manufacturing precision
If continuous adaptation to path geometry is implemented, then geometric precision is improved, but device complexity increases
Solution Approach 1:
The formwork is divided into modular components, particularly the crossbeams that can be independently positioned and rotated. This segmentation allows complex geometric adaptations to be achieved through simple, repeatable operations on individual modules rather than requiring complex integrated mechanisms.
Data Source
AI summary
Formwork (1) for the construction of railway platforms, comprising: a container (2) in which building material to be shaped and subjected to hardening for the construction of a railway platform can be compacted; at least one fixed crossbeam (3) located at the bottom of the container (2); at least one movable crossbeam (4) provided with at least one pair of fastening imprints (5) arranged symmetrically and configured to model the material to form a pair of fastening seats apt to position the rails on the railway platform; placed side by side with the fixed crossbeam (3) and defining therewith an impression surface on which said material can be molded for the construction of said railway platform; said movable crossbeam (4) being rotatable and/or translatable with respect to said fixed crossbeam (3), the configuration being such that different rotations and/or translations correspond to different positions in the container (2) of the fastening imprints (5) and different impression surfaces.