Longitudinal Prestressed Concrete Railway Sleeper Design
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Solution Overview
Problem
Traditional transverse sleepers in railways suffer from high impact loads, leading to track deformation and maintenance issues, while prior longitudinal sleepers face interference with electrical signals and erosion due to long-term exposure, increasing maintenance costs.
Innovation Solution
A longitudinal sleeper design featuring prestressed concrete beams with a concrete connection board instead of steel pipes, integrated manufacturing for simplicity and cost-effectiveness, through-holes to relieve thermal stress, and shock-absorbing pads to improve stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steel pipes are used as connectors in longitudinal sleepers, then the connection between longitudinal beams is achieved, but signal interference and erosion occur during long-term exposure
Solution Approach 1:
The patent replaces the steel pipe connector with a concrete connection board that is cast integrally with the longitudinal beams. This concrete structure eliminates the harmful effects of steel pipes (signal interference and erosion) while maintaining the connection function. The connection board is designed to be an integral part of the sleeper system, providing durable connection without the disadvantages of separate steel components.
2Device complexity
If transverse sleepers are used, then the track structure is simple, but load distribution is poor and track deformation occurs
Solution Approach 1:
The patent divides the traditional single transverse sleeper into multiple longitudinal beams connected by concrete connection boards. This segmentation allows the load to be distributed along the length of the track rather than concentrated at discrete transverse points. The longitudinal beams work together to provide continuous support, improving load distribution and track stability while maintaining structural simplicity through integral casting.
3Stability of the object's composition
If longitudinal sleepers with steel pipe connectors are used, then load distribution is improved, but maintenance costs increase due to erosion and signal interference
Solution Approach 1:
The patent merges the connection board with the longitudinal beams by casting them as an integral concrete structure. This eliminates the need for separate steel pipe connectors that require maintenance. The unified concrete structure provides continuous load distribution along the track while eliminating maintenance issues associated with steel components such as erosion and electrical signal interference, thereby reducing long-term maintenance costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively addresses signal interference and erosion issues, reduces maintenance costs, enhances structural stability, and improves train comfort by distributing load more evenly and absorbing impact, thus extending the service life of the railway system.
Implementation Method 1
the longitudinal beams are continuously arranged longitudinally along the rail, so greatly improve the distribution of train loads
Implementation Method 2
The longitudinal beam has the internal pre-tensioned rebar to increase the strength of the longitudinal prestressed concrete beam
Implementation Method 3
both ends of the shock-absorbing pad are respectively bound to the lower surface of the longitudinal beam and the upper surface of the bearing
Data Source
AI summary
A longitudinal sleeper and a damping railway system thereof are provided. The longitudinal sleeper comprises a pair of longitudinal prestressed concrete beams (1) respectively arranged under rails along a longitudinal direction of the rails, and concrete connection boards (2) transversely connected between the pair of the longitudinal prestressed concrete beams (1).