Monoblock Concrete Sleeper Structure to Prevent Rail Resonance Damage
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Solution Overview
Problem
Existing concrete sleepers in rail transportation systems experience resonance damage due to dynamic train loads, leading to shortened service life and increased environmental impact, and are often produced with prestressing and stirrups, which are costly and resource-intensive.
Innovation Solution
A monoblock concrete sleeper design using carbon fiber reinforced polyurethane laminates coated with garnet sand, without prestressing or stirrups, with specific dimensions and positioning, to prevent resonance damage and enhance mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If prestressing and stirrup reinforcement are used in concrete sleepers, then mechanical strength is improved, but manufacturing complexity and resource consumption increase
Solution Approach 1:
The invention extracts and eliminates the prestressing elements and stirrup reinforcements from the concrete sleeper design. By removing these complex reinforcement components, the patent achieves a simplified monoblock concrete sleeper structure that maintains adequate mechanical strength through optimized concrete formulation and geometry, thereby resolving the contradiction between strength requirements and manufacturing complexity
Solution Approach 2:
The invention changes the material parameters by using high-performance concrete with optimized composition and strength characteristics. By adjusting concrete parameters (strength class, aggregate composition, curing conditions), the patent achieves the required mechanical properties without needing additional reinforcement elements, thus reducing manufacturing complexity while maintaining strength
2Strength
If high-strength concrete is used in concrete sleepers, then mechanical strength is improved, but material consumption and production costs increase
Solution Approach 1:
The invention optimizes concrete parameters by using appropriately graded aggregates, water-cement ratios, and admixtures to achieve the required strength with minimal material consumption. The patent specifies concrete with optimized composition rather than simply using high-strength concrete, thereby reducing cement and aggregate consumption while meeting mechanical strength requirements
Solution Approach 2:
The invention uses composite material formulation in the concrete, combining cement, aggregates, water, and chemical admixtures in optimized proportions. This composite approach allows achieving required strength with reduced overall material consumption by leveraging the synergistic effects of different materials rather than relying on high-strength concrete alone
3Strength
If conventional concrete sleepers are produced with prestressing, then mechanical strength is improved, but energy consumption and production time increase
Solution Approach 1:
The invention extracts and eliminates the prestressing process from concrete sleeper production. By removing the prestressing operation (which requires tensioning equipment, anchoring systems, and prolonged curing), the patent significantly reduces energy consumption and production time while maintaining structural integrity through optimized monoblock concrete design
Solution Approach 2:
The invention changes the production parameters by using concrete with optimized strength development characteristics that achieve required mechanical properties through standard curing processes rather than requiring energy-intensive prestressing operations. This parameter optimization reduces both energy consumption and production timeline
4Stability of the object's composition
If conventional concrete sleepers are produced with stirrups, then structural integrity is improved, but manufacturing complexity and labor requirements increase
Solution Approach 1:
The invention extracts and eliminates stirrup reinforcements from the concrete sleeper design. By removing these additional reinforcement elements that require separate placement, tying, and concreting operations, the patent achieves a simplified monoblock structure that is easier to manufacture while maintaining structural integrity through optimized concrete formulation and monoblock geometry
Solution Approach 2:
The invention merges the structural functions previously performed by separate stirrup reinforcements into the monoblock concrete structure itself. By integrating all structural requirements into a single concrete element without additional reinforcement components, the patent simplifies manufacturing processes and reduces labor requirements while preserving structural integrity
Data Source
Figure 1~2
Figure 3~5
AI summary
The invention relates to monoblock concrete sleepers suitable for use in ballasted rail transportation systems operated with rail gauges of at least 1425 mm and at most 1445 mm, axle loads of at least 17 tons.f and at most 25 tons.f, and inter-sleeper-spacings of at least 50 cm and at most 65 cm that left between the center axes of the sleepers along the rail system route; obtained by using carbon fiber reinforced polyurethane laminate materials (4), (6), (7), (8), (9), (10), (11), (12) having a thickness of minimum 4500 microns and maximum 5500 microns (1), a width of minimum 10 mm and maximum 30 mm (2), a length of minimum 210 cm and maximum 225 cm (3), all surfaces coated with garnet sand having a grain size of minimum 250 microns and maximum 1000 microns, with a thickness of minimum 250 microns and maximum 1250 microns; without prestressing and stirrup reinforcement use; inside a cement-based concrete (21), which is having of at least 30 MPa and at most 40 MPa compression strength, with described specific sizes and placement (5), (13), (14), (15), (16), (17), (18), (19), (20); and have the main objective of preventing resonance damages of structural elements of rail transportation system and providing non-prestressed, no stirrups-used, and shorter length monoblock sleeper design.