Screed Beam Members for Pavement Longitudinal Groove Formation
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Solution Overview
Problem
The existing grooving construction methods for asphalt and concrete pavements are costly and time-consuming, particularly for forming longitudinal grooves, and often require additional steps like cutting and dust disposal, which increase construction costs and duration. Additionally, these methods are not effective in producing satisfactory drainage and durability.
Innovation Solution
A paving construction method using a screed device equipped with longitudinal groove forming instruments, where beam members are pressed into the pavement face during leveling to create longitudinal grooves, enhancing construction efficiency and durability by minimizing aggregate scattering and improving drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cutting method is used to form longitudinal grooves, then groove formation is achieved, but construction cost and construction period increase
Solution Approach 1:
The patent combines the groove formation function with the screed device used for leveling the pavement surface. The beam members are integrated into the screed device, allowing grooves to be formed simultaneously with surface leveling in a single operation, eliminating the need for separate cutting steps and reducing construction time
Solution Approach 2:
The groove forming action is performed during the leveling process before the pavement fully sets. The beam members press into the still-pliable pavement surface during screeding, creating grooves in advance of any subsequent cutting or finishing operations
2Manufacturing precision
If cutting method is used to form longitudinal grooves, then groove formation is achieved, but construction cost increases
Solution Approach 1:
The patent combines the groove formation function with the screed device used for leveling the pavement surface. The beam members are integrated into the screed device, allowing grooves to be formed simultaneously with surface leveling in a single operation, eliminating the need for separate cutting steps and reducing construction time
Solution Approach 2:
The screed device is given multi-functionality by adding groove forming capability. The same device that levels the pavement surface also creates the longitudinal grooves, eliminating the need for specialized cutting equipment and reducing overall construction costs
3Manufacturing precision
If conventional grooving methods are used, then grooves are formed, but aggregate scattering occurs reducing durability
Solution Approach 1:
The patent incorporates a vibration mechanism that acts on the beam members during groove formation. This vibration compacts the aggregate along the groove walls and prevents scattering, ensuring that aggregate remains in place and maintains the structural integrity and durability of the pavement
4Reliability
If transverse grooving is used, then skid resistance is improved, but longitudinal groove formation capability is lost
Solution Approach 1:
The patent makes the groove forming system dynamic by allowing the beam members to be positioned and oriented in different directions. The screed device can form grooves in the longitudinal direction while maintaining the ability to adjust for transverse grooving if needed, providing adaptability for different road conditions and requirements
Data Source
AI summary
A longitudinal groove forming instrument 11 is provided on a base plate bottom face of a screed 7, 8. The longitudinal groove forming instrument 11 comprises a plurality of beam members 12. The beam members 12 are disposed in parallel with the direction of travel of the screed as the axial direction. A longitudinal groove 20 is formed by the beam members 12 pressing into a leveled face when leveling a pavement face and moving in the direction of travel for leveling while the beam members are being pressed down.